Japan’s Missile Defense
Diplomatic and Security Policies
In a Changing Strategic Environment

Hideaki Kaneda

Kazumasa Kobayashi

Hiroshi Tajima

Hirofumi Tosaki

March 2007
The Japan Institute of International Affairs

“Japan’s Missile Defense – Diplomatic and Security Policies
in a Changing Strategic Environment”
Foreword
This report summarizes the major outcomes of our institute’s research project on missile defense.
Since the end of the Cold War, one serious threat against international security has been the
proliferation of weapons of mass destruction and missiles to deliver them.

To counter such a

threat, Japan decided to start joint technical research on ballistic missile defense (BMD) with the
US in 1998, and the Japanese government in December 2003 announced its decision to introduce
BMD systems.

Later, in December 2005, Japan-US joint technical research was upgraded toJapan-US joint development on BMD interceptor missiles (SM-3) to be installed on Aegis ships.
Needless to say, such a development was an important step forward for Japan’s missile defense. In
further promoting missile defense in the future, however, there remain many different anddifficult problems that should be addressed and resolved.

Moreover, countermeasures against

missile threats are not necessarily limited to just one form of missile defense to intercept missiles
flying into Japan.

To prevent, eliminate and neutralize the threats of missiles, and to confine thedamage caused by missiles, more comprehensive measures combining every conceivable approachto mitigating the threats of missiles must be adopted and implemented with greater efficiency andeffectiveness.
With thorough recognition of the above issues, this research project reviewed comprehensive
measures that Japan should adopt to confront missile threats by conducting periodic meetings anddiscussions, and arranging opportunities to exchange views with governmental officials, experts,
and professionals, including those in the US and Europe.
We would like to acknowledge here various individuals who have contributed to the study, andexpress our sincere appreciation to the research project members Hiroshi Tajima, Kazumasa
Kobayashi and Hideaki Kaneda—all three were senior adjunct research fellows of our institute at
the time—and Hirofumi Tosaki (Research Fellow of our Institute) for their active efforts in
conducting research and writing this report; Yusuke Nagai (Japan’s Independent Institute Co.,
Ltd.) for the assistance in this study; and other experts and professionals from both the public andprivate sectors for their cooperation in exchanging views.
It should be noted that the views expressed in this report are those of the individual authors, thatis, the research project members, and do not necessarily reflect the views of our institute.
However, we sincerely hope that the report will present valuable views and information onreviewing Japan’s missile defense policies.
March 2007
Seki Tomoda
Director-General
The Japan Institute of International Affairs

Contents
Introduction:
Part 1

Ballistic Missile Launches by North Korea···········································1

Responding to Missile Threats ····································································13

Chapter 1

Missile Threats and Responses by Specific Countries ··················································· 13

Chapter 2

Missile Threats to Japan ································································································· 30

Chapter 3

Comprehensive Measures against Missile Attacks························································· 43

Part 2BMD Initiative as Active Defense Measures ················································53

Chapter 4

Japan’s Ballistic Missile Defense ·················································································· 53

Chapter 5

Issues and Measures of Policies····················································································· 71

Chapter 6

Enhancement of Japan-US Joint Operations Structure ·················································· 83

Chapter 7

Development of C2BMC ································································································· 92

Part 3Comprehensive Measures for Responding to Missile Attacks ···················103

Chapter 8

Japan’s Participation in Arms Control, Disarmament and Non-Proliferation················· 103

Chapter 9

Establishing Deterrence Posture··················································································· 125

Chapter 10

Offensive Defense Measures························································································ 142

Chapter 11

Passive Defense Measures ·························································································· 158

Chapter 12

Defense Industrial/Technology Base ············································································ 167

Chapter 13

Responses to Cruise Missiles······················································································· 181

Introduction:
1.

Ballistic Missile Launches by North Korea

North Korea's Ballistic Missile Launches and Nuclear Test Explosion

On October 3, 2006, a statement by North Korea’s Foreign Ministry declared that country’s
intention to conduct nuclear tests, followed on October 9 by an announcement that theunderground nuclear test explosion had been conducted “under safe conditions.”

It is still not

clear whether it was successful, so detailed analysis must wait for another occasion.

However, it

is at least clear what North Korea’s announcement meant to the international community.

The

US government thinks that it will take another several years for North Korea to possess nuclear
warheads that can be delivered on ballistic missiles.

Still, North Korea’s announcement of a

nuclear test as well as its recent series of ballistic missile launches have further heightened
Japan’s realization of the need for comprehensive measures against missile attacks.

From mid-May 2006, North Korea showed signs of preparing to launch a Taepo Dong 2 ballistic
missile.

On July 5, just when some observers held the optimistic view that North Korean leaders

would not launch, they surprised the world by firing a series of ballistic missiles.
one Taepo Dong 2,

In addition to

Scud and Nodong missiles were also launched, for a total of six missiles on themorning on July 5 (JST) and one more that evening.

All missiles landed in the northern Sea ofJapan off the coast of Russia’s Primorye Province.

The Taepo Dong 2 was launched from Musudan-Ri Base, North Hamgyong Province in thenortheastern region of North Korea, but fell into the water off the coast of North Korea about 40
seconds later. According to statements at the September 15 press conference of Japan Defense
Agency Director General Fukushiro Nukaga, the first stage of the North Korean Taepo Dong
missile broke up in the air within several dozen seconds of launch without being separated, andcrashed near the launch site. At present, analysis by Japan and the US indicates that the Taepo
Dong 2 launch was a failure, but final assessment should wait for additional confirmation.

Theother ballistic missiles are thought to have been launched from the area of Kitdaeryong Base in
the southeast part of North Korea; these landed in the sea several hundred kilometers northwestof Niigata Prefecture in Japan.

The ballistic missiles launched from North Korea appear to include Scud Ds with a range of 700km,
or Scud ERs with a range of 1000km, which shows that North Korea has continued to improvealready deployed Scud missiles.

Scud ERs can reach the western half of Japan, and thus North

Korea’s progress in developing and mass producing these new types of Scud missiles raises serious
concerns.

－1－

Prior to the launches, North Korea declared a moratorium on the launching of long-range ballistic
missiles in the Geneva Agreement with the US in 1999.

In the Japan-North Korea Pyongyang

Declaration in September 2002, North Korea “expressed its intention that, pursuant to the spiritof this Declaration, it would further maintain the moratorium on missile launching in and after
2003.”The missile launches in July 2006 were in defiance of North Korea’s previous

commitments with the US and Japan, as well as messages from the international community,
including China, requesting restraint.

The North Korean Foreign Ministry Spokesman said on July 6 that the missile launches were apart of routine military exercises that are North Korea’s legitimate right as a sovereign state.

Heargued that North Korea was not bound by any bilateral or multilateral agreements such as the
Geneva Agreement, Pyongyang Declaration or the Joint Statement of the Six-Party Talks because
the moratorium on long-range missile tests to which North Korea had agreed with the US in 1999
was valid only when North Korean-US dialogue was underway.

He further made theintimidating comment that North Korea “will have no option but to take stronger physical actionsof other forms, should any other country dare take issue with the exercises and put pressure uponit.”Song Il Ho, the North Korean ambassador in charge of diplomatic normalization talks withJapan, also commented in his press conference that the statement by the North Korean Ministryof Foreign Affairs had taken Japan into consideration, and said that “if Japan condemns North
Korea, then North Korea will have to take a much stronger physical response.”2.

Responses of Northeast Asian Countries

The responses by Northeast Asian countries to North Korea’s ballistic missiles launches weredivided.

Japan and the US considered North Korea’s launches a serious threat to their respective

national security and immediately proposed to the UN Security Council a resolution imposing
sanctions under Chapter 7 of the UN Charter.

Japan was particularly active in UN diplomacy.

China and Russia, on the other hand, strongly opposed the adoption of a resolution to impose
sanctions and indicated that they might exercise a veto to kill such a resolution, although bothcountries did express “serious regrets” regarding the actions taken by North Korea.

Finally, acompromise was made, and UN Security Council Resolution 1695 was unanimously adopted on
July 15, 2006, after eliminating the reference to Chapter 7 of the UN Charter.

However, North Korea refused to accept this resolution 45 minutes after its adoption, andsuggested the possibility of launching more missiles.

Regarding a return to the Six-Party Talks,

North Korea has not withdrawn its condition that the US lift its financial sanctions.

－2－

These events showed that there is a polarization of opinion concerning security issues in Northeast
Asia, with Japan and the US at one end and China and Russia at the other.

It should be notedthat South Korea’s current administration, increasingly leaning towards an anti-Japan stance,
has adopted a pro-China posture.

On the other hand, it is noteworthy that five of the countries in

the Six-Party Talks (excepting North Korea) do share a consensus that the Talks should be used asa forum for discussing the security of the Korean Peninsula, including North Korea’s nuclear
program and missile issues, and that they agreed to continue requesting that North Korea returnto the Six-Party Talks.

Should the Six-Party Talks resume and there is substantive discussion in the future, these Talks
could significantly contribute to the stability and the security of Northeast Asia.

If North Korea

does not return to the Six-Party Talks in the near future, the other five countries may hold ameeting among themselves.

If that occurs, these “Five-Party Talks” could become a practicalmechanism for regional security dialogue.

Japan, which has always stood on the sidelines during

the Six-Party Talks, would be challenged to proactively address regional security issues such asarms control, disarmament and non-proliferation with regard to nuclear weapons and ballistic
missiles.

3.

Promoting Japan-led “Dissuasion Diplomacy”

While North Korea’s motivation and intention for the recent ballistic missile launches is still
unknown, it may be a response to US “financial sanctions” and an attempt to force the US to holddirect talks with North Korea.

It is also considerd that the intention of the launches included

missile development tests, military exercises regarding launches, or a demonstration to show thecapabilities of North Korea’s operational ballistic missiles.

In relation to this, Christopher R. Hill,

the US Assistant Secretary of State for East Asian and Pacific Affairs, testified on July 20, 2006
before the Senate Foreign Relations Committee that personnel from Iran observed North Korea’s
missile launches.

Iran has reportedly received technological assistance related to ballistic

missiles from North Korea.

For Japan, North Korea’s missile tests provides an opportunity to recognize that proliferation ofballistic missiles to states and even to non-state actors such as international terrorists is a serious
problem.

It will be important to reinforce cooperation on concrete actions to prevent proliferation

not only with Northeast Asian but also Middle Eastern, Southwest Asian and Southeast Asian
countries.

It is worth noting that the Chairman’s Press Statement for the ASEAN Post

Ministerial Conference (PMC) of July 27, 2006, referred to the North Korean issue: “[T]he－3－

Meetings strongly urged the DPRK to refrain from any action that might aggravate tension,
return immediately to the Talks without preconditions, and work towards the expeditious
implementation of the 19 September 2005 Joint Statement as was unanimously agreed upon inthis Resolution.”

Japan played a key role in the adoption of the UN Security Council resolution on North Korean
missile launches.

On the same day as the North Korean missile launches, the Security Council ofJapan decided to implement countermeasures, including a prohibition on port entry by the North
Korean vessel Man Gyong Bong for six months, and a ban on entry by North Korean governmental
officials.

The UN Security Council Resolution stipulates that the Council “[r]equires all Member States…to
exercise vigilance and prevent missile and missile-related items, materials, goods and technology
being transferred to DPRK’s missile or WMD programs” and “to exercise vigilance and prevent the
procurement of missiles or missile related-items, materials, goods and technology from the DPRK,
and the transfer of any financial resources in relation to DPRK’s missile or WMD programs.”
Since North Korea refused to accept the UN Security Council Resolution, Japan decided in
September 2006 to further implement financial sanctions and more strict export controls against
North Korea under the Foreign Exchange and Foreign Trade Control Law.

The financial

sanctions involve freezing assets that belong to 15 organizations and one individual listed as being
suspected of involvement in North Korea’s development of nuclear weapons and missiles.

In

regard to the further strengthening of export controls, Japan is considering revising its Foreign
Exchange and Foreign Trade Control Law to require that companies report the export destinationsof approximately 40 items that could be used in the development of weapons of mass destruction
and missiles.

This revision will designate certain domestic companies that have traderelationships with North Korea as companies connected with a sanctioned country and put themunder obligation to report these export items and their destinations, even if not North Korea, toprevent any possibility of roundabout exports to North Korea.
essential to make such measures effective.

International cooperation isJapan must make every effort to appeal to other UN

member countries so that the international community will adopt similar measures for preventing
North Korea from developing and trading missiles.

The threat of ballistic missiles to Japan comes not just from North Korea.

To stabilize thesecurity environment of Northeast Asia, Japan must promote “dissuasion diplomacy.”Japanshould also take the initiative in establishing a regional framework for discussing arms control,
disarmament and non-proliferation of nuclear weapons and ballistic missiles, and for persuading－4－

countries of concern through bilateral meetings.

Japan, as the President of the UN Security

Council, expressed “deep concern” immediately after North Korea’s declaration of its intent to
conduct nuclear tests (October 6, 2006), and successfully led the Security Council to adopt
Resolution 1718 (October 14, 2006), which imposed economic sanctions under Chapter 7, Article 41of the UN Charter.

This development undoubtedly demonstrated Japan’s capability in dissuasion

diplomacy, and may be the result of Japan’s dissuasion diplomacy initiatives following North
Korea’s ballistic missile launches in July 2006, in addition to other diplomatic efforts such as
Prime Minister Shinzo Abe’s visits to China (October 8, 2006) and South Korea (October 9, 2006).

4.

Significance of Developing “Deterrence Posture”

When North Korea launched its missiles July 2006, Japan had no system capable of intercepting
ballistic missiles.

However, since Japan was in the process of developing such systems, it wasable to successfully detect and track some of the North Korean missiles in cooperation with the US.
Japan’s capabilities to obtain such precise information on a timely basis were an important factor
that allowed Japan to take a proactive and crucial role in “dissuasion diplomacy” at the UN
Security Council.

After the detection of North Korea’s preparations for launching a Taepo Dong 2, several countries,
including China, had attempted to dissuade North Korea from actually launching, but North
Korea did not heed the requests of these countries.

One would argue that the fact that both

Japan and the US had yet to possess the capability for intercepting ballistic missiles coming
toward Japan might have been a factor in North Korea’s decision to launch the missiles.

However,even if Japan and the US had such an effective capability, the missiles would not have beenintercepted because their impact areas were far from Japanese or US territory.

Since North

Korea did not have the intention of attacking Japan or the US, it was unlikely that the US would
have attempted preemptive strikes on North Korean missile launchers.

North Korea might have thought that launching ballistic missiles would let them achieve political
purposes, and that Japan and the US would not implement strong countermeasures.

However,

its attempts failed partly because both Japan and the US clearly adopted steadfast postures of notyielding to countries trying to achieve their goals by intimidation.

Such postures were strongly

reflected in their subsequent diplomacy. Although Japan and the US could not prevent North
Korea’s missile launches, it is important to note that both countries set the precedent that strong
measures would also be taken if similar events were to occur in the future.

In order to conduct

effective diplomacy without yielding to intimidation, “power” is still imperative in the current
international community.

Japan’s development of deterrence by denial is essential in terms of－5－reinforcing its diplomatic power.

If Japan develops deterrence by denial that includes capabilities for offensive defense, active
defense and passive defense, such reckless acts by North Korea may be deterred more effectively.
North Korea may be forced to realize that it cannot achieve expected outcomes through using or
threatening to use ballistic missiles, and be dissuaded from conducting such an attack.

Here lies

the significance of Japan developing its “deterrence posture.”

Japan’s introduction of BMD systems, as well as the start of serious discussions on possessing asurgical strike capability against opponents’ ballistic missile bases as offensive defense, haveundoubtedly made Japan’s “dissuasion diplomacy” more effective.

One reason why China

strongly opposed the proposed UN resolution to sanction North Korea at first was that China
wanted to demonstrate its influence over North Korea and hoped to get some favorable response.
However, North Korea unexpectedly did not respond to China.

As the same time, China

encountered time pressure from the G8 Summit in St. Petersburg and the US-China summit.
Under such situations, China may have been concerned that, if the situation surrounding North
Korea’s ballistic missile launches worsened, Japan might adopt more active security policies andaccelerate building up its deterrence by denial capability, including the capability to launch
surgical strikes against missile bases.

Thus China wanted to resolve the issue quickly, andagreed to the UN Security Council resolution that strongly condemned North Korea, but did so
without sanctions.

5.

Early Development of “Defense Capability”

When North Korea launched Taepo Dong 2 on July 5, 2006 (JST), the US was prepared tointercept it using its GMD interceptors, should it fly close to the US homeland.

In the end the

Taepo Dong 2 did not even fly over the Japanese archipelago, so there was no need for the US tolaunch interceptors.

In addition, the US had mobilized Aegis destroyers, RC-135S “Cobra Ball” electronic
reconnaissance aircraft, the missile monitoring ship “Observation Island”, the X-band radar
located at Shariki Air Self Defense Force Base in Aomori Prefecture in Japan, as well as early
warning satellites (DSP).

Japan mobilized the FPS-XX radar, which had been only used for tests

and was not yet fully operational, Aegis ships, EP-3C and YS-11E electronic intelligence aircraft,and P-3C patrol planes.

Thereby both countries set up a multi-layered system ready to track

ballistic missiles launched by North Korea.

In other words, they had mobilized almost all theirmonitoring capabilities at that time.

－6－

In reality, however, the Japan-US joint operation for ballistic missile defense was found not to be
fully developed, especially in regard to establishing a Common Operational Picture (COP) andother issues related to information exchange, interoperability, and peacetime cooperation andoperational coordination between Japan’s Self-Defense Forces and US Forces.

Therefore, there isneed for review and improvement, especially in the areas of “information sharing” and“coordination of operations.”

It will be a future challenge for Japan to seek full development of aJapan-US joint operational system that can defend Japan against ballistic missile attacks.

After the North Korean missile launchings, Director-General Nukaga emphasized the need forearly deployment of Japanese BMD systems, stating that the government would review thepossibility of front-loading the buildup plan.

For example, the Japanese government willconsider earlier acquisition of Patriot PAC-3 (to be acquired by the end of FY 2006) and the Aegis
BMD system (first vessel to be acquired by the end of FY 2007).

Earlier deployment of the entire

BMD system, which is currently planned for FY 2011, will also be considered.

Furthermore, thegovernment will review the possibility of moving up the deployment of FPS-XX radars and otherradar networks.

The US Navy has deployed Aegis LRS&T destroyers (without interception capability) to the Sea ofJapan since March 2004.

In accordance with the decision of the Japan-US Security Consultative

Committee (SCC or “2+2”), the US also deployed Aegis BMD cruisers equipped with interceptor
missiles (SM-3) to the US Navy base at Yokosuka in August 2006.

US Forces also deployed an

X-band early warning radar to Shariki ASDF Base in Aomori in June, and a PAC-3 unit to the
USAF base at Kadena, Okinawa by late 2006.

Needless to say, smooth joint operations are required between the Japanese and US BMD systems,
and the procedures for ensuring such should be determined in detail.

During his visit to Moscow

in January 2006, Director-General Nukaga emphasized the importance of developing capabilities
to detect ballistic missiles launches as quickly as possible, track the missiles accurately, andrespond effectively.

He also noted the necessity of developing monitoring systems that link

Japan’s ground-based radar network, Aegis ships, the JADGE system, early warning satellites,
and US radar networks.

Nukaga then revealed a plan to develop an integrated information

network for Japanese and US ballistic missile defense.

The assets listed above that were deployed by US forces for monitoring the North Korean missile
launches on July 5 were under the control of the US Pacific Command (PACOM) located in Hawaii.

－7－

However, the Japan Self-Defense Force’s counterpart is the Headquarters of US Forces in Japan.
Such an arrangement risks failure to share information, confusion, and delays in joint operations.
The North Korean missile launches offer the lesson that Japan and the US need to fully coordinate
regarding the positioning of US Forces in Japan and the development of operational procedures forJapan-US joint ballistic missile defense as soon as possible.

Joint exercises and training will help

reinforce lessons learned.

Electronic intelligence collection activities carried out by EP-3Cs of the Maritime Self-Defense
Force and YS-11Es of the Air Self-Defense Force undoubtedly contribute to collecting andanalyzing intelligence related to North Korea’s ballistic missile activities, detecting launch
indications, and maintaining the alert status of deployed units.

The development of an

intelligence collection system to support the operations of weapons systems is essential for thenational security of Japan.

It is expected that Japan will further develop intelligence collection

capabilities for ballistic missile defense, including the possible introduction of aircraft such as US
RC-135s for collecting data regarding missile launches.

However, airborne systems alone have operational limitations, so it is necessary also tocontemplate the possible introduction of early warning satellites, and further reinforce human
intelligence collection.

Japan intends to seriously review the issue of the peaceful use of space,and in that context the possibilities for acquiring satellite-based capabilities to monitor ballistic
missile activities has been discussed.

If Japan were to possess the capabilities to detect ballistic

missile launches and track the missiles immediately after launch, this would contribute to theoperation of the BMD system as “active defense” as well as to appropriate implementation of“passive defense,” including the protection of citizens and “damage confinement”.

6.

Growing Discussion on the Possession of “Denial Power”

Since the North Korean missile launch in July 2006, there has been growing discussion in Japan ofacquiring an “offensive defense” power that would allow Japan to perform surgical strikes against
an opponent’s ballistic missile bases.

On July 9, 2006, Director-General Nukaga stated that, “If it

is necessary for protecting citizens, it is natural for Japan as an independent state to consider
having a minimum capability, within a certain framework” and acknowledged the need to start
examining the possibility of acquiring counterattack capability.

Shinzo Abe, then Cabinet

Secretary, also asserted the need to develop a plan for counterattacks on ballistic missile bases
within the framework of the Japan-US alliance.

While some have expressed opposition to “offensive defense,” they have not necessarily－8－

distinguished between “preventive attacks,” “preemptive attacks” and “counterattacks,” and haveargued that Japan should not even adopt the options of “preemptive attack” and “counterattack”
both of which fall under the right to self-defense.

They may have also confused “preemptive

attacks,” which would be taken when there is a clear case of imminent attack, with the“preemptive actions” that the Bush administration has indicated would involve preventive attacks.
Moreover, even those who expressed approval for the “preemptive attack” and “counterattack”
concepts seemed to lack concreteness in discussing the required conditions for such attacks.
Discussions in Japan about attacking enemy ballistic missile bases are still premature.

Nevertheless, it is significant that discussions about attacking enemy ballistic missile bases havebeen presented to the Japanese public following the North Korean missile launches.

The next

step would be to review exactly how to acquire the necessary offensive defense capabilities against
ballistic missile attacks through consideration of various issues.

Consideration must be given to

the international situation, the enemy’s expressed intent, and the characteristics of the enemy’sballistic missiles as well as one’s own offensive defense capabilities.

It will also be important todistinguish between “preventive attacks” that are not recognized as part of the right of self-defense
under current international law, and “preemptive attacks” and “counterattacks” which arerecognized as such.

When discussions about counterattacks arose in Japan, China and South Korea immediately
expressed concern. For example, a spokesperson from the South Korean Office of the President
stated that the comments of Japanese ministers on counterattacks were challenging to the peaceand stability of Northeast Asia and could not be tolerated.

He further said that such remarks on

preemptive attacks were dangerous and reckless and would further escalate the crisis on the
Korean Peninsula, and that South Korea would strongly oppose attempts by Japan to become agrowing military power.

However, no Japanese minister actually discussed “preemptive actions” or “preemptive attacks,”
but merely noted what kinds of “counterattacks” are possible.

Therefore, the comments fromSouth Korea, which certainly has sufficient capability to “counterattack” against North Korea, is
not persuasive at all and seemed merely to have some political intent.

Still, if Japan does decideto acquire offensive defense capabilities, neighboring countries would likely show their opposition
to such actions from political motives.

If Japan does not clearly describe its concept for thepossession of offensive defense capabilities to attack ballistic missile bases, then this would
deteriorate the security situation around Japan.

It is imperative to make considerable efforts inorder to establish confidence among countries in the region, and abate their concerns.

－9－

7.

Issues Concerning “Damage Confinement”

North Korea’s ballistic missile launches in July 2006 also revealed the problem of delays incommunicating information from the central government to local governments in Japan.

While

Japan has been developing a “citizen protection system”, it was about three hours after the firstmissile launch before facsimile transmissions of this information were sent to the prefectural
governments.

It can be said of the Japanese government as well as the Japanese public as awhole that, despite increased interest in ballistic missile defense, issues related to the protectionof citizens and “damage confinement” (passive defense and consequence management) draw lessattention.

Since the ballistic missiles North Korea launched this time landed in the Sea of Japan near the
Primorye Province of Russia, they did not cause any damage.

However, Japan needs to review

this case, and develop preparedness as soon as possible to deal with a future case in which missiles
might land in Japanese territory.

There will need to be procedures in place to declare warnings

immediately, request emergency evacuation, keep citizens well-informed of necessary actions,establish coordination between the Self-Defense Forces, police forces, fire services, and the coast
guard, and carry out operations by central and local governments and public corporations.

8.

Establishing Robust and Effective Ballistic Missile Defense

Undoubtedly, the Japan-US relationship will be further strengthened through the development ofJapan’s ballistic missile defense system.

Creating a framework within which mutuallycomplimentary relationships can be built between Japan and the US at all levels is a challenging
but extremely important task for Japan’s public and private sectors.

Japan has been attempting to accelerate the development of its BMD system.
that Japan faces come not only from ballistic missiles.

Yet the threats

This means that Japan needs to procure avariety of defense-related systems and that there needs to be a balance in their acquisition.
Depending on developments in the security environment surrounding Japan, there may be a needto shift procurement focus to other capabilities in addition to the BMD system.

In this case, thedefense budget may need to be increased to allow acquisition of all needed defensive equipment.
Considering the tense situations on the Korean Peninsula and in the Taiwan Strait as well as the
rapidly modernizing and growing military power of China whose investment in defense has grown
10% per year for the last 18 years, there seems to be a growing need for Japan to increase its
defense budget.

－10－

If the defense budget is not increased, then other expenses, such as the realignment of US Forces
in Japan, could squeeze the budget for ballistic missile defense, resulting in the delay of BMD
system development.

This could also weaken the industrial and technical infrastructure ofJapanese ballistic missile defense.

Moreover, this would delay the development of a truly“multi-functional, flexible and effective” defense capability in Japan, which was set as a goal of
defense build-up in the new National Defense Program Guideline.

The security environment surrounding Japan does not allow for an optimistic view, due to Japan’s
closeness to the Korean Peninsula and the Taiwan Strait.

Thus, to maintain peace and prosperity,

Japan needs to secure a sufficient defense budget to strengthen deterrence including, but notlimited to, ballistic missile defense. It is time for the Japanese government to make serious
efforts to obtain the understanding of the Japanese people about the appropriateness of increasing
the budget for national defense, and for the immediate deployment of “offensive defense,” “active
defense” and “passive defense” capabilities related to BMD.

－11－

Part 1

Responding to Missile Threats

Chapter 1
1.

Missile Threats and Responses by Specific Countries

Threats of Missile Attacks

A ballistic missile is “a generic term for missiles which are launched into outer space by rocket
propulsion and use inertia to fly a ballistic trajectory through space.”1

There are several ways toclassify ballistic missiles, but the most popular classification is the one using missile range.
Missiles with a range shorter than 500 km are called Short Range Ballistic Missiles (SRBMs);
those with a 500- to 3,500-km range are called Medium-Range Ballistic Missiles (MRBMs); thosewith a 3,500- to 5,500-km range are called Intermediate-Range Ballistic Missiles (IRBMs); andthose with a 5,500-km or greater range are called Long-Range Ballistic Missiles (LRBMs).
LRBMs launched from the ground are called Intercontinental Ballistic Missiles (ICBMs).

In

addition to ground-launched ballistic missiles, there are ballistic missiles launched fromsubmarines (Submarine-Launched Ballistic Missile, or SLBMs) and from aircraft (Air-Launched
Ballistic Missile, or ALBMs).

So far, there has not been any actual deployment of ALBMs.

Some ballistic missiles can be loaded with not only conventional warheads but also with weaponsof mass destruction (WMD), that is, nuclear, biological, or chemical warheads.

As ballistic

missiles that can be used to carry such WMD are relatively low in cost compared to otherconventional weapon systems with equivalent capability, they tend to proliferate all over the world,
especially in regions with frequent conflicts. At least 47 countries are said to possess ballistic
missiles and, of these, the five nuclear-weapon states (the US, Russia, the UK, France and China)
as well as India, Iran, Israel, North Korea, Pakistan, and Saudi Arabia possess missiles withranges of 1,000-km or greater.

Only the US, Russia and China deploy ICBMs, and all fivenuclear-weapon states deploy SLBMs.

Ballistic missiles are difficult to defend against because

they fly long distances at very high altitude and velocity.

Therefore, ballistic missiles have highmilitary value as an effective method to attack hostile territory from a remote place.
some countries even regard ballistic missiles as a symbol of national power. 2

Moreover,The ballistic

missiles discussed above are all for ground attack, but the emergence of theater ballistic missiles(TBM) that can attack vessels such as aircraft carriers by using Maneuverable Re-entry Vehicle

Disarmament, Non-Proliferation and Science Department, Ministry of Foreign Affairs (ed.), Japan’s
Disarmament and Non-Proliferation Policy (3rd edition), Ministry of Foreign Affairs of Japan, 2006, p. 214 (in1Japanese).
2 Andrew Feickert, “Missile Survey: Ballistic and Cruising Missiles of Selected Foreign Countries,” CRS
Report for Congress, RL30427 (Updated July 26, 2005), p. 5.

－13－

(MaRV) is also expected.3

A cruise missile, on the other hand, is defined as “a missile with wings that uses intake propulsion
to fly at a certain altitude and velocity until it reaches the target.”4

Unlike ballistic missiles,

cruise missiles fly through the atmosphere under their own power, using a built-in guidancesystem to reach their targets. Also, cruise missiles are much smaller than ballistic missiles andhave excellent stealth features, in addition to their extremely low flying altitude, to defy various
sensors such as radars.

Cruise missiles equipped with the latest precision navigation andguidance systems, such as US Tomahawks, have dramatically improved accuracy; thus many
countries have increased interest in the possession and expansion of cruise missile capabilities.

More than 80 countries possess cruise missiles; among them 18 can produce such missiles.
Cruise missiles can be classified by target type, such as Anti-Ship Cruise Missiles (ASCMs) andLand Attack Cruise Missiles (LACMs), or by launcher type, such as Air-Launched Cruise Missiles(ALCMs) and Surface-Launched Cruise Missiles (SLCMs).

There are over 100 types of cruise

missiles, including derivatives, with 70,000 to 80,000 deployed worldwide.

If these missiles are loaded with WMD, they can be “absolute weapons” that can cause enormous
damage unless there are effective defense measures.

They can be even greater threats tocountries like Japan with concentrations of population, key infrastructure and assets in a narrowterritory.

In addition, there are growing concerns of non-state actors such as international terrorist groups
attaining and using WMD and missiles.

Biological and chemical weapons do not require

advanced technologies to manufacture, so that international terrorist groups can produce such
weapons if they obtain the necessary knowledge and facilities.

If non-state actors obtainweapon-grade fissile materials, especially highly enriched uranium, they may even be able tomanufacture rudimentary nuclear weapons.

The US, in particular, has grave concerns about thepossibility of “rogue states” supplying WMD or related materials for their production to non-state
actors.

Another concern is the possibility of a coup d’état in a country possessing WMD thatwould hinder the control of such weapons and risk their outflow to international terrorist groups.
Moreover, there are also concerns that international terrorist groups may load SRBMs or cruise

For example, see Ronald O’Rourke, “China Naval Modernization: Implications for U.S. Navy
Capabilities—Background and Issues for Congress,” CRS Report for Congress, RL33153 (November 18, 2005),
p. 5
4 Disarmament, Non-Proliferation and Science Department, Japan’s Disarmament and Non-Proliferation
Policy, p. 211 (in Japanese).
3－14－

missiles onto container ships to launch against a target country’s coastal areas.5

2.

Background of Ballistic Missile Defense

At the end of World War II, the first ballistic missile V-2 rockets developed by Germany
demonstrated the ability to attack the United Kingdom from German territory.

The attacks

highlighted the technical difficulty of intercepting ballistic missiles falling from an extremely highaltitude at a great velocity.

The United States concerned that the emergence of such ballistic

missiles might negate its geo-political and strategic advantage of being isolated from the Eurasiancontinent.

It began to develop ballistic missiles, and, at the same time, to study defensive

measures to counter ballistic missile attacks.

However, ballistic missile defense not only

presented technical difficulties, but also faced political barriers to its development, especiallyduring the Cold War.

At that time, there were persistent and strong arguments that thedevelopment of ballistic missile defense might threaten mutual deterrence between the US andthe Soviet Union, thereby being detrimental to the stability between the two superpowers.

This situation changed considerably after the end of the Cold War.

While the confrontational

relationship between the US and the Soviet Union had ended, WMD and ballistic missiles had
proliferated throughout the Third World, and were recognized as a serious threat to the US andregional countries.

The US was made keenly aware of the need for ballistic missile defense by the

Gulf War of 1991. At that time, Iraq launched missile attacks using conventional warheads
against multinational forces as well as Saudi Arabia and Israel. Although the damage caused by
the missile attacks was limited, the US was forced to exert much effort in the search anddestruction of Iraqi ballistic missiles and their mobile launchers.6

On the other hand, the US used its Patriot Advanced Capability-2 (PAC-2) missiles, originallydesigned for use against aircraft, in response to Iraqi ballistic missile attacks.

While PAC-2

interception rates were much lower than first thought,7 the deployment of PAC-2 provided asignificant political and psychological effect in restraining Israel from retaliating against Iraq.

The US thus reconfirmed the threat of ballistic missile proliferation to US forces deployed forSee, for example, United States of America, The National Strategy for Maritime Security, September 2005,
p. 8.
6 See W. Andrew Terrill, “The Gulf War and Ballistic Missile Proliferation,” Comparative Strategy, Vol. 11, No.
2 (1992), pp. 166-169.
7 See John Conyers, Jr., “The Patriot Myth: Caveat Emptor,” Arms Control Today, Vol. 22, No. 9 (November
1992). Theodore A. Postol and Robert M. Stein had an intense debate on the Patriot’s interception rate. See
Theodore A. Postol, “Lessons of the Gulf War Experience with Patriot,” International Security, Vol. 16, No. 3(Winter 1991/92), pp. 119-171; Robert M. Stein and Theodore A. Pistol, “Correspondence: Patriot Experiencein the Gulf War,” International Security, Vol. 17, No. 1 (Summer 1992), pp. 199-240.
5－15－

regional conflicts, and re-emphasized the need for ballistic missile defense to ensure US influenceand protect the military operations of the US and its allies.8

Compared with the Soviet Union

during the Cold War, there seem higher probabilities that Third World countries would actually
use ballistic missiles, so the US and its allies, such as Japan, are pressed to develop a ballistic
missile defense system.

Although there still exist technological barriers, achievement attained

especially through research and development under the Strategic Defense Initiative (SDI)
promoted by the Reagan administration during the Cold War provided the foundation for abreakthrough in the feasibility of ballistic missile defense.

The ballistic missile defense first planned during the US-Soviet confrontation of the Cold War era
has been developed with the main purpose of defending the US homeland, US forces deployedoverseas and US allies and friends against ballistic missile attacks from Third World countries,
especially rogue states, after the Cold War.

3.

US Ballistic Missile Defense Initiatives

1)

ABM

The US began to study ballistic missile defense during the final stages of the Second World War,and intensified such studies upon the Soviet launch of Sputnik in 1957 and its acquisition of
ICBMs that could reach the US homeland from Soviet territory.

To defend their homelands fromstrategic ballistic missile attacks, both the US and the Soviet Union pursued the development of
Anti-Ballistic Missiles (ABMs) that could destroy enemy nuclear warheads by exploding the ABMs’
nuclear warheads in the vicinity of the attacking missiles.
in 1958, and Nike-X in 1963.

The US started to develop Nike-Zeus

However, both the Eisenhower and Kennedy administrations wererather cautious in their actual deployment.

The Soviet Union, on the other hand, deployed ABMs

with nuclear warheads near Moscow.

The Johnson administration renamed the Nike-X Sentinel and decided to deploy them in
September 1967.

The purposes of this deployment were to pressure the Soviet Union to engage inarms control negotiations on strategic weapons, and to answer the calls of proponents of ABM in
Congress.

The Nixon administration then announced in March 1971 that it would discontinue

the deployment of Sentinels, but would deploy a Safeguard ABM system to defend ICBM bases.
The Safeguard system would consist of two types of interceptor missiles ― Spartans to intercept
missiles in outer space and Sprints to intercept them in the atmosphere.

This announcement

reflected the strong intent of the US to utilize ABM as a bargaining chip in the Strategic Arms
8

Thomas G. Mahnken, “The Arrow and the Shield: U.S. Responses to Ballistic Missile Proliferation,” The

Washington Quarterly, Vol. 14, No. 1 (Winter 1991), p. 199.

－16－

Limitation Talks (SALT) then ongoing with the Soviet Union.

In June 1972, the US and the Soviet Union concluded the ABM Treaty in which each side agreed tolimit the number of its interceptor missiles to 100; to have one limited ABM system to protect its
capital and another to protect an ICBM launch area (reduced to one site in 1974); and to prohibit
the development and deployment of ABM systems except fixed land-based systems.

The US

started to operate its Safeguard system at its ICBM base in North Dakota in October 1975.
However, in February 1976, it discontinued operation since the system required the detonation of
nuclear warheads within US territory and was considered ineffective in terms of cost andtechnology.

From that time, the US down-scaled its ballistic missile defense program, but

continued to study interception methods that could neutralize nuclear warheads without using
nuclear warheads for interception.

2)

SDI and GPALSIn March 1983, President Reagan directed “a comprehensive and intensive effort to define along-term research and development program to begin to achieve our ultimate goal of eliminating
the threat posed by strategic nuclear missiles.”9Defense Initiative (SDI).

Later this program was named the Strategic

In December 1984, he also stated that “in the long-term, … SDI will bea crucial means by which both the US and the Soviet Union can safely agree to very deep
reductions, and eventually, even the elimination of ballistic missiles and the nuclear weapons they
carry.” 10

On the other hand, it was pointed out that to attain such purposes, it would benecessary to reinforce air and civil defense systems, as well as strengthen non-nuclear forces in
addition to ballistic missile defense.11

The SDI aimed to achieve Multi-Layered Defense, which would intercept Soviet strategic missiles
at various phases of ballistic missile flight, i.e. the boost phase, the post-boost phase, themid-course phase, and the terminal phase, by interceptor systems deployed on the ground and inspace as well as onboard aircraft.

Interception at boost phase was later nicknamed “Star Wars,”since it emphasized the need to launch interceptor weapons into space.

In addition, research and development was pursued on directed energy weapons using lasers and9 Ronald Reagan, “Address to the Nation on Defense and National Security,” March 23, 1983. For the
analysis of this speech, see Gordon R. Mitchell, Strategic Deception: Rhetoric, Science, and Politics in Missile
Defense Advocacy (East Lansing, Michigan: Michigan State University Press, 2000), pp. 52-56.
10 Ronald Reagan, “Foreword Written for a Report on the Initiative, December 28, 1984.”
11 See Leon Sloss, “The Strategist’s Perspective,” Ashton B. Carter and David N. Schwartz (eds.), Ballistic
Missile Defense (Washington D.C.: Brooking Institution, 1984), p. 46.

－17－particle beams, and kinetic energy weapons that would destroy ballistic missiles and theirwarheads by a direct hit.12

According to the SDI deployment plan issued in September 1986 by

the Strategic Defense Initiative Office (SDIO), the first phase of SDI deployment would include
several hundred launchers in space for kinetic energy weapons, and several hundred to several
thousand ground-based interceptor missiles in order to deter Soviet preemptive attacks against
US ICBMs.13

SDI caused a sensation both in and outside the US.

The reasons were not only that SDI would

require a huge budget and that its feasibility was doubtful given the technology at that time but
also that, if realized, it would have the potential to radically change the US and the Soviet
deterrence postures, which relied on a balance of offensive forces.

[See Chapter 9 of this book.]Thus SDI provoked extensive argument on whether it would or would not benefit strategic
stability between the US and the Soviet Union, and whether it would infringe upon the ABM
Treaty.

It had a significant impact on the direction of strategic nuclear arms control negotiations.

On the other hand, we must not overlook the strategic significance of SDI.

At the very least SDI

undoubtedly induced the Soviet Union to enter nuclear arms control negotiations.

Moreover, SDI

was one of the factors that led the Soviet Union to give up confrontation with the US and bring an
end to the Cold War.14

The first Bush Administration indicated its intent to pursue SDI.15

In the “first phase” of SDI

re-defined in 1990, the plan was to deploy 4,600 Brilliant Pebbles (space-based kinetic energy
weapons) and 1,000 to 2,000 ground-based interceptor missiles. 16

However, the first Bush

Administration was not necessarily eager to actively promote SDI, and Congress also tried to slow
SDI by drastically cutting funding for the space-based interceptor system.

Behind these actions

were the end of the Cold War and a significant reduction of the threat of massive nuclear attack

12 For the interception system planned in SDI, see Stephen Weiner, “Systems and Technology,” Carter and
Schwartz, Ballistic Missile Defense, pp. 49-97; Michael May, “Technical Feasibility of the SDI,” Samuel F.
Wells, Jr. and Robert S. Litwak (eds.), Strategic Defenses and Soviet-American Relations (Cambridge,
Massachusetts: Ballinger Publishing Company, 1987), pp. 125-140.
13 Regarding the summary of “the first phase” of SDIO, see Ballistic Missile Defense Organization,
Department of Defense, Harnessing the Power of Technology: The Road to Ballistic Missile Defense from
1983-2007, September 2000, pp. 22-25.
14 Former Foreign Minister of the Soviet Union Aleksandr Aleksandrovich Bessmertnykh stated that the endof the Cold War was brought about by President Reagan’s SDI. See The Sankei Shimbun, March 1 1993 (inJapanese). On the other hand, there were some criticisms of such a view. See, Mitchell, Strategic Deception,
pp. 87-93 for the summary of those argument.
15 George H. W. Bush, “Address on Administration Goals before a Joint Session of Congress,” February 9,
1989.
16 Tetsuya Umemoto, “Development of National Missile Defense” Satoshi Morimoto (ed.), Missile Defense:
The New Structure of International Security (Tokyo: Japan Institute of International Affairs, 2002), p. 40 (inJapanese).

－18－

against the US because of improved US-Soviet relations.

On the other hand, regional conflicts contained during the Cold War were re-emerging withincreasing frequency and intensity.

Some Third World countries that would be involved in suchconflicts possessed chemical and biological weapons as well as ballistic missiles to carry them.
Thus, the US perceived that it would need to defend its forces from ballistic missiles if it were tointervene in regional conflicts.

In 1991, the same year as the Gulf War, the US passed the Missile

Defense Act, which set a US goal of deploying an effective ballistic missile defense system against
limited strategic ballistic missile attacks, while maintaining the strategic stability.

This Act

stipulated that the US should develop, by fiscal 1996, a ballistic missile defense system that would
not violate the ABM Treaty, and that the President should ask the Soviet Union to revise the ABM
Treaty.

The State of the Union Address by President Bush in January 1991 directed that “the SDI
program be refocused on providing protection from limited ballistic missile strikes, whatever theirsource.”17This ballistic missile defense program was named “Global Protection Against Limited

Strike” (GPALS).

GPALS planned to deploy 24 Brilliant Eyes satellites with warning andguidance systems, about 1,000 Brilliant Pebbles, a Theater (later renamed to “Terminal") High
Altitude Area Defense (THAAD) system, and 500 to 1,000 Patriot Advanced Capability-3 (PAC-3)
ground-based interceptors.

The main purpose of GPALS was to defend against ballistic missiles

used by Third World countries, as well as accidental or unauthorized launches of ballistic
missiles.18

3)

TMD and NMD

The Clinton Administration started to review ballistic missile defense policies shortly after coming
into office in 1993.

To confront new post-Cold War threats, it placed priority on Theater Missile

Defense (TMD) to defend US forces deployed abroad as well as allies and friends from ballistic
missile attacks.

Following TMD, the next priority was given to National Missile Defense (NMD)

to defend the US homeland.

The Clinton Administration announced that SDIO would be

reorganized as the Ballistic Missile Defense Office (BMDO), and determined that the focus of
BMDO would be shifted from space-based to ground-based and sea-based plans.19

This policy of

17 George H. W. Bush, “Address Before a Joint Session of the Congress on the State of the Union,” January 29,
1991.
18 For a summary of GPALS, see Ballistic Missile Defense Organization, Department of Defense, Harnessing
the Power of Technology: The Road to Ballistic Missile Defense from 1983-2007, September 2000, pp. 25-28.
19 Les Aspin, “The End of the Star Wars Era,” Department of Defense News Briefing, Office of the Assistant
Secretary of Defense, May 13, 1993 [http://www.fas.org/spp/starwars/offdocs/d930513.htm].

－19－

prioritizing TMD continued until the middle of 1998.

The Clinton Administration’s TMD program was structured on the altitude and deployment ofballistic missile interceptors.

In terms of interception altitude, there was lower-tier defense tointercept missiles within the atmosphere at altitudes of 100 km or below, and upper-tier defense
for interception in the upper atmosphere and outer space 100 km or higher.

Lower-tier defense was to use the PAC-3 missile, the Medium Range Extended Air Defense System(MEADS), and sea-based Navy Area Defense (NAD) to intercept ballistic missiles of less than
1,500 km range, as well as cruise missiles and aircraft.

The upper-tier defense system was tointercept ballistic missiles with ranges up to 3,500 km with ground-based THAAD and sea-based
Navy Theater Wide Defense (NTWD).

In addition, the TMD program included a system tointercept ballistic missiles at the boost phase using an Airborne Laser (ABL) system with laser
beams launched from aircraft, and boost phase interceptor missiles that would use kinetic energy
weapons.

The Clinton Administration program was divided into core programs for early deployment, andadvanced concepts to potentially complement the core programs.

The core programs would startwith PAC-3, THAAD, and NAD, with NTWD added from 1997.

The plan was to deploy PAC3

from 1998, THAAD from 2001, and NAD from 1999.

In 1997, however, the program was altered

to postpone deployments of PAC-3 to 1999, THAAD to 2004, and NAD to 2002.20

Ballistic missile defense policies were drastically changed in response to the “Rumsfeld Report” inJuly 1998.

This report clearly indicated that rogue states such as North Korea and Iran would

possess ballistic missiles capable of hitting the US homeland within about five years of a decision
to acquire such a capability while US intelligence community’s ability to provide timely andaccurate estimates of ballistic missile threats to the US was eroding.21

Immediately afterward, inAugust 1998, North Korea tested the Taepo Dong (1), an IRBM with a range of 2,000 to 4,000 km,
which flew over the north-eastern region of Japan.

The test evidently confirmed the Rumsfeld

Report and provided an opportunity for the US to review NMD’s priority.

On the Clinton Administration’s TMD program, see BMDO, 1994 Report to the Congress on Ballistic
Missile Defense, July 1994; BMDO, 1995 Report to the Congress on Ballistic Missile Defense, September
1995; BMDO, 1997 Report to the Congress on Ballistic Missile Defense, September 1997; Robert Shuey,“Theater Missile Defense: Issues for Congress,” CRS Issue Brief for Congress, IB98028 (Updated May 22,202001), pp. 1-9.
Members of the Commission to Assess the Ballistic Missile Threat to the United States, Executive
Summary of the Report of the Commission to Assess the Ballistic Missile Threat to the United States,
Pursuant to Public Law 201, 104th Congress, July 15, 1998 [http://www.fas.org/irp/threat/bm-threat.htm].

21

－20－

In addition to a changed recognition of threats, there were other factors driving the push for NMD.
Congressional Republicans were highly critical of the Clinton Administration’s inertia on NMD,
while the Democrats’ support for NMD had increased, and the administration’s reluctance topromote NMD was seen as placing the Democrats at a disadvantage for the 2000 election.
Therefore, the Clinton Administration decided to promote “limited” NMD.

The 1999 Defense

Report clearly stated that NMD should have a priority similar to that of TMD.22

The 1999

National Missile Defense Act stipulated that “[i]t is the policy of the US to deploy as soon as istechnologically possible an effective National Missile Defense system capable of defending theterritory of the US against limited ballistic missile attack (whether accidental, unauthorized, ordeliberate) with funding subject to the annual authorization of appropriations and the annual
appropriation of funds for National Missile Defense.”

The NMD program of the Clinton Administration was to deploy, phase by phase, a ground-based
mid-course NMD system that could intercept missiles using the impact of interceptors in outerspace.

Under this program, the first phase “Capability 1” would deploy 20 interceptor missiles in

Alaska by 2005, and then increase the number of interceptors to 100 by 2007 under “Capability 1
expansion.”In the “Capability 2” phase, the number of interceptors would be the same as for the“Capability 1 expansion” but X-band radar coverage would be increased by 2010, and in the“Capability 3” phase 260 interceptor missiles would be deployed to Alaska and Grand Forks (North
Dakota) by 2011.23

By the summer of 2000, the Clinton Administration was about to make a decision on NMD
deployment based on four criteria: threats, technological feasibility, cost, and effects on national
security, including arms control.

However, due to NMD test failures and the administration’slack of success in gaining Russian and Chinese acceptance of the NMD deployment, President
Clinton eventually said in September 2000, “I simply cannot conclude, with the information I have
today, that we have enough confidence in the technology and the operational effectiveness of theentire NMD system to move forward to deployment.

Therefore, I have decided not to authorize

deployment of a national missile defense at this time.” 24

William S. Cohen, Secretary of Defense, Annual Report to the President and the Congress, 1999
[http://www.defenselink.mil/execsec/adr1999/chap6.html].
23 Congressional Budget Office, “Budgetary and Technical Implication of the Administration’s Plan for
National Missile Defense,” CBO Paper, April 2000 [http://www.fas.org/spp/starwars/congress/2000_r/000425-cbo-nmd.htm].
24 “Remarks by the President on National Missile Defense,” Georgetown University, Washington, D.C.,
September 1, 2000 [http://www.ceip.org/files/projects/npp/resources/PresidentdelaysNMD.htm].
22

－21－

4)

MD

President Bush stated in his address of May 1, 2001 at the National Defense University that
Russia was no longer an enemy, and that the most imminent threat was attack from rogue statesusing weapons of mass destruction and ballistic missiles.

To respond to such new threats,

according to the speech, the US must abandon traditional deterrence relying solely on offensive
nuclear capabilities in favor of new concepts of deterrence that rely on both offensive and defensive
forces.

President Bush also stated that the US would need a new framework that allows it tobuild missile defenses, and must move beyond the constraints of the 30-year-old ABM Treaty.25

At that time, the Bush Administration removed the distinction between NMD and TMD inballistic missile defense and termed it Missile Defense (MD).

[Hereinafter, the ballistic missile

defense initiative of the Bush Administration will be termed “MD.”]The outline of the Bush Administration’s MD was disclosed through the Congressional testimony
of BMDO Director Ronald Kadish in July 2001. 26

Kadish first pointed out that the Bush

Administration would aim for layered defense to intercept hostile ballistic missiles at the boost,
mid-course, and terminal phases, using kinetic energy and directed energy MD systems deployedon sea, on land, in air and in space.

He further stated that the US would seek broader-ranged

activities in the assessment and development of MD technologies.

The most notable feature of the Bush Administration’s MD system is the division of the entire
system into three segments of interception ― boost, mid-course and terminal.

The system forthe boost phase includes kinetic energy and directed energy weapons; the core programs for kinetic
interceptors includes space- and sea-based missile systems.
ABL and the Space-Based Laser (SBL).

Directed energy systems include

For the mid-course segment, the main systems are theground-based interceptor that was central to the NMD program of the Clinton Administration,
and a sea-based system (Aegis BMD) that was renamed NTWD.

The terminal segment includes

PAC-3, THAAD and NAD.

The terrorist attacks of September 11, 2001 (9/11) clearly demonstrated the vulnerability of the US
homeland not only from longer-range ballistic missile attacks, but also from terrorist attacks using

25 George W. Bush, “Remarks by the President to Students and Faculty at National Defense University,” Fort
Lesley J. McNair, Washington D.C., May 1, 2001 [http://www.whitehouse.gov/news/releases/2001/05/
20010501-10.html].
26 Ronald T. Kadish, Director, Ballistic Missile Defense Organization (BMDO), “The Ballistic Missile Defense
Program,” prepared testimony on ballistic missile defense policies and programs in review of the Defense
Authorization Request for Fiscal Year 2002, United States Senate Committee on Armed Services, July 12,
2001.

－22－

different means.

Moreover, it became clear that the latter threat would be more real to thesecurity of the US.

Therefore, the 9/11 terrorist attacks proved the importance of homeland

defense, which culminated in the establishment of the Department of Homeland Security.

Since

this move emphasized the US security situation, in which real threats could occur anywhere atanytime, the Bush Administration has shown no sign of slowing down the promotion of MD; in its
Quadrennial Defense Review (QDR) Report published in September 30, 2001, the administrationemphasized the importance of MD in view of ballistic missile proliferation expanding on a scale
greater than previously expected.27

The Bush Administration moved to further promote MD and, on December 13, 2001, formallynotified Russia that the US would be withdrawing from the ABM Treaty effective six months later.
In January 2002, BMDO was renamed the Missile Defense Agency (MDA), underlining theresolution of the Bush administration to promote MD.

Congressional testimony in February 2002 by MDA Director Kadish stated that the overall
structure of the MD system would undergo periodic review, but that its initial target would be toprovide a limited defense against the threat of longer-range ballistic missiles between the years
2004 and 2008.28

Concerning MD procurement, Kadish pointed out the need for continuous assessment oftechnologies and alternative approaches to MD capabilities, and emphasized pursuit of MD under“capability-based acquisition” in which improved technologies and products would be procured in
two-year blocks.

The advantage of capability-based acquisition is its flexibility in procuring acomplex system that needs to integrate the most advanced technologies, while allowing theimmediate deployment of BMD systems that can be upgraded as soon as advanced technologies
become available.

Therefore, this procurement system would enable early deployment of asystem with limited but effective capabilities.

On December 17, 2002, President Bush announced that the US would start operating initial MD
capabilities within the period 2004-06.

Initial defense capability would consist of 20

Ground-Based Mid-Course Defense (GMD) interceptor missiles (16 located at Fort Greeley in
Alaska, and four at Vandenberg Air Force Base in California), 20 Sea-Based Mid-Course Defense(SMD) (SM-3 missiles on Aegis ships), and Ground-Based Terminal Defense (GTD) interceptors
See Department of Defense, Quadrennial Defense Review Report, September 30, 2001, pp. 6-7, 18, 25.
Ronald T. Kadish, Director, Missile Defense Agency (MDA), “Statement,” before the Military Procurement
Subcommittee and Military Research and Development Subcommittee, House Armed Services Committee,
February 27, 2002.
27
28

－23－

(PAC-3).29

Based on the above program, the first GMD interceptor missiles were deployed to Fort Greeley in
July 2004.

In July 2006, at the time of North Korea’s Taepo Dong 2 launch, there were 11 GMD

interceptor missiles deployed (9 at Fort Greeley, two at Vandenberg), that were switched from “testmode” to “active service” upon the Taepo Dong 2 launch.

Since none of the seven ballistic missiles

launched, including the Taepo Dong 2, flew over Japanese territory, the interception system did
not seem to have been placed in the ready position.

Meanwhile, in October 2004, the first SMD

missiles on Aegis ships were delivered. The MD program calls for 15 Aegis destroyers with early
detection and track capabilities and 3 Aegis cruisers with actual interception capability to be
deployed in various maritime regions.30

In relation to this, the US Navy announced in March 2004 that it would permanently deploy two
Aegis destroyers to the Sea of Japan for early warning of ballistic missile launches from North
Korea. 31

The final report of SCC (“2+2”) between Japan and the US held in May 2006

recommended the deployment of one Aegis cruiser with interceptor missiles and PAC-3s to
Okinawa, and one X-Band radar to Aomori.

As for the GTD, PAC-3s were the most advanced in their development, so their procurement anddeployment proceeded first.

They were actually used during the Iraq War of 2003, and werereported to have successfully intercepted two Iraqi al-Samoud SRBMs.32

Upon North Korea’s ballistic missile launches in July 2006, the US deployed RC-135Ss (Cobra
Ball), electronic reconnaissance aircraft designed specially to monitor and track ballistic missiles,
to Kadena Base, and the missile monitoring ship “Observation Island” as well as Aegis destroyers
to Sasebo, and started operation of the X-band radar deployed to Shariki Base from June 26, days

George W. Bush, “Presidential Announces Progress in Missile Defense Capabilities,” Statement by the
President, December 17, 2002 [http://www.whitehouse.gov/news/releases/2002/12/20021217.html]; U.S.
Department of Defense, “Missile Defense Operations Announcement,” News Release, December 17, 2002
[http://www.defenselink.mil/news/Dec2002/b12172002_bt642-02.html]; Ronald Kadish and J. D. Crouch,“Missile Defense Deployment Announcement Briefing,” December 17, 2002 [http://www.defenselink.mil/news
Dec2002/t12172002_t1217missiledef.html]. On the other hand, for criticism of the decision, see Joseph
Cirincione, “Bush’s Folly,” Carnegie Analysis, Carnegie Endowment for International Peace, December 18,
2002 [http://www.ceip.org/files/nonprolif/templates/article.asp?NewsID=4114]. Also, other analysis indicatedthat the operational start of the US missile defense system will be in the year 2010 or later, except in the caseof PAC-3. See Philip Coyle, “Rhetoric or Reality?: Missile Defense under Bush,” Arms Control Today, Vol. 32,
No. 4 (May 2002) [http://www.armscontrol.org/act/2002_05/coylemay02.asp].
30 Kensuke Ebata, “How Advanced is Ballistic Missile Defense?”, Sekai Shuho, August17-24, 2004, p. 22 (inJapanese).
31 Ibid., p.20-21.
32 Ibid., p.24.
29

－24－

before the originally planned operation date.

Through these measures, including early warning

satellites already in place, the US established a sufficient multi-layer system to track missiles
launched from North Korea.

The US also stated its intent to deploy Aegis cruisers equipped with

SM-3 missiles to Yokosuka by the summer of 2006, and the PAC-3 to Kadena Base in Okinawa
before the end of 2006.

The US FY2007 Defense Budget included 10.4 billion dollars for MD related expenditures (from8.8 billion dollars for FY2006).

Moreover, 4 billion dollars are to be spent by FY2011 to improve

space-based early warning systems.33

4.

Responses of Other Countries to Ballistic Missile Defense

In 1985, the US invited its allies and friends to join the SDI.
US invitation participated in joint R&D projects.

Those countries that accepted theIn addition, many countries are now

cooperating in such efforts as the Bush Administration further promotes the advancement of MD
development (the ballistic missile defense cooperation between Japan and US will be further
discussed in chapters 4 to 7).

Germany, France, Italy and the US began Theater Missile Defense Architecture Studies (TMDAS)
in 1987 and agreed to develop MEADS as an air defense system with TMD capability in February
1995 (France later withdrew from this agreement34).

The US argued for TMD efforts under NATO, and in 1993 the “Special TMD Working Group with
Expanded Air Defense” was established to review cooperation in ballistic missile defense.

In

1995, the Missile Defense Ad Hoc Group (MDAHG) was established to study technologicalfeasibility and the concept of technological content.35

The feasibility study of Active Layered Theatre Ballistic Missile Defense (ALTBMD) continued
from 2001 until 2004, with studies on how to defend the NATO troops deployed within the NATOregion from ballistic missiles, and the NATO decided in February 2005 to deploy ALTBMD.

In

addition, during the Prague Summit in November 2002, the leaders of 19 NATO member countries

33

The Sankei Shimbun, February 9, 2006.

At first, France showed strong interest in ballistic missile defense. See, for example, Henri Conze,“Transatlantic Cooperation on Missile Defense: A French Perspective,” Comparative Strategy, Vol. 14, No. 4(1995), pp. 431-441.
35 On the TMD cooperation with European NATO member countries and NATO itself, see Kensuke Ebata,“Missiles Defense in Europe and Russia” Satoshi Morimoto (ed.), Missile Defense: The New Structure ofInternational Security (Tokyo: Japan Institute of International Affairs, 2002), pp. 195-199 (in Japanese);
BMDO, 1997 Report to the Congress on Ballistic Missile Defense, chapter 7, pp. 2-3.
34

－25－

agreed to implement a NATO Missile Defense Feasibility Study, which took place from January
2004 until June 2005.

Upon North Korea’s missile launches in July 2006, NATO accelerated its

study of introducing a missile defense system capable of defending all Europe since it perceived
that the threat of missile proliferation from North Korea to the Middle East had been heightened
further.

NATO has started talks, and is likely to set the direction for introducing missile defense

systems by the Summit Meeting in November 2006.36

At present, bilateral MD cooperation is developing between the US and European countries.

The

United Kingdom approved the improvement of early warning radar located at Fylingdales Base, as
the US requested.

Denmark also agreed to improve the capability of early warning radar at the

US base in Thule, Greenland in 2004.

Poland is continuing dialogue with the US on accepting an

MD base to defend the US homeland.

If implemented, it will be beneficial not only to the defenseof the US but also to that of Europe as a whole. However, there are some opposing opinions in
Poland, Russia has expressed concerns, and other East European countries are indicating theirunease, so it is not clear how this proposal will take shape in the future.

Despite the progress in MD cooperation with other countries, one country that has not been
positive is Canada.

Although it revised its agreement with the US in June 2004 to allow use of

information gathered at the North American Aerospace Defense Command (NORAD), it declaredin February 2005 that it would not participate in the US MD framework.

In addition to European countries, the US and Israel continue joint development of the Arrowmissile through economic and technological assistance from the US, which begun during the timeof SDI.37

Work on an improved Arrow II system entered the deployment phase in March 2003,

but both countries continue joint research on improvements, testing, and manufacturing.
Australia decided to participate in the US MD in December 2003 (in July 2004, it signed an MD
Framework MOU with the US), and approved the establishment of a missile launch monitoring
facility (Pine Gap) in Australia, which will help US homeland defense.

The immediate issues forAustralia will be how to provide MD capabilities, including the development and testing ofOver-the-Horizon (OTH) radars, and Modeling and Simulation (M&S), as well as the installationof Aegis sensor equipment on Australian destroyers.38

36
37

Yomiuri Shimbun, July 13, 2006 (morning edition).

See Ebata, “Missiles Defense in Europe and Russia” pp. 182-187; BMDO, 1997 Report to the Congress on

Ballistic Missile Defense, chapter 7, p. 4

38 On MD cooperation between the US and allied or friendly countries, see Japan Defense Agency, Defense ofJapan, 2005, pp. 154-155; Paula A. DeSutter, Assistant Secretary for Verification, Compliance, andImplementation, “State Department’s Role in Missile Defense,” Remarks at the National Defense University
Foundation Congressional Breakfast Seminar Series, Washington D.C., April 4, 2006 [http://www.state. gov/

－26－

As mentioned before, Russia has continued efforts to develop BMD systems since the Cold War era.
The Soviets deployed the world’s first ballistic missile defense system, A-350 (Galosh), in Moscow
in 1964.

Even after the collapse of the Soviet Union, improved A-350s (called A-135s) are still

positioned to defend the capital.

However, Russia may face problems in continuing A-135

deployment due to economic difficulties.

These nuclear-capable ABMs are designed to counter

nuclear-armed ballistic missiles at very high or low altitudes.

In addition to these ABMs, Russia

has S-300 BMD-capable air defense missiles, developed since the Soviet era.39

Among Asian countries, South Korea announced its “non-participation in TMD” in March 1999.
It is true that even if South Korea deploys an upper-tier defense system such as THAAD and
NTWD, it would not have any military significance in relation to North Korea, as threats from
North Korea are from long-distance artillery and SRBMs that are difficult for upper-tier systems
to counter.

Moreover, it was pointed out that, if South Korea introduces upper-tier defenses,

China may consider it a measure to defend against Chinese MRBM and IRBM attacks.

In otherwords, although South Korea has not eliminated the possibility of introducing the PAC-3
lower-tier defense system, South Korea seems more concerned with China’s reaction to its
participation in TMD.

Believing that the term “TMD” itself has a strong implication ofanti-China sentiment, South Korea may have given consideration to China’s concerns regarding
TMD.40China has been continuously critical of the efforts of Japan and the US to promote BMD, but they
themselves have deployed Hong Qi 10 (SA-10) and Hong Qi 18 (SA-12) air defense missiles
imported from Russia or manufactured under license from Russia, which are said to have thecapability, though limited, to intercept short- to medium-range ballistic missiles.

Moreover,China is said to be planning the deployment of the Russian S-300PMU-2 by September 2006.41

In

March 2006, the official PLA bulletin reported a successful test of interceptor missiles similar to
the US Patriot.

t/vci/rls/rm/64126.htm].
39 Ebata, “Missiles Defense in Europe and Russia”, pp. 178-182.
40 Hidenari Kurata, “Missile Defense and South Korea: Its Selective Introduction and ‘Missile Unbalance,’”
Satoshi Morimoto (ed.), Missile Defense: The New Structure of International Security (Tokyo: Japan
Institute of International Affairs, 2002), pp. 138-139 (in Japanese). For South Korean attitude andresponses, see also A Henry L. Stimson Center Working Group Report, “Theater Missile Defenses in the
Asia-Pacific Region,” Report, The Henry L. Stimson Center, No. 34 (June 2000), pp. 33-36; Michael J. Greenand Toby F. Dalton, “Asian Reactions to U.S. Missile Defense,” NBA Analysis, The National Bureau of Asian
Research, Vol. 11, No. 3 (November 2000), pp. 21-25.
41 Martin Walker, “China’s Defense Challenge,” UPI, May 26, 2006 [http://www.spacewar.com/reports/
Chinas_Defense_Challenge.html].

－27－

Located within the range of Chinese SRBMs, Taiwan has submitted to its Parliament a proposal topurchase PAC-3s from the US.
opposition from the KMT.

However, for political reasons this proposal has faced strong

Taiwan has also asked the US for BMD-capable Aegis ships, but beenrefused.

Considering the number of SRBMs China possesses and the geographical proximity of China andTaiwan, the significance of BMD systems such as PAC-3s may be limited in a military sense, but
the deployment of such weapons may be significant in demonstrating Taiwan’s determination toresist military pressure from China.

Once Taiwan acquires BMD systems, the US will

necessarily share the burden of their operation.

This may bring a “virtual military alliance”

between the US and TaiwanＢ―exactly the point of China’s concern.

5.

Cruise Missile Defense

How are countries addressing cruise missile defense?

Ever since the Israeli destroyer "Eilat" wassunk by four short-range Egyptian anti-ship missiles in October 1967, navies all over the world
have made extensive efforts to develop defenses from anti-ship missiles, including anti-ship cruise
missiles.

Today, modernized navies have achieved some capabilities in anti-ship missile defense.

However, for defense from land-attack cruise missiles, even the US, which has the world’s
strongest cruise missile capability (Tomahawks), has not done much in terms of cruise missile
defense studies.

Needless to say, Japan and other countries have lagged behind and hardly

conducted any such study.

Today, most cruise missiles around the world are ASCMs.

Many of them are Russian Styx,

Chinese CSSC-2 (Silk Worm), and their derivatives, which are rudimentary anti-ship missiles
with shorter range, slower velocity, and simple guidance systems.

Although rogue states possess

cruise missiles, most of them are such ASCMs.

The SS-N-22 (Sunburn) that Russia supplies to China is an ASCM (that could possibly be used as
an ALCM or SLCM) with super-high velocity and excellent stealth.

As they fly at very low

altitude, it is difficult to detect them, thereby posing a significant threat to modern surface
combatants, including US aircraft carriers and Aegis ships.

In terms of LACMs with 1,000 km or longer range, only the US and Russia possess such weapons
today.

Yet several countries, including China, are undertaking development plans for them, so－28－

the number of LACM-capable countries will likely increase.42

In its National Information Estimate of 2001, the US predicted that 10 to 20 countries are likely topossess LACM capabilities by 2015.43

Such LACMs have greater precision attack capabilities

and longer ranges through the application of advanced technologies such as Global Positioning
System (GPS) guidance.

Countries having difficulties in obtaining such advanced technologies

have started to use ASCMs for land attacks.

Iraq, for example, used Chinese CSSC-3s during the2003 Iraq War.

With the accelerated pace of proliferation and potential for effective attacks, cruise missile threats
are expected to grow further.

Therefore, it will become more important to address cruise missile

defense as well as ballistic missile defense. At the moment, however, the highest priority forJapan and the US is ballistic missile defense; cruise missile defense remains a ways behind.
[Cruise missile defense will be discussed further in Part 3, Chapter 13.]42 In regards to the possession of cruising missiles, see Thomas G. Mahnken, The Cruising Missile Challenge(Washington D.C.: Center for Strategic and Budgetary Assessments, 2005), pp.9-23.
43 National Intelligence Council, Foreign Missile Developments and the Ballistic Missile Threat Through2015, Unclassified Summary of a National Intelligence Estimate, December 2001, p.14.

－29－

Chapter 2
1.

Missile Threats to Japan

Security Environment of Japan

With the end of the Cold War and the collapse of the Soviet Union, the bipolar structure led by the
US and Soviet Union ended, and the threat of Russia was drastically reduced in Northeast Asia.
Moreover, since the end of the Cold War, interdependence, mainly in economic issues, has
increased among the East Asian countries.

In terms of security, the region’s countries have also

promoted confidence-building measures, particularly since the establishment of the ASEAN
Regional Forum (ARF) in 1994.

However, the security environment in Northeast Asia is not necessarily heading in a favorable
direction.

Regional confrontations that used to be controlled under the US-Soviet bipolarstructure have become more apparent than ever, while new confrontational relationships emerge.
The Korean Peninsula and the Taiwan Strait remain divided since the Cold War, and tensions
there have risen from time to time.

In Northeast Asia, there are still several unresolved

territorial disputes among Japan and surrounding countries, including the Northern Territories,
Senkaku Islands, and Takeshima.

China is busily engaged in activities to secure natural resources that are for sustaining its rapid
growth, including aggressive approaches to acquiring rights and interests in the East China Sea
and Spratley Islands.

How the rise of China, which is rapidly modernizing its militarycapabilities, will affect the security environment of Northeast Asia and beyond is still unclear, butmany cannot feel optimistic about its future direction.

There exist some flash points between China and the US.

In the short term, there is the problemof the Taiwan Strait, and in the medium to long term there are problems pertaining to theirrespective positions in the Asia-Pacific region and beyond.

In addition, weapons of mass

destruction (WMD) and missiles to deliver them are closely related to regional security trends.
Given the complexity of relationships among the countries in the region, the security situation
surrounding Japan can hardly be described as stable.

The 9/11 terrorist attacks had significant implications for the security environment of Northeast
Asia.

Forced to recognize the vulnerability of its own homeland, the US has clearly adopted asecurity policy that emphasizes protection of national interests backed by its overwhelming
advantage in military power.

The so-called “Bush Doctrine” symbolizes such a policy.

In

September 2002, the US released a National Security Strategy (NSS) that listed homeland－30－

security, the proliferation of WMD, and terrorism as the issues of highest priority, and declaredthat the US would not hesitate to take preemptive actions against such threats, unilaterally ifnecessary. 1

The new NSS in September 2006 also stated that, while seeking “to address

proliferation concerns through international diplomacy,” “[i]f necessary, …under long-standing
principles of self defense, we do not rule out the use of force before attacks occur, even if
uncertainty remains as to the time and place of enemy’s attack,” reiterating that it would still
maintain the option of preemptive actions.2

Since the 9/11 terrorist attacks, the US has accelerated the shift of its security focus from Europe
to the Middle East and Asia.

Although the terrorist attacks hit the US homeland, the “wars on

terrorism” are being fought in Afghanistan and Iraq.

In the Quadrennial Defense Review (QDR)

of 2001, the US indicated concern over the rise of China, saying that “[t]he possibility exists that a
military competitor with a formidable resource base will emerge” in Asia and that “[t]he East
Asian littoral―from the Bay of Bengal to the Sea of Japan―represents a particularly challenging
area.”3

The US also defined the region from the Middle East through the Malacca Strait to East

Asia as “an arc of instability” and argued for a stronger presence of US forces in this region as partof a US global strategy.

In its QDR of 2006, the US pointed to China as one of the countries at the “strategic crossroads,”
stating that “[t]he pace and scope of China’s military build-up already puts regional militarybalances at risk,”4 and announced the US “Navy plans to adjust its force posture and basing toprovide at least six operationally available and sustainable carriers and 60% of its submarines in
the Pacific to support engagement, presence and deterrence.”5

The US expects Japan to act as abase for US security policies toward Asia, as well as a platform for US deployments to “the arc of
instability,” including the Middle East.

Northeast Asian countries have either cooperated with the new US policies or resisted them.
North Korea admitted its possession of nuclear weapons in October 2002.

Since then, it hasargued that the US intends to suppress North Korea and adhered to a policy of possessing nuclear“deterrence power.” China, seeking multipolarism to check growing US unilateralism since the
9/11 terrorist attacks, has solidified the Shanghai Cooperation Organization (SCO) established

1 See United States of America, The National Security Strategy of the United States of America, September
2002
2 Ibid., p. 23.
3 Department of Defense, Quadrennial Defense Review Report, September 30, 2001, p. 4.
4 Department of Defense, Quadrennial Defense Review, February 6, 2006, p. 29.
5 Ibid, p. 47.

－31－

under China’s initiative with Russia and Central Asian countries, while reinforcing its
relationships with countries in Africa, the Middle East, Southwest and Southeast Asia, the South
Pacific, and Latin America.

Japan and South Korea, two key US allies in the region, have taken strongly contrasting paths.
The Japan-US alliance was gradually strengthened through the announcement of the “Japan-US
Joint Declaration on Security” in 1996 and the establishment of the “Guidelines for Japan-US
Defense Cooperation” in 1997.
attacks.

The alliance relationship has grown closer since the 9/11 terrorist

Faced with a deteriorating security environment in Northeast Asia, Japan and the US

recognized that the strengthening of their alliance would play an important role not only in the
defense of Japan, but also in regional security.

Under such recognition, both countries havediscussed means of improving alliance capabilities to respond to new types of threats and various
situations through the Japan-US Security Consultative Committee (SCC, or “2+2”) and otherchannels.

On the other hand, the US-South Korea alliance has seemed to cool since the inauguration of the
Roh Moo-hyun administration, which has asserted the vision of South Korea as a “balancer” inNortheast Asia between “Japan / US” and “China / Russia,” and pushed for “autonomous defense.”
South Korea’s conciliatory attitude toward North Korea, antipathy among the South Korean
people to US forces in their country, and the restructuring of US forces in South Korea as part of ageneral realignment of US force structure, all contributed to the cooling of this relationship.

The US is not the only factor that influences the security environment in Northeast Asia.

Japan

and North Korea intermittently hold dialogues on normalizing diplomatic relations but theabduction issue and spy ship incidents have prevented the development of their relationship.

In

an emergency on the Korean Peninsula, Japan, as an ally of the US, would immediately face aserious WMD threat from North Korea.

Japan-China relations can be called “politically chilly

and economically warm,” due to competition for leadership in East Asia, the issue of marine
resource exploration, and problems of past history.

In such a situation, the rise of narrow-mindednationalism in Northeast Asia is likely to become a factor in rising tensions over political andsecurity issues.

Northeast Asian countries were divided in their response to North Korea’s ballistic missile
launches in July 2006.

While Japan and the US saw North Korea’s launches as a serious threat

to regional and international security, and attempted to gain a UN Security Council resolution
stipulating sanctions against North Korea under UN Charter Article 7, China and Russia merely－32－expressed their “strong regret” and opposed the adoption of a resolution involving sanctions.
These two neighbors of North Korea feared that pushing North Korea too hard might impact bothof them.

In addition, they might have been motivated by their goal of offsetting the unilateralstructure led by the US.

South Korea expressed “strong regret” during a South-North Ministerial

Meeting held immediately after the North’s missile launches and decided to stop deliveries of riceand fertilizer to North Korea.

Still, South Korea opposed the adoption of UN sanctions, andespecially criticized Japan’s strong response.

Japan and the US on one side and China andRussia on the other at last compromised to adopt the UN Security Council resolution.

However,these developments strongly suggest a polarization of Northeast Asia between Japan-US andChina-Russia on security issues, with the current South Korean administration, given its strong
anti-Japan sentiment, tending to incline toward China.

Northeast Asia cannot ignore global security issues, especially moves by non-state actors such as
international terrorist groups.
Asia.

International terrorist networks extend to Asia, mainly Southeast

Japan, which has further strengthened its relationship with the US since the 9/11 terrorist

attacks, dispatched its Self-Defense Forces to Iraq, and actively participated in the MIO (Maritime
Interception Operation) near the Arabian Peninsula, may become their target.

Traditional power politics are likely to continue in Northeast Asia for the time being, and regionalcountries will place higher priority on security issues.

Certainly these countries value economic

development as well, and it is difficult to predict whether cooperation on economic issues willcontribute to further stability or promote instability in this region.

The security environment ofNortheast Asia is leaning toward further complexity, so the factors to which Japan must pay
attention are increasingly diversified and indeed some already constitute threats.

2.

Issues of WMD and Missiles in Northeast Asia

The Northeast Asian security environment is increasingly complicated by the fact that regional
security is closely tied to WMD and missiles.

Three major nuclear-weapon states, the US, Russia and China, have been involved deeply inNortheast Asian security issues.

Russia’s nuclear forces have been shrinking because of financial

difficulties, but it is still a “nuclear superpower” and promotes the development and deployment of
new strategic nuclear weapons. Although the US repeatedly states that no hostile relationshipexists between it and Russia, there is no doubt that the US continues to maintain strategic nuclear
posture readiness with Russian strategic nuclear power in mind.

－33－

Concerning US-China relations, the Nuclear Posture Review submitted to Congress by the Bush
Administration in 2001 included China as one country that could be involved in immediate or
potential contingencies.

China’s efforts to modernize its nuclear forces are being undertaken on

the assumption of a potential confrontation with the US.

On the other hand, China-Russia relations are becoming closer due to their common interest in
offsetting the dominance of US power.

China is one of Russia’s largest customers for arms

exports, including high-performance fighter jets and submarines.

Because of potential concerns

over China, the weapons that Russia provides are not necessarily the most advanced.

The Soviet

Union stopped cooperation in nuclear weapons and missiles with China from the Sino-Soviet
confrontation in the late 1950s.

If the China-Russia relationship remains favorable, then wecannot eliminate the possibility of Russia providing its most advanced weapons to China as well as
extending technological cooperation in nuclear weapons and missiles.

Non-nuclear-weapon states cannot remain bystanders on issues on WMD and missiles.

North

Korea declared its withdrawal from the Nuclear Non-Proliferation Treaty (NPT) in January 2003,
and has frequently stated its retention of “nuclear deterrence capabilities.”
widely deemed to possess biological and chemical weapons.

North Korea is

Moreover, despite a commitment tocontinue a moratorium on missile launching under the Pyongyang Declaration between Japan andNorth Korea, North Korea has continued to develop, deploy and increase its ballistic missile
capabilities – as underlined by their missile launches in July 2006.

South Korea and Taiwan do not possess WMD or mid- to long-range ballistic missiles.

Yet, South

Korea has short-range ground-to-ground ballistic missiles, and Taiwan possesses land-attack
cruise missiles and the potential capability to manufacture ballistic missiles.

Both countries

seriously considered development of nuclear weapons during the Cold War, but abandoned suchplans due to pressure from the US.

In addition, there exists the possibility of non-state actors,

including international terrorist groups, possessing WMD and missiles, even if limited in numbers
and capabilities, and using them in the Northeast Asian region.

This section will focus on the situation of North Korea, China, and Russia in terms of WMDs andmissiles that may pose threats to Japan.

It must be noted that these three countries are

considered as major exporters of WMD and missiles, as well as related materials, equipment and－34－technologies.6

1)

North Korea

Since the end of the Cold War, the North Korean nuclear issue has been considered one of the mostimportant issues that the international community needs to address.

Long suspected of nuclear

weapons development, North Korea rejected special inspections by the International Atomic
Energy Agency (IAEA) in 1993, and announced its intent to withdraw from the NPT.

However,through negotiation with the US, North Korea “suspended” its withdrawal from the NPT, andsigned the Agreed Framework with the US in 1994.

The Agreed Framework stipulated that, in

return for the freezing of North Korean nuclear-related activities and the dismantling of its 5 MWgraphite-moderator reactor, the US would support the construction of light water reactor power
plants in North Korea, and provide 500,000 tons of heavy oil annually as alternative energy until
its completion.

Through a series of processes, the Agreed Framework aimed first to freeze North

Korea’s capability to develop nuclear weapons, and then to have North Korea entirely abandon its
nuclear weapons program.

However, when the US presented evidence of secret North Korean uranium enrichment activities
in October 2002, North Korea allegedly admitted it7 and argued that it would continue nuclear
weapons development in violation of the Agreed Framework.

Later, North Korea admitted its

retention of “nuclear deterrence capabilities” and in January 2003, declared “an automatic andimmediate effectuation of its withdrawal from the NPT.”

North Korea resumed the operation ofits 5 MW graphite moderator reactor and reprocessing facility frozen by the Agreed Framework,and has likely produced weapons-grade plutonium.

Since 2003, the Six-Party Talks among Japan,

the US, South Korea, North Korea, Russia and China have been held to resolve the North Korean
nuclear issue peacefully, but so far without conclusion.

North Korea is thought to already possess two or three nuclear weapons.

Some US researchers

estimated that North Korea has weapons-grade plutonium sufficient to make 6 to 8 weapons, andcould produce plutonium sufficient to manufacture one nuclear weapon per year.

If constructionof a 50 MW nuclear reactor is completed, then plutonium production capacity would increase to 10

The “Unclassified Report to Congress on the Acquisition of Technology Relating to Weapons of Mass
Destruction and Advanced Conventional Munitions” published by the US’ Director of Central Intelligencebiannually also named these three countries as major suppliers and has constantly reported on theiractivities.
7 North Korea obtained 150 tons of high-strength aluminum tubes, which are equivalent to 2600 centrifuges
for uranium enrichment, from a Russian company, and were said to have ordered 200 tons more from a
German company. See Asahi Shimbun, June 5, 2005.
6－35－

nuclear weapons per year.8

Since the Agreed Framework did not aim to freeze the development of

detonators, the pursuit of miniaturization, and the development of delivery vehicles, North Korea
has continued such activities.

It is concerned that North Korea may acquire technologies to equipballistic missile warheads with nuclear weapons.9

It is also widely known that North Korea possesses biological and chemical weapons, although thedetails are unclear. According to the 2005 National Defense White Paper of South Korea, North
Korea is estimated to have about 2,500 to 5,000 tons of toxic chemicals, including nerve, blisterand choking agents that are manufactured by several chemical plants and stored in various
facilities throughout the country, as well as the capability to manufacture such biological weapons
as anthrax, polio and cholera bacteria.10

North Korea has also sought ballistic missiles that can carry such weapons.

They have alreadydeployed several hundred SRBM Scud missiles able to reach all of South Korea. Among theballistic missiles North Korea launched in July 2006 appear to be Scud Ds with a 700 km range
and Scud ERs with a range of 1,000 km, both confirming that North Korea has continued efforts toimprove Scuds. As Scud ERs can reach the western half of Japan, they are another new concern
for the region.

The MRBM No Dong poses a direct threat to Japan.

The No Dong is a mobile, liquid-fueled,single-stage ballistic missile North Korea developed from the Scud.

The No Dong wastest-launched into the Sea of Japan in 1993, and several more No-dongs were fired in July 2006.
The No Dong’s range of 1,300 km covers the whole of Japan, and the missile can reach Japan
within 10 minutes of launch.

It is estimated to have a payload of 700 to 1,200 kg, and a Circular

Error of Probability (CEP) of 2.5 km.

This means that the No Dong can be armed with nuclear aswell as biological and chemical warheads.

At present, North Korea is believed to have about 200

No Dong missiles deployed.11

The No Dong can be fired from a Transpotable Erectable Launcher (TEL), so it is difficult to
8 See presentation by Professor Hecker of Stamford University at the symposium hosted by Carnegie
Endowment [http://www.carnegieendowment.org/static/npp/2005conference/presentations/hecker.pdf].
9 See Narushige Michishita, “The Weapons of Mass Destruction and Missiles of North Korea”, Center for the
Promotion of Disarmament and Nonproliferation, Japan Institute of International Affairs (ed.), Issues of
Non-Proliferation of Weapons of Mass Destruction, Report of the research project commissioned by Ministryof Foreign Affairs, March 2004, pp. 84-85 (in Japanese).
10 The analysis presented in the National Defense White Paper of South Korea (February 2005) was quoted
in the Japan Defense Agency’s Defense of Japan 2005 White Paper.
11 B. B. Bell, Commander, United Nations Command; Commander, Republic of Korea-United States
Combined Forces Command; and Commander, United States Forces Korea, “Statement,” Before the Senate
Armed Services Committee, 7 March 2006.

－36－

ascertain its location.12
to Japan.

A No Dong with a WMD warhead would likely cause significant damage

Therefore, North Korea may consider the No Dong an effective tool of political andmilitary intimidation to seek Japanese concessions on political issues, or for use in an emergency
on the Korean Peninsula.

North Korea may try to instigate anti-US feeling among the Japanese

by inflicting damage in the neighborhood of US bases in Japan.13
valuable tool for North Korea to earn foreign currency.

In addition, the No Dong is a

Ballistic missiles such as Pakistan’s

Ghauri and Iran’s Shehab-3 are said to be No Dong missiles or based on the No Dong design.14

The Taepo Dong, which overflew Japan in 1998, is a two-stage IRBM.

The test launch reportedly

verified technologies for the separation of multi-stage propellants, as well as positioning andthrust control.15

North Korea continues to develop the Taepo Dong 2 (3,500 to 6,000 km range,

with a new booster for the first stage, and a No Dong for the second stage), and Taepo Dong X (witha range over 12,000 km?) that can reach the US mainland.
Dong 2 in July 2006, but evidently it failed.
launch opportunity.

North Korea launched the Taepo

It is quite likely that North Korea is seeking another

For Taepo Dong X, North Korea has reportedly acquired Russian SS-N-6

technology, which would enable it to arm these missiles with rudimentary and heavy nuclear
warheads.16

According to the US National Intelligence Estimate (NIE), it is most likely that the US will face an
ICBM threat from North Korea by 2015.17

If North Korea deploys an ICBM that can reach theUS, intimidation calling into question the US willingness to sacrifice the continental US to protect
Tokyo and Seoul becomes possible, so there is some concern over a possible effect on the UScommitment to defend Japan and South Korea.

North Korea declared a moratorium on the launching of long-range missiles in 1999, and the
Pyongyang Declaration between Japan and North Korea announced in September 2002 stated an
intention to extend the moratorium on missile launching beyond 2003.

However, North Korea

Regarding the No Dong, see Michishita, “The Weapons of Mass Destruction and Missiles of North Korea,”
pp. 93-96.
13 Narushige Michishita, “The No Dong Threat and Missile Defense: Seeking New Strategies,” Sekai Shuho,
August 17-24, 2004, p. 15 (in Japanese) .
14 About the significance of the No Dong for North Korea, see Michishita, “The Weapons of Mass Destruction
and Missiles of North Korea,” pp. 96-100.
15 Defense of Japan 2005 White Paper, p. 44.
16 Andrew Feickert, “Missile Survey: Ballistic and Cruise Missiles of Selected Foreign Countries,” CRS
Report for Congress, RL30427 (Updated July 26, 2005), p. 14.
17 National Intelligence Council, “Foreign Missile Development and the Ballistic Missile Threat Through2015,” Unclassified Summary of a National Intelligence Estimate (NIE), December 2001 [http://www.cia.gov/
nic/pubs/other_products/Unclassifiedballisticmissilefinal.htm].
12

－37－

reportedly conveyed to Japan its intent not to continue this moratorium in February 2006.18

At

the time of the July 2006 missile launches, a spokesman for the North Korean Foreign Ministry
described them as part of routine military exercises.

The spokesman argued that the North’s“exercise of its legitimate right as a sovereign state is neither bound to any international law nor
to bilateral or multilateral agreements such as the DPRK-Japan Pyongyang Declaration and thejoint statement of the six-party talks.” And “the moratorium on long-range missile test-fire which
the DPRK agreed with the US in 1999…was valid only when the DPRK-US dialogue wasunderway.”

In relation to the Pyongyang Declaration, Song Il Ho, the ambassador in charge of

diplomatic normalization between Japan and North Korea, said that since North Korea hadcommitted in the Declaration to the continuation of the moratorium on missile launches beyond
2003 on the presumption that both countries would maintain a spirit of confidence building toward
a normalization of diplomatic relations, the conduct of military exercises in a situation with nosuch dialogue was not in violation of the Declaration.

Recently, it was revealed that Kh-55 air-launched cruise missiles made in the former Soviet Unionand left in Ukraine had been illegally exported to Iran (12 missiles) and China (6 missiles), andthere has been growing concern that such illegal trade might include North Korea.19

Certainly, it

would not result in a significant threat to Japan or the US even if North Korea did obtain Kh-55
since there would be technological problems in miniaturizing nuclear warheads to fit the Kh-55,
and it would also be difficult to modify these missiles for ground launch.20

Still, the possibility ofillegal transfers related to WMD or missiles from the former republics of the Soviet Union,
including Ukraine, cannot be eliminated.

On the other hand, North Korea has exported ballistic missiles to Egypt, Iraq, Syria, Libya,
Pakistan, Yemen, and the United Arab Emirates (UAE) for a long time as a way of earning foreign
currency. In 2006 concern was raised over Venezuela seeking to import ballistic missiles from
North Korea.

Moreover, North Korea was suspected of involvement in the nuclear black market

centered on Abdul Qadeer Khan of Pakistan.21

Cooperation among states of proliferation concern may drastically reduce the time and cost to

18

Sankei Shimbun, February 11, 2006.

Feickert, “Missile Survey,” p. 9.
Kensuke Ebata, “Effects of Cruise Missiles Leaked from Ukraine”, Sekai Shuho, May 10-17, 2005, pp.
52-53 (in Japanese) .
21 For cooperation on proliferation among these countries, see Chaim Braun and Christopher F. Chyba,“Proliferation Rings: New Challenges to the Nuclear Nonproliferation Regime,” International Security, Vol.
29, No. 2 (Fall 2004), pp. 9-26; Sharon A. Squassoni, “Weapons of Mass Destruction: Trade between North
Korea and Pakistan,” CRS Report for Congress, RL31900 (May 7, 2003); Leonard S. Spector, “The Rise of a
New Axis?” Yale Global, 11 February 2005 [http://yaleglobal.yale.edu/article.print?id=5265].
19
20

－38－

acquire nuclear weapons, resulting in a serious challenge to non-proliferation efforts. For example,
there is the possibility that North Korea exported ballistic missiles to Pakistan in return for
uranium enrichment and other nuclear weapon-related technologies.22

Moreover, North Korea

was suspected of exporting No Dong parts and technologies to Iran, and reportedly exported
uranium hexafluoride to Iran in May 2004.23
tons of uranium hexafluoride to Libya.24

In addition, North Korea most likely provided two

Although the US so far has not found solid evidence that

North Korea supplied fissile materials to international terrorist groups, there is no assurance thatthey will not do so in the future,25 per the US view that it is not clear under what situation North
Korea would sell nuclear weapons or technologies to other countries or non-state actors. 26

2)

China

China is the only country among the five nuclear-weapon states that has not started to reduce its
nuclear weapons, and continues efforts to modernize nuclear capabilities with emphasis on thebuild-up of ground based ballistic missiles.

China’s modernization efforts have already succeeded in the development of SRBMs and MRBMs.
Their SRBMs are solid-fuel mobile-launched DF-11s (with a 300 km range) and DF-15s (with a
600-km range), deployed since 1995.

Most of these missiles are armed with conventional

warheads and deployed facing the Taiwan Strait.

The number deployed to this area is about 710

to 790, and is estimated to increase by 100 missiles per year.27

These missiles have relatively

good precision with a CEP of 200 to 300 meters, and can pose a significant threat not only to
Taiwan, but also to US naval forces deployed in Northeast Asia.

Moreover, some of these SRBMs

are within range of Okinawa and the Nansei Islands of Japan.

For MRBMs, China has deployed 50 of the solid-fuel, mobile DF-21 (1800-km range), since 1991.
The DF-21 can be armed with nuclear weapons and has relatively good precision (its CEP is 300 to

See Gaurav Kampani, “Second Tier Proliferation: The Case of Pakistan and North Korea,” The
Nonproliferation Review, Fall-Winter 2002, pp. 107-116; Sharon A. Squassoni, “Weapons of Mass Destruction:
Trade between North Korea and Pakistan,” Report for Congress, RL31900 (May 7, 2003).
23 Sankei Shimbun, November 7, 2004. Regarding the cooperation between North Korea and Iran on nuclear
22

and missile development, see also Mark Fitzpatrick, “Iran and North Korea: The Proliferation Nexus,”
Survival, Vol. 48, No. 1 (Spring 2006), pp. 62-68.
24 David E. Sanger and William J. Broad, “Tests Said to Tie Deal on Uranium to North Korea,” The New YorkTimes, February 2, 2005 [http://www.nytimes.com/2005/02/02/politics/02nukes.html?hp&ex=1107406800&en=decef909e93c12b8&ei=5094&partner=homepage].
25 Lowell E. Jacoby, Director, Defense Intelligence Agency, “Current and Projected National Security Threats
to the United States,” Statement for the Record, Senate Select Committee on Intelligence, 16 February 2005.
26 Thomas Fingar, Assistant Secretary of State for Intelligence and Research, “Security Threats to the UnitedStates,” Statement for the Record, Senate Select Committee on Intelligence, February16, 2005.
27 Office of the Secretary of Defense, Military Power of the People’s Republic of China 2006, A Report toCongress Pursuant to the National Defense Authorization Act Fiscal Year 2000, May 2006, p. 29.

－39－

400 meters), so it is thought to have the role of attacking US bases and so on in Japan.

Includingthe modified DF-21A, China possesses over 100 MRBMs.

As for ICBMs that can attack the continental US, China presently possesses about 20 liquid-fuel,fixed-launch DF-5 missiles (with a 13,000-km range). As China continues efforts to modernize
and develop ICBMs, it is expected that solid-fuel mobile launching type DF-31 (with an 8000-km
range) are likely to be deployed soon.

The DF-31 is reportedly Multiple Independently Targetable

Reentry Vehicle (MIRV) capable, and could be converted to a JL-2 SLBM.

In addition, China is developing a DF-31A missile with a 12,000-km range.

According to the US

NIE, China is expected to deploy 75 to 100 nuclear warheads on ICBMs or SLBMs by 2015.28
China is developing the Type 094 nuclear-powered ballistic missile submarine (SSBN) that can
carry the JL-2 missile.

This SSBN is expected to enter service by 2010.

Once these SSBNs are

deployed, the survivability of China’s strategic nuclear forces and its US homeland attack
capability will be greatly increased.

To counter the BMD systems the US and other countries arepromoting, China appears to be developing multiple warheads, jamming (electronic disturbance)
against interceptor sensors, and decoys.

China is also proceeding with the development and deployment of land attack cruise missiles(LACM).

The US Defense Intelligence Agency (DIA) estimates that China will possess several

hundred high-precision LACMs that can be launched from air or ground by 2015.29

Moreover,China is modernizing their anti-ship cruise missile (ASCM) capabilities by introducing the
SS-N-22 and SS-N-27 from Russia.

Further, China is participating in the Galileo Satellite

Navigation System of the European Union (EU), causing concern that they may use thetechnologies to improve precision-guidance bombs as well as ballistic and cruise missiles.30

For many years China has supplied equipment, materials, and technologies related to WMD andmissiles to North Korea, Pakistan, Iran, Libya and others.31

The blueprints for nuclear warheads

found in Libya had some Chinese-language markings, so some believe that China might have been
involved with nuclear weapons development in Pakistan, as those given to Pakistan would have

National Intelligence Council, Foreign Missile Development and the Ballistic Missile Threat through 2015,
Unclassified Summary of a National Intelligence Estimate, December 2001, p. 8.
29 Lowell E. Jacoby, Director, Defense Intelligence Agency, “Current and Projected National Security Threats
to the United States,” Statement for the Record, Senate Select Committee on Intelligence, 16 February 2005.
30 Feickert, “Missile Survey,” p. 12.
31 On China’s cooperation in the proliferation of the weapons of mass destruction and missiles, see Shirley A.
Kan, “China and Proliferation of Weapons of Mass Destruction and Missiles: Policy Issues,” CRS Report forCongress, RL31555 (updated January 31, 2006).
28

－40－

been sent to Libya through the nuclear black market. Although China has been strengthening its
own export control system in recent years, illegal exports of related materials, equipment, andtechnologies by Chinese companies seems to be continuing.

While China is not a member of the Missile Technology Control Regime (MTCR), it has committed
to implement export control in accordance with the MTCR guidelines.

Several Chinesecompanies, however, have been involved in ballistic missile-related projects in Pakistan and Iran,and are suspected of supplying dual-use items applicable to missile development to North Korea
and other countries.

In January 2005, the US imposed sanctions against eight Chinesecompanies that have aided Iran’s ballistic missile program.32

Recently, it has been pointed out that China may be developing Theater Ballistic MSissiles (TBM)
that can be equipped with Maneuverable Reentry Vehicles (MaRV).

These TBMs, combined witha broad-ranged maritime surveillance targeting system, can attack large vessels such as US
aircraft carriers.

China’s MaRVs are expected to reach ship attack capability by 2015.

China

seems to be thinking of operating these missiles by synchronizing them with a broad-ranged
intelligence gathering system consisting of over-the-horizon (OTH) radars (of which China isalready reported to have three), surveillance satellites, and airborne early warning (AEW) aircraftor unmanned aerial vehicles (UAV).

If the target is a vessel moving at very high speed, thenhigh-powered microwave devices (HPMD) under development could be used for warheads.33

In

addition, HPMD could cause serious damage to urban targets.

3)

RussiaAlthough its strategic nuclear weapons are diminishing due to financial difficulties since thecollapse of the Soviet Union, Russia still possesses a massive strategic nuclear force second only tothat of the US.

The core of Russia’s strategic nuclear forces is its ICBMs.

When the US

withdrew from the ABM Treaty, Russia declared that it would not be bound by the Strategic Arms
Reduction Treaty II (START II) and could retain its ICBMs with MIRVs such as SS-18.

As of2006, Russia deploys 2270 nuclear warheads loaded on these ICBMs.

A new type of ICBM, the SS-27, is said to have MaRVs.

In addition, Russia is developing the

32 For example, see Director of Central Intelligence, “Unclassified Report to Congress on the Acquisition ofTechnology Relating to Weapons of Mass Destruction and Advanced Conventional Munitions, 1 July Through31 December 2003”; David E. Sanger, “U.S. Punishes 8 Chinese Firms for Aiding Iran,” New York Times,
January 18, 2005 etc.
33 See Ronald O’Rourke, “China Naval Modernization: Implications for U.S. Navy Capabilities—Backgroundand Issues for Congress,” CRS Report for Congress, RL33153 (November 18, 2005).

－41－

SS-N-30 as a SLBM to be loaded on new SSBNs entering service in 2006.

The SS-N-30 is also

thought to have MaRVs and to have a relatively short combustion time to counter boost-phase
BMD.

The number of current strategic nuclear warheads deployed, including those on heavy

bombers, is estimated to be 3814.

Russia does not possess land-based ballistic or cruise missiles with ranges of 500 to 5,500 km dueto the INF (Intermediate-Range Nuclear Forces) Treaty it concluded with the US.

Its SS-26

SRBM (with a range of 400 km for Russian versions, and 200 km for the export type) can countermissile defense systems through its boost and terminal phase maneuverability, its depressed
trajectory, and its low radar signature.34

Moreover, Russia possesses various types of anti-ship

cruise missiles as well as some land-attack cruise missiles.

For non-strategic duties, Russia relies heavily on bombers armed with nuclear weapons. Amongthem, it is believed that the Far East Regional Russian Forces possess medium-range bombers likethe Tu-22M Backfire, and sea and air launched cruise missiles.”35

In the near future, Russia is not likely to confront the US and the NATO militarily nor will
Russian nuclear forces pose a direct threat to Japan.

On the other hand, Russia’s control of

nuclear weapons after the collapse of the Soviet Union is not necessarily adequate, leading toconcern that its nuclear-armed ballistic missiles could be launched accidentally or without
approval.

Moreover, it has been pointed out that some Russian companies are supplying ballistic

missile-related materials, equipment and technologies to Iran and China.36

Feickert, “Missile Survey,” p. 8.
See Defense of Japan 2005 White Paper, p.63.
36 For example, see Director of Central Intelligence, “Unclassified Report to Congress on the Acquisition ofTechnology Relating to Weapons of Mass Destruction and Advanced Conventional Munitions, 1 July Through31 December 2003.”
34
35

－42－

Chapter 3

Comprehensive Measures against Missile Attacks

1.

Comprehensive Measures to Respond against Ballistic Missile Attacks

1)

SignificanceJapan is within the range of Chinese and North Korean IRBMs and MRBMs as well as some
SRBMs.

In particular, the North Korean No Dong MRBM has WMD capability that poses animminent threat under the Kim Jong Il’s brinkmanship diplomacy.

The threat from China is not

imminent, yet its deployment of ballistic missiles with ranges that can cover Japan is undoubtedly
a source of concern both in their quantity and quality.

Furthermore, there are concerns on

possible ballistic missile attacks by international terrorist groups and other non-state actors.
Japan has not adopted effective response measures against such threats.

Therefore, it isundoubtedly meaningful for Japan’s national security to respond against ballistic missile attacks
at the earliest time possible.

The significance of such measures can be summarized in thefollowing three points.

First, it will allow Japan to respond against ballistic missile attacks, which is totally lacking atpresent. At the time of North Korea’s missile launches in July 2006, Japan was in mid-way in thedevelopment of a BMD system, thus it was able to track North Korea’s ballistic missiles incooperation with the US, indicating an ability to respond much more effectively than was the caseduring North Korea’s launching of Taepo Dong 1 in 1998.

Second, it will contribute tostrengthening the Japan-US alliance by working together on promoting ballistic missile defense,and defending US Forces in Japan from the threat of ballistic missiles.

Third, Japan can play amore important role in the international community by using a BMD capability for diplomaticleverage, and for taking initiatives within regional and international frameworks of arms control,
disarmament and non-proliferation to prevent the international proliferation of ballistic missiles.

2)

Comprehensive Measures

How should Japan acquire the means to respond to ballistic missile attacks?

Considering

response against ballistic missile attacks from more comprehensive point of view, there aremeasures to constrain and prevent ballistic missile attacks, to intercept launched missiles, and tominimize damage from missile hits.

It is necessary to possess every required function including

dissuasion as a preventive diplomatic measure, deterrence as a national posture, military action
against the launching of ballistic missiles, neutralization of conventional or WMD warheads oflaunched missiles, and minimization of damage when hit. It will also necessary to maximize thesynergy of all these functions.

－43－

It will be necessary to make appropriate efforts in “dissuasion diplomacy” to prevent theappearance of threats through non-military measures such as diplomatic activities and confidencebuilding measures (CBMs).

It is also necessary to maintain a “deterrence posture” against theuse of ballistic missiles by raising doubts on the effectiveness of ballistic missile attacks.
Dissuasion and deterrence are in sense soft and hard responses that complement each other toprevent the manifestation of threats.

Moreover, military power for a “deterrence posture” canensure the effects of dissuasion diplomacy.

We should consider how to respond when deterrence efforts fail.

The immediate issue after thecollapse of deterrence is to disable an enemy’s offensive power.

There are two military means todo this.

One is “denial power” for “offensive defense” ― that is, to attack ballistic missiles bases

and to disable the missiles before launch.

The other is “defense capability” for “active defense” ―that is, to intercept incoming ballistic missiles.

This is “ballistic missile defense” in a general

sense.

Finally, it is necessary to confine damage in cases where interception fails.

“Damageconfinement” for “passive defense” involves citizens to minimize damage through deception ofimportant targets, preparation of secure buildings for evacuation, rescues measures, etc.

In summary, comprehensive measures appropriate for Japan’s response to ballistic missile attacks
are (1) dissuasion diplomacy, (2) deterrence posture, (3) denial power (offensive defense), (4)defense capability (active defense), and (5) damage confinement
measures can be termed the “5Ds.”(passive defense). These five

The synergistic effects of these 5Ds will be critical to Japan’s

response against ballistic missile attacks.

2.

Five Measures to Respond against Ballistic Missile Attacks (5Ds)

1)

Dissuasion Diplomacy

In response to ballistic missile attacks, dissuasion diplomacy is a means to prevent the
manifestation of threats through diplomatic activities and CBMs.

Dissuasion diplomacy includes

efforts to prevent the proliferation of WMD and ballistic missiles, and related efforts in arms
control and disarmament.

International conventions related to the proliferation of WMD include

the Nuclear Non-Proliferation Treaty (NPT), the Biological Weapons Convention (BWC), and theChemical Weapons Convention (CWC).

For the non-proliferation of ballistic missiles, there are

the Missile Technology Control Regime (MTCR), and the Hague Code of Conduct against Ballistic
Missile Proliferation (HCOC).

Japan needs to reduce threats by participating in arms control,

disarmament, and non proliferation measures to prevent WMD and ballistic missile proliferation,－44－

as well as prevent the manifestation of threats through strengthening non-proliferation regimes
and persuasion of non-participating countries to join the relevant treaties.

In this sense, it is worthy to note that Japan has been participating in the Proliferation Security
Initiative (PSI) as a core member, and hosted a multilateral exercise called “Team Samurai 04” in
October 2004.

In addition, Japan took an initiative in response to North Korea’s missile launches

July 2006, and succeeded in winning the unanimous adoption of the UN Security Council
Resolution 1695.

This resolution not only condemned the actions of North Korea, but also

mandated to prevent the trade of missiles or related items, materials, goods and technologies, andthe transfer of any financial resources in relation to North Korea’s development of missiles and
WMD (although the resolution did not include sanctions).

Unfortunately, there is no arms control/non-proliferation framework for ballistic missiles and
WMD in Northeast Asia, although several countries possess such weapons.

Therefore, Japan

must actively participate in building such a framework to discuss regional arms control,
disarmament and non-proliferation, including the six-party talks on the North Korean nuclear
issue.

Japan must also take the initiative to develop CBMs with neighboring countries, attempt

to promote mutual understanding, ensure transparency, and thus develop a confidence-building
regime in Northeast Asia that can become a regional arms control, disarmament andnon-proliferation regime. At the same time, sufficient capabilities for both offensive defense andactive defense will be essential for Japanese deterrence power that can support such dissuasion
diplomacy. [See details in the Chapter 8 of Part 3.]

2)

Deterrence Posture

Considering the security environment surrounding Japan, the soft and non-military measures ofdissuasion diplomacy alone will not make arms control, disarmament and non-proliferation of
WMD and ballistic missiles to effective.

In the real world of international politics, what brings

practical effect to dissuasion diplomacy is a hard and reliable response, which will make hostile
entities doubt the effect of WMD attacks and restrain the use of such weapons. In other words, it
is essential for Japan to retain military response capabilities.

To deter ballistic missile attacks, it is necessary to make opponent’s decision-makers realize thatsuch attacks will not have their expected effects, or will invite massive retaliation.

For thedeterrence to function properly there must be sufficient capability for retaliation, offensive defense
or active defense, as well as will of their use.

Offensive nuclear weapons have been considered

the most effective weapons for deterrence.

While the Japanese Government has stated that－45－

possession of a minimum level of nuclear weapons for self-defense is not prohibited under Japan’sConstitution, 1 Japanese policy is not to possess nuclear weapons in consideration of popularsentiment of being atomic-bomb victims, and a desire not to become a military power, as well as
the potential for destabilizing the region.

Instead, it has relied on the extended deterrence

provided by the US, known as the “nuclear umbrella.”

Under the “exclusively defensive-oriented policy,” Japan used to have only armaments of active
defense, but not offensive defense that could strike at enemy bases.
were required, US Forces were expected to take this role.

If offensive defense measures

As described in the “Japan-US

Alliance: Transformation and Realignment for the Future,” adopted at the Japan-US Security
Consultative Committee (SCC or “2+2”) in October 2005, “U.S. strike capabilities and the nuclear
deterrence provided by the U.S. remain an essential complement to Japan's defense capabilities inensuring the defense of Japan and contribute to peace and security in the region.”

It is a realistic

national security policy for Japan to continue relying on US deterrence power, and further
promote a close allied relationship with the US.

However, threats in the 21st Century may arise suddenly and unexpectedly.
environment, Japan needs to build new deterrence strategy.

Under such an

The US Navy aircraft carrier task

group, which embodies effective offensive defense functions in Northeast Asia, may be absent(even if temporarily) from the region as seen in the case of Iraqi War, while Japan now facesballistic missile threats from North Korea and other countries.

It is time for Japan to seriously

consider the strengthening of its deterrence posture against ballistic missile attacks by possessing
offensive defense capability such as precision-guided munitions that can attack missile launchbases, in addition to the introduction of a ballistic missile defense system.

As symbolized by the 9/11 terrorist attacks, the characters of threats have been changing.

As hasthe development of the Revolution in Military Affairs (RMA) and further technologicaladvancements in the effectiveness of precision-guided weapon, the US is attempting to shift its
deterrence posture from solely relying on deterrence by punishment to both deterrence bypunishment and denial.

Especially noteworthy is that the US tends to rely heavily on

conventional precision-guided weapons.

This suggests that the weapon system that Japan

should possess for counter-force may also be those conventional precision-guided one. [See details
in the Chapter 9 of Part 3.]

Reply of Reijirou Tsunoda, then the Director-General of Cabinet Legislation Bureau at the Budget
Committee of House of Councilors during the 96th Diet (April 5, 1982).
1

－46－

3)

Denial Power (Offensive Defense)

Denial power is an offensive defense capability to preempt missile launchers and related C4I
installations, as well as ballistic missile-armed submarines and surface vessels (all referred to as“ballistic missile bases” hereinafter) using missiles, aircraft, surface vessels, and other armaments.
This denial power is undoubtedly an effective means to deter ballistic missile attacks.

In regards

to attacks on ballistic missile bases, the Japanese Government interprets its Constitution to saythat attacks on missile bases would be within the scope of national defense and allowable if noother methods are available to defend against attacks by guided missiles.2

However, Japan has

entirely relied on the US for such capability, judging that to retain offensive defense means byitself might not be beneficial in terms of effect on neighboring countries.

Yet, the security environment surrounding Japan today is under constant threat from ballistic
missiles of North Korea, which has admitted continuing its nuclear weapons development.

Therisk of missile launches against Japan may rise depending on tension in the situation of Korean
Peninsula.

Only when “offensive defense” attacks on missile bases and “active defense” missileintercept capabilities are combined, Japan can have an effective defense against ballistic missile
attacks.

In the wake of North Korea’s missile launches July 2006, arguments in Japan for having

offensive defense capabilities to preempt ballistic missiles launches have become more evident.

Still, considering the current political situation in Japan, even if possession of offensive defense
capabilities are permitted domestically, the actual use of such capability remains problematic.
Even when the risk of ballistic missile attack becomes extremely high and political leaders are
urged to launch preemptive attacks, hesitation could result in missing the opportunity for an
appropriate response.

Moreover, because it is difficult to detect signs of missile launching incases of mobile launchers or ballistic missile-armed submarines, the possibility of a sudden firststrike cannot be eliminated.

Thus, Japan needs to possess both the BMD system that can intercept the opponent’s first strikeby ballistic missile, and the offensive defense capability to minimize damage by preventing
follow-on attacks.

The capability and the will to carry out attacks against ballistic missile bases will constitute aneffective deterrence posture.

It will also be important to review Japan’s security environment

The answer of then the Prime Minister Ichiro Hatoyama (read by then the Director-General of Defense
Agency, Naka Funada) at the Cabinet Committee of the House of Representatives during the 24th Diet
(February 29, 1956).
2－47－

regularly and build consensus among government officials on the required conditions for invoking
the right of preemptive attack on ballistic missile bases.

Under the Japan-US Security Arrangement, US forces have taken the role of offensive defense.
Under the current “Guidelines for Japan-US defense cooperation” as well, Japan is to closelycooperate and coordinate its Self-Defense Forces with US forces for ballistic missile defense andUS forces are to use offensive power, if needed. While US forces are to carry out offensive defense
operations against hostile missile bases, Japan is to provide operational and logistic support to US
forces and protect US bases in Japan, thereby maintaining the mutuality of the alliance.

However, if the US is conducting military operation in other regions, and has difficulty inconcentrating sufficient offensive forces to conduct offensive defense operations near Japan, Japan
will have to assume some of the US role.
eliminate immediate threats by itself.
role sharing in such situations.

Japan needs to bear in mind that it may be required to

It is imperative for Japan to closely consult with the US on

Japan must be ready to invest considerable resources to establish

offensive defense measures, and at the same time thoroughly explain its intention to both its
public and the international community. [See details in the Chapter 10 of Part 3.]

4)

Defense Capability (Active Defense)

In considering BMD as an “active defense” measure, Japan’s geographic position makes it
necessary to build a multi-layered defense system that can allow defense in-depth utilizing ground,sea, air, and space systems.

Based on both US and Japanese tests, the Japanese Government hasdetermined that a BMD system has high technological feasibility.

It also concluded that BMD isappropriate for Japan’s national defense policies, and decided to approve development of a ballistic
missile defense system at the Security Council of Japan and subsequent Cabinet meetings inDecember 2003, and introduce the Aegis BMD system of Sea-Based Midcourse Defense (SMD) as
an upper-tier capability, and Patriot PAC-3 for lower-tier Ground-Based Terminal Defense (GTD).
[From here on we will refer to the Ballistic Missile Defense system for Japan as the “BMD
System.”]These two systems are part of Japan’s Initial Defense Capability (IDC) for BMD.

Japan is tohave four Aegis ships with BMD capability as well as 18 PAC-3 units in service starting from early
2007. At the same time, the Japan Air Defense Ground Environment (JADGE), command andcontrol, battle management and communications (C2BMC) system, will be developed to integratethese capabilities.

Following the North Korean missile launches in July, Japan decided toaccelerate development of its BMD system.

To enable effective interception in a briefest time－48－

possible, defense related laws were revised to delegate significant authority to unit commanders.
Moreover, the operational environment has been improved with the establishment of a Chief ofJoint Staff (used to be a Chairman of Joint Staff Council) position that has strong authority withsole responsibility for operation of the Self-Defense Forces.

A future task is concrete discussion on information sharing and combined operations between the
Self-Defense Forces and US forces, especially with US missile defense units such as early warning
satellites, forward deployed Aegis ships, and X-Band radars.

From 2006, Japan-US joint

technical research becomes joint development to upgrade SM-3 interceptors in Aegis BMD ships.
For the lower-tier GTD, Japan will need to select a successor to PAC-3.
discussion of introducing THAAD, but it is still undecided.

There has been the

Other possibilities include theaddition of BMD capability to the Type-03 “Chu-SAM” (mid-range ground to air guided missile)developed by Japan for the use by the Ground Self-Defense Force, or joint development work with
the US.

5)[See Chapters 4 to 7, Part 2.]

Damage Confinement (Passive Defense)

Among damage confinement related measures, Japan needs to improve civil defense as soon as
possible.

In Japan there are some civil organizations to support police and firefighters, but theconcept of civil defense has hardly existed.

So, it is necessary to build a civil defense system thatcan cope with ballistic missile launches.

National and local governments, public entities andother organizations can develop passive defense measures.

Individuals can also raise theirnational security awareness and participate in civil defense plans to the extent possible.

Such

actions will be extremely important in preparation for damage confinement and hence forcomprehensive ballistic missile defense.

For the moment, there is an urgent need to develop communication and response measures using
existing organizations and provisions related to Japan’s Law Concerning the Measures forprotection:of the Civilian Population.

For communication measures, it will be more realistic tointegrate existing systems such as those at the Office of Prime Minister, various command andcontrol systems of the Ministry of Defense and Self-Defense Forces, disaster prevention systems of
local governments, police, firefighters and the Coast Guards, as well as the reporting systems of
public broadcasting stations.

Various countries have established civil defense measures to minimize damage from nuclear,biological, and chemical weapon attacks.

Some of these measures may be useful for Japan to,such as:－49－

・Develop a warning system covering the entire country;

・

Educate and provide necessary training to people on response measures to damage fromballistic missile or WMD attacks ;・Establish civil defense units, organized volunteering or draft;・Promote storage of essential commodities of life and medical supplies; and・

Promote national and local government efforts to build public evacuation facilities.

For example, learning from the 9/11 terrorist attacks, US President Bush established a “Freedom
Corp,” an advanced civil defense organization.

It is also important to determine the role sharingof public sectors such as Self-Defense Forces and police on the one hand, and non-governmentalorganizations (NGOs) and individual volunteer activities on the other.

At present, Japan has almost no organized efforts for civil defense.

To respond against ballistic

missile attacks, Japan needs to establish some civil defense system as soon as possible.

At thetime of North Korea’s launches of ballistic missiles in July 2006, there was a problem of delayedcommunication of information from the central government to local authorities.

Concerning

activities of Self-Defense Forces, it is necessary to develop concrete response plan for theconfinement of damages through consultation led by the Ground Self-Defense Force, with otherSelf-Defense Forces, US Forces, relevant security organizations, relevant ministries and agencies
as well as local governments.

At the same time it is necessary to implement required training of

citizens.
[See details in the Chapter 11 of Part 3]3.

Comprehensive Measures Against Land Attack Cruise Missiles

Unlike ballistic missiles, North Korea, China and other countries have not deployed land attack
cruise missiles (LACM) able to cover Japan.

However, considering the trends of North Korea andChina, it may not be long before these two countries deploy LACMs of concern to Japan in terms of
quality as well as quantity.

There is also the concern that non-state actors includinginternational terrorist groups may carry out attacks using LACMs.
effective response to such threats.

Japan does not have anJapan should as soon as possible begin to study LACM defense

measures (for example, Japan-US joint technological research), and then to implement suchmeasures as needed. As in the case of ballistic missile attacks, the significance of such actions
can be summarized in the following three points.

First is to strengthen Japan’s overall defense capability.

Second is to enhance the extended

deterrence provided by the US through capability to defend US forces in Japan from the LACMs as－50－

well as ballistic missile threats, thereby strengthening the Japan-US alliance.

Third, by adding

response to LACM attack, it will allow Japan to use such capability together with BMD related
measures to support greater initiatives in arms control, disarmament and nonproliferation efforts.

One of Japan’s priority defense issues is the development of ballistic missile defense.

Since Fiscal

Year 2004, BMD system development has taken over 10% of yearly JDA equipment procurement
budgets.

To add significant funds for LACM defense will be extremely difficult as increases in

defense budgets are not expected for some years to come.

Therefore, it would be more realistic toprioritize ballistic missiles defense while extending BMD system design to some element of cruise
missile defense, and plan a gradual development of overall air defense capabilities for the Air
Self-Defense Force to incorporate defense against LACM.

In this case, it is necessary to obtain comprehensive capabilities including dissuasion diplomacy,
deterrence posture, denial power, defense capability and damage confinement, as in the case of
5Ds for ballistic missile defense.

[See details in the Chapter 13 of Part 3.]－51－

Part 2BMD Initiative as Active Defense Measures

Chapter 4

Japan’s Ballistic Missile Defense

1.

Japan’s Ballistic Missile Defense Initiative

1)

Participation in SDI Studies

In March 1985, the US invited its allies, including Japan, to participate in the Strategic Defense
Initiative (SDI).
defense.

This was the very first opportunity that Japan was involved in ballistic missile

The Government of Japan responded with a request to clarify several principles before

agreeing on participation in SDI, namely: freedom for private industry participation andwithdrawal; case-by-casedecisionontheparticipationofgovernmental organizations;establishment of a framework for industry participation; and the US guarantee that it would not
impose a confidentiality clause. At the Bonn Summit in May 1986, Japan presented further
conditions for participation in SDI: not to pursue superiority over the Soviet Union; to benefit fromstrengthened Western deterrence; to proceed with nuclear disarmament; to not undermine theAnti-Ballistic Missiles Treaty (ABM); and to discuss SDI development and deployment with alliedcountries.

Upon US agreement to these requests and conditions, Japan expressed its intention to participate
in SDI studies in September 1986.

In July 1987, the Japanese Government signed a

Memorandum of Understanding (MOU) on SDI participation with the US (UK, West Germany,
Israel, and Italy participated under separate agreements).

In December 1988, the Western

Pacific Missile Defense Study (WESTPAC) started and continued until April 1993.

In Japan, the defense industry was the one most eager to participate in the SDI.

When the US

invited its allies to join SDI activities, it was clear that participation in SDI would provide benefits
to the industries of participants in economic and technological development terms.

They

recognized that Japan would need BMD for national security, and should strive to secure suchtechnologies from an early stage of development as well as expand opportunities for domestic
production under licensing or joint manufacturing.

On the other hand, the interests of the Japanese Government for participating in SDI werefocused on how to mitigate tensions between the US and Japan in political, economic and trading－53－

fields.

The Japanese Government wanted to use SDI as a symbol of alliance ties.1

Comparedwith the US and West European countries, Japan’s threats perception about ballistic missiles
attacks was not high.

In this sense, the Japanese Government’s decision to participate in SDI

Studies was based on its desire to manage the Japan-US alliance relationships rather thanacquire measures against such threats.

It was quite evident that the Japanese Government tooka passive approach to SDI in the form of agreement with the US: the WESTPAC Study was
structured in the form of direct contract between the US Government and Japanese companies.2

2)

Japan-US Joint NTWD Technology Study

After the Cold War, both the Japanese Government and public changed their views on national
security, especially on BMD measures.

These changed views reflected an increasingly unstablesecurity environment in Northeast Asia, and build ups of ballistic missiles in neighboring
countries.

In case of the latter, the incidents that particularly heightened perception of ballistic

missile threats in Japan were test launches of the North Korean No dong MRBM in May 1993, theTaepo Dong IRBM in August 1998, and finally the multiple missile launches in July 2006.
Korea has deployed about 200 No dong missiles that can cover whole of Japan.

North

China has also

deployed about 100 MRBM missiles including DF-21 that pose potential threats against Japan.
Such situations prompted awareness that Japan should possess a BMD system, not only toreinforce the Japan-US alliance, but also to address actual ballistic missile threats faced by Japan.
Such threat perception is an important factor that has accelerated the promotion of ballistic
missile defense in Japan.

As mentioned before, the first instance that prompted such reaction was the North Korean No
Dong launch in May 1993.

Japan and the US agreed in December 1993 to establish a “Japan-US

Working Group on TMD (TMDWG) to analyze threats and technological issues.

In September

1994, both countries agreed to start a “Japan-US Joint Study on Ballistic Missile Defense,” while
Japan independently conducted a “Comprehensive Survey on National Air Defense System” from

1 See Gregg A. Rubinstein, “Emerging Bonds of U.S.-Japanese Defense Technology Cooperation,” Strategic
Review, Vol. XV, No. 1 (Winter 1987), p. 47; Ken Jimbo, “A Japanese Perspective on Missile Defense andStrategic Coordination,” The Nonproliferation Review, Summer 2002, p. 57.

One important factor as the background of Japanese Government’s passive posture was the politicalsituation of Japan at that time. On the participation of Japan in SDI and WESTPAC, see Hamm and Weinrod,“The Transatlantic Politics of Strategic Defense,” pp. 721-728; Michael J. Mazarr, Missile Defences andAsian-Pacific Security (New York: St. Martin’s Press, 1989), p. 85; Takashi Kawakami and Ken Jimbo,“Ballistic Missiles Defense and Japan-US Alliance: Policy-Making Process and Future Prospects of Japan-US
Joint Research,” Satoshi Morimoto (ed.), Missile Defense: The New Structure of International Security(Tokyo: Japan Institute of International Affairs, 2002), pp. 263-265 (in Japanese); Hiroshi Tajima,“WESTPAC: Reasons for Proposing Missile Defense,” Speech for the Seminar at Peace and Security ResearchInstitute, Tokyo, January 26, 2000 (in Japanese); Hiroshi Tajima, “Technological Cooperation in Missile
Defense: Utilizing the Creativity of Industries,” Second Meeting of Japan-US Security Expert Meeting, Tokyo,
November 21, 2003 (in Japanese).
2－54－1995 to 1998 and thus advanced study of the technological potential of BMD.

In the process of such review, Japan initially showed interest in the Theater (currently called
Terminal) High Altitude Area Defense (THAAD) system, but later inclined toward the Navy
Theater Wide Defense (NTWD) program, reflecting: Japan’s island geography; possession of Aegis
ships that could be used as NTWD platforms; and the fact that NTWD was at an initial stage ofdevelopment unlike other programs, so there was sufficient room for Japanese companies toparticipate.3

Moreover, North Korea’s Taepo Dong launch in August 1998 strongly influenced not only the US
but also Japan on its BMD policy-making.

In September 1998, Japan and the US agreed to start

joint technology study of the NTWD, which received the Security Council of Japan and Cabinet
approval the following December.

This Japan-US Joint Technological Study targeted four aspectsof the NTWD SM-3 interceptor missile, including the nose cone, kinetic warhead, infra-red seeker,
and second stage rocket.

According to the Chief Cabinet Secretary Statement on joint Japan-US

technology study of Ballistic Missile Defense in December 1998, transition from technical research
stage to development, and then deployment stages would be determined separately “after
thorough review of the technological feasibility of BMD as well as the concept of Japan’s futurenational defense.”

Behind such a cautious approach to the joint technology study seemed to be

the intention of the Japanese Government to retain flexibility in future policy-making.

3)

Building and Joint Development of Ballistic Missile Defense (BMD)

Upon the US decision to deploy an initial MD capability in December 2002 as well as the results ofthe various tests on missile defenses, the Japanese Government determined that BMD had hightechnological feasibility.

As BMD would be more suitable to Japan’s exclusively defense-oriented

policy, the Japanese Government decided4 to introduce BMD at the Security Council of Japan andCabinet Meetings of December 2003.

Tables 4-1 and 4-2 show the results of PAC-3 launch tests and their operation during the Iraqi War.
Table 4-3 shows the results of the tests of SM-3.

Kawakami and Jimbo, “Ballistic Missiles Defense and Japan-US Alliance,” p. 269.
The fact that Japan was the first US allies to decide on the procurement of multi-layer BMD system wasdescribed in Ronald T. Kadish, Director, Missile Defense Agency, “Statement,” Before the Senate Armed
Services Committee, March 11, 2004.

3
4

－55－

Table 4-1 Result of Launch Tests (PATRIOT PAC-3)
Test date

Name of the tests

TargetResultMar. 21, 2002

OT/DT-1

HERA Ballistic Missiles◎Success

Apr. 25, 2002

OT/DT-4

Reconfigured PAAT (Patriot)△Failed to destroy
warheads

May 29, 2002

OT-2

HERA Ballistic Missiles (equipped with reentry ◎Success
body)Mar. 4, 2004
Sep. 2, 2004

Nov. 18, 2004

Sep. 8, 2005

DT/OT-11

DT/OT-12

Test

after

PAAT (reconfigured Patriot)◎Success

PAAT (reconfigured Patriot)◎Success

MQM-107 ( simulated cruise missiles)◎Success

PAAT (reconfigured Patriot)◎Success

STORM◎Success

revising PAAT (reconfigured Patriot)◎Success

software
PAAT: Patriot as a Target DT: Development Test OT: Operation Test

Table 4-2 Use of Patriot Missiles during the Iraqi War (Against ballistic missiles)
Launched date

Launching Troops

TargetResult (Some of them estimated by MHI)

Mar. 20, 2003

No. 101 Airborne Division Ababil-100◎Shot down, using PAC-2×1, and GEM×2

US ArmyAbabil-100◎Shot down, using PAC-3×2

US ArmyAbabil-100◎Shot down, using GEM×1

Mar. 21, 2003

Kuwaiti Army

TBM

◎Shot down, using GEM×3

Mar. 25, 2003

Kuwaiti Army

Al-Samoud◎Shot down, using GEM+×1

Mar. 26, 2003

Kuwaiti Army

TBM

◎Shot down, using GEM×1

Mar. 27, 2003

US ArmyUnknown◎Shot down, using GEM×2

Mar. 29, 2003

Kuwaiti Army

TBM

◎Shot down, using GEM×1

Apr. 1, 2003

US ArmyTBM◎Shot down, using PAC-3×1

TBM: Theater Ballistic Missile GEM: Guidance Enhancement Missile PAC: Patriot Advanced Capability－56－

Table 4-3 Result of Launch tests (SM-3)
Test Date

Test Names

Targets

ResultJan. 15, 2002

FM-2

Aries Ballistic Missile Target◎Direct Hit

June 14, 2002

FM-3

◎Direct Hit

Nov. 21, 2002

FM-4

◎Direct Hit

June 17, 2003

FM-5

× Captured Target but failed to hit it

Dec. 11, 2003

FM-6

◎Direct Hit, altitude 137 km, relative velocity 3.7
km/sec◎Direct Hit

Feb. 24, 2005

FTM04-1

Short Range Target Missile

Nov. 17, 2005

FTM04-2

Target with separated warheads ◎Direct Hit

Mar. 6, 2006

JCTV-1---◎ (Succeeded using a nose cone developed fromJapan-US Joint Research

FM: Flight Mission, FTM: Flight Test Maritime, JCTV: Joint Control Test Vehicle(Table 4-1 to 4-3 are from Defense Technology Journal <http://www.mda.mil/mdalink/html/newsrel.html>)

The Japanese Government explained its need and purpose of missile defense as follows: inrecognition of the need for comprehensive measures against the proliferation of weapons of mass
destruction (WMD) and ballistic missiles and in consideration of the urgency with which theinternational community must respond to such proliferation, new threats including the activities
of international terrorist groups, and various situations that may affect peace and safety, Japan
will systematically coordinate increased diplomatic efforts and effective use of Japan’s defense
capability, while solidifying the Japan-US security arrangement.

While the direct purpose of BMD system development is to intercept ballistic missile flying toward
Japan, the statement indicated that Japan also expected benefits such as: ① preventing theproliferation of WMD; ② implementing strategic deterrence against ballistic missile attacks; and③ contributing to the US MD efforts.

A Chief Cabinet Secretary statement announced the same day in December 2003 explained thatJapan would develop a new National Defense Program Guideline and Mid-Term Defense Program
and, since BMD systems had high technological feasibility and were suitable for the exclusively
defense-oriented policy of Japan, the Japanese Government would consider developing anddeploying a multi-layer defense system consisting of the Aegis BMD and Patriot PAC-3 systems.

In the separate table attached to the National Defense Program Guideline adopted in December－57－

2004, the core units with major equipment applicable for BMD are four Aegis ships and threeground-based Anti-Ballistic Missile Groups.

Based on this Guideline, Mid-Term Defense

Program (Fiscal Year 2005-09) was made and its yearly procurement program has been
implemented.

The budget for BMD System procurement has been allocated since FY 2004 (under

the former Mid-Term Defense Program) as indicated in Table 4-4.

Table 4-4: Ballistic Missile Defense related budget in Japan (fiscal 2004 to fiscal 2006)
Fiscal Year

OutlineFY 2004

Procurement of BMD system (92.2 billion Yen)

Gross

・

Sea-based upper-tier weapon systemamount 106.8¾

Refit Aegis system with BMD capability (one ship)

billion yen¾

Acquire SM-3 missiles

・Land-based lower tier weapon system
Refit Patriot systems with BMD capability (one ground-based Anti-Ballistic¾
Missile Group)¾

Acquire PAC-3 missiles

Improved BADGE systems, study of future BMD systems (14.6 billion Yen)・¾
・

Command, Control and Communications System
Add Ballistic Missile response functions to BADGE system
Japan-US Joint Technology Research¾

Japan-US Joint Technology Research on future sea-based upper-tier system.

¾

Comprehensive survey and study on Japan’s anti-air systems¾

Participation in international BMD conference

Strengthened promotion of BMD systems
・To promote BMD, a new Office of Ballistic Missile Defense was established under the

Defense Policy Bureau of JDA to strengthen implementation of policies related to BMD measures.

FY 2005
Gross

・

Improve Patriot systems (one fire unit), and acquire PAC-3 missiles.

・

Improve BADGE systems, and study future BMD systems

・

Reinforce a system to promote BMD

Procurement of BMD systems (119.8 billion Yen)amount・

119.8 billion Yen.

¾

Refit Aegis system with BMD capability (one ship)¾

Acquire SM-3 missiles¾

Launch tests of SM-3 missiles

・Sea-based upper-tier weapon systems

Land-based lower-tier weapon systems－58－

Refit Patriot systems with BMD capability (one ground-based Anti-Ballistic¾
Missile Group)

Acquire PAC-3 missiles¾
・Command, control and communications system¾

Add Ballistic Missile response functions to BADGE system¾

Develop Tactical Data Exchange Systems (TDS)

Study on future BMD systems (one billion Yen)・FY 2006
Gross

Japan-US Joint Technology Research¾

Japan-US Joint Technology Research on future sea-based upper-tier systems¾

Participation in international BMD conference

Procurement of BMD systems (136.1 billion Yen
amount139.9 billion Yen

・Sea-based upper-tier weapon systems¾

Refit Aegis system with BMD capability (one ship)¾

Acquire SM-3 missiles¾

Launch tests of SM-3 missiles

・Land-based lower-tier weapon systems
Refit Patriot systems with BMD capability (one ground-based Anti-Ballistic¾
Missile Group)¾
・

Acquire PAC-3 missiles
Sensors¾

Develop new early warning radar (FPS-XX)¾

Improve the capability of FPS-3¾

Operational research using FPS-XX trials

・Command, control and communications system¾

Develop TDS

Research and development of future BMD systems (3.8 billion Yen)・¾

Japan-US Joint StudyJapan-US joint development of interceptor missiles with improved capability for

Ballistic Missile Defense¾

Japan-US joint study to improve capability of ship-based anti-air radar andtheater command systems¾

Participate in international BMD conference(Reference) Japan Defense Agency “Defense Power Development and the Outline of its Budget for FY 2006 (proposal)” p.6;
Japan Defense Agency “Defense Power Development and the Outline of its Budget for FY 2005 (proposal)” p.8; Japan
Defense Agency, “Defense Budget for FY 2006 (proposal)” p.11 (all are written in Japanese).

－59－According to the original program, Japan aimed to introduce PAC-3s in FY 2006, add four Aegis
ships with BMD capability, 16 PAC-3 Fire Units, four FPS-XX units, seven FPS-3 Mod (withimproved capability) units, and develop a BM/C4I system that will integrate all of these elements.5

When North Korea launched its ballistic missiles in July 2006, Japan already had Aegis ships,
EP-3 electronic intelligence aircrafts, P3-C patrol aircrafts, and YS 11-E electronic reconnaissanceaircrafts.

With them and the added capability of already tested FPS-XX radars for monitoringballistic missile movements, Japan was able to successfully track the most of trajectories of firedballistic missiles, but it did not have intercept capability and was still on the way to developing its
BMD system as a whole.

In response to the North Korean missile launches, the then JDA Director-General Fukushiro
Nukaga announced changes in Japan’s BMD development plan.

PAC-3, scheduled to start

operation from 2007, will be deployed to Iruma Base (Saitama Prefecture) as soon as possible in
FY 2006.

PAC-3 deployments to Kasumigaura (Ibaraki Prefecture), Narashino (Chiba

Prefecture) and Takeyama (Kanagawa Prefecture), originally scheduled by the end of FY 2007
have been moved up several months.

In addition, the Japanese Government is considering an

acceleration of PAC-3 deployments to Hamamatsu (FY 2008), Chubu-Kinki (FY 2009) and Kyushu(FY 2010) Region.

For Aegis BMD, the plan is to equip one Aegis ship per year with BMD

capability, starting from FY 2007.

Thus completion of the overall plan for introducing BMD

systems may be moved up FY 2011. 6

Moreover, Japan will also consider an accelerated

introduction of the FPS-XX radar, originally intended to begin from FY 2008 and continue for four
years to establish four radar monitoring sites.

SM-3 (Block 1A) and PAC-3 missiles are being introduced through Foreign Military Sales (FMS)
from the US.

Given the current situation with North Korea, it is appropriate for Japan to importthese missiles as it urgently needed to develop BMD capability.

In case of PAC-3, Japan and US

signed a licensed production MOU in March 2005.

Japan also decided to advance Joint Technology Research on SM-3 that started in 1999 to SM-3
Cooperative Development (SCD).

The related statement of the Chief Cabinet Secretary notedthat as a result of Japan-US Joint Technology Research, initial technological difficulties wereabout to be resolved, and the Cabinet found it more appropriate to promote the Japan-US Joint
Development on improved BMD missiles more effectively, while also considering continued fiscal
56Japan Defense Agency, Defense of Japan 2005 White Paper, p. 149 (in Japanese).
See Yomiuri Shimbun, July 8, 2006; Yomiuri Shimbun August 5, 2006.

－60－

difficulties.

It also made it clear that transition into deployment would be determined on theoutcome of the SCD and other factors.

For SCD, Japan is to develop a nose cone for the improved

SM-3 Block IIA missile, second and third stage rocket motors, and the upper and lower separating
segments (the flight control section) of the second stage rocket motor.

The infra-red seeker,

kinetic warheads, and overall system design will be developed jointly (US lead), and the US willdevelop the missile guidance segment, boosters, and system integration.7

In its FY 2006 budget

request, JDA allocated about 3.8 billion Yen for SCD.

One specific feature of this SCD program is Japan’s adoption of a “spiral development” approach.
Despite the fact that tests based on Joint Technology Research had only taken place in early 2006,
Japan has gone ahead on transition to Joint Development, which reflects the actual application of
the spiral development concept.

4)Japan’s Plan to Procure and Operate Ballistic Missile Defense (BMD) Systems

a. Concept of Procuring and Operating BMD Systems
Japan decided to deploy multi-layered BMD system to intercept ballistic missiles by Aegis ships in
the mid-course phase and by Patriot PAC-3 in the terminal phase.

In addition, Japan will havesensors to detect and track ballistic missiles approaching Japan, and command, control andcommunication systems to effectively link weapons and sensors for systematic response to ballistic
missile attacks.

b. Sensors
Sensors for Japan’s BMD system include FPS-3 Mod (upgraded domestically produced radar),FPS-XX radars developed for BMD, and SPY-1 radar on Aegis ships.

In addition, a US mobile

X-Band radar has been deployed to the Air Self-Defense Force (ASDF) Shariki Base in Aomori,Northern Japan.

(i) Existing Radars (improved): FPS-3 ModThis will add BMD capability to FPS-3, search radar used by the ASDF with L-Band and S-Bandantennas.

Seven FPS-3 units are to be upgraded.

(ii) New Radar (under development): FPS-XX
This is a three-dimensional active phased array radar with capability against ballistic missile andstealth aircraft targets.

7

This radar was developed and tested during 1999-2003 by JDA’s

See Tokyo Shimbun, December 24 (evening edition); Asahi Shimbun, December 25, 2005.

－61－

Technical Research and Development Institute (TRDI).
2006.

Four sets are to be deployed from FY

Following the North Korean missile launches in July 2006, JDA decided to keep the

FPS-XX being used for demonstration tests in Asahi City, Chiba Prefecture, to monitor ballistic
missile launches.

(iii) Aegis Radar: SPY-1
This three dimensional phased array radar is used on Aegis ships.

It can be used to not only

detect and track ballistic missiles but also provide fire control for intercepts.

Although Japan’s

four Aegis ships already in active service have some capability to detect and track ballistic missiles,
they are being modified to add weapons control capabilities for introduction after FY 2007.

Some

US Aegis ships deployed to Japan will have BMD capability as well.

(iv) X-Band Radar: FBX-T
This US three-dimensional X-band active phased array radar can detect, track, and classify
ballistic missiles.

This mobile radar is transportable by C-130 and ground vehicle.

Japan andthe US agreed to deploy this radar to the ASDF Shariki Air Base (Aomori Prefecture) from thesummer of 2006 (actual deployment from June 2006).

c. Weapons
Weapons include Aegis BMD for mid-course defense and Patriot PAC-3 for terminal defense.

The

US has already deployed Aegis BMD to Japan, and Patriot PAC-3 will deploy soon.

(i) Aegis BMD
Aegis BMD uses the Standard Missile 3 (SM-3), a three-stage missile with over 1000 km rangethat is said to be capable intercepts up to the 200 km or higher altitude.
intercept ballistic missiles in outer space during mid-course flight.

SM-3 is designed to

It uses inertial guidance for

initial and mid-course flight and infra-red sensors for terminal phase guidance.
kinetic energy warhead for “hit-to-kill” intercepts.

SM-3 uses a

Aegis BMD upgrades are being installed inJapan’s four Aegis ships for deployment from the end of FY 2007.

The US will meanwhile

increase its Aegis BMD force with deployment of the missile intercept-capable Aegis cruiser Shiloh
to Japan from August 2006.

(ii) Patriot PAC-3
Patriot PAC-3 intercepts ballistic missiles at the terminal phase of their flight within theatmosphere. As in the case of Aegis BMD, it uses “hit-to-kill” technology and is compatible withconventional Patriot PAC-2 (four can be loaded into one PAC-2 container).

－62－

JDA plans to add

PAC-3 capabilities to 18 Patriot Fire Units (16 for actual deployment and two for education andtraining).

The US has been deploying PAC-3s to Okinawa since 2006.

d. Command, Control, Battle Management & Communications (C2BMC) systems
Command, Control, Battle Management & Communications (C2BMC) systems consist of JADGE,
Aegis combat systems and Patriot ECS.

(i) JADGE
JADGE (Japan Aerospace Defense Ground Environment) has improved capability with added
BMD functions over Japan’s conventional command and control system for air defense (BADGE).
Combined with the Air Defense Command System (ADCS), and Tactical Network Communication
System (TNCS), JADGE will perform C2BMC for ballistic missile defense.

The C2 function of

BMD is centralized and linked to the Air Operations Control Center (AOCC) used by the JASDF
Air Defense Commander who will be the Joint BMD Task Commander of all SDF assets assigned
to BMD.

JADGE is designed for control over Aegis combat systems and Patriot ICC (Information

Control Center) as well.

(ii) Aegis Combat System
The Aegis Combat System integrates various maritime operations carried out by Aegis ships withthe additional function of BMD.

This system consists of the Aegis Display system, Weapons

Control system, Decision Making system, and integrates command and control of sea-based sensor
and weapon systems including the SPY-1 radar and SM-3 missiles.

(iii) Patriot ECS
Upon the receipt of an order from the ICC (Information Control Center) at each ground-based
Anti-Ballistic Missile Group, the Patriot ECS (Engagement Control Station), the core system of
the Patriot Air Defense System, will control radar, detect and identify targets, determine the orderof engagements, and carry out missile defense operations under various modes.

e. Satellite information
Data warning of ballistic missile launches will be obtained from Japan’s information collecting
satellites and US early warning satellites.

(i) Information Collecting Satellites
In response to the launching of Taepo Dong 1 from North Korea in August 1998, Japan decided to
introduce four information collecting satellites: two optical satellites with 1 meter resolution and－63－two radar satellites with 1 to 3 meters resolution.

In 2003 Japan launched two satellites (oneoptical, and one radar), and the other two were launched in FY 2006.

Due to its Diet Resolution

on the Peaceful Use of the Space, the resolution capability of Japan’s information collecting
satellites are about the same as available commercial satellites.

They are operated by Cabinet

Satellite Information Center under the Cabinet Information Office.

(ii) Early Warning Satellites
Any information on ballistic missile launches detected by US early warning satellites (DSP
satellites) would be used as Shared Early Warning (SEW) for cueing the early detection oflaunches by land and sea-based radars.

Japan currently lacks such capability.

f. Operational Flow from the Detection to the Interception of Missiles
Information indicating ballistic missile launches would be conveyed from US Forces to the JDA
Central Command Post and JASDF AOCC, and then to the Prime Minister’s Office, relevant
government agencies, and relevant SDF departments.

Considering this and other relevant

information, the Prime Minister and relevant Ministers would issue response commands based on
pre-determined “response procedures.”

The Joint BMD Task Commander would determine thepreparation and order of responses and send orders to unit commanders, while coordinating BMD
operations with US Forces at the BJOCC.

There are two different command and control methods of response against incoming ballistic
missiles.

Under the “centralized method,” all target information is aggregated at the AOCC.

Target information from FPS-3 Mod, FPS-XX and US Forces X-Band radar is conveyed to the
AOCC through the TNCS.

Any information from Aegis ships is conveyed to the JADGE AOCC

through communication satellites and AWACS using LINK16.

JADGE then conveys suchinformation to other sensors and weapons, while also connecting to US Forces through the ADSI(Air Defense Systems Integrator).

JADGE compares the information on missile position, velocity,

angle, etc. with stored data on the trajectories of various missiles to determine the expected area
and time of impact.

Then, JADGE uses this calculation to determine what degree of threat themissile(s) will pose to Japan and, if determined to be a threat, select the most appropriate weapons
and issue the intercept command.

Based on that command, Aegis ships launch SM-3 missiles for

mid-course intercept while Patriot PAC-3 units intercept at terminal phase, and determine theresults.

Under the “decentralized method,” target information is shared within C2BMC with the AOCC asa core, as in the case of the centralized method.

But, rather than issue an intercept order, the－64－AOCC delegates intercept authority to the commanders of Aegis ships and/or PAC-3 units, inaccordance with launch procedures predetermined by the Joint BMD Task Commander.
those commanders intercept incoming missile(s) at their own discretion.

Then

In such cases,

commands issued from the AOCC would be “negative control,” so commands would be “hold fire” or“self-destruct” interceptor missiles already launched.

Whether to adopt centralized or decentralized method will be determined depending on thestrategic or tactical environment and the missile defense posture of Japan.

2.

Problems and Solutions for Ballistic Missile Defense

1)

Accurate and Quick Response

Since ballistic missiles fly at extremely high speed, defense against them will require an extremely
accurate and quick response.

The time of flight to target for ballistic missiles is usually several

minutes to several tens of minutes depending on the types of missiles and the distance to target.
For example, in the case of the SRBM Scud missiles launched during the Gulf War in 1991 it took
about two minutes from the time of detection by satellites to the issue of early warning
information ― only about two minutes before the missiles hit the ground.

It took about 10

minutes for the North Korean Taepo Dong 1 missile launched in 1998 to reach Japanese air space.

BMD for Japan, basically designed to respond against theater ballistic missiles with relatively
short flying times, needs to respond in similar situations.

Therefore, Japan should establish a

BMD system at a level of operational readiness that can provide accurate and quick response
within 10 minutes from missile detection to interception.

For this operation, it is necessary to

implement early warning of launching, classification and identification, and distribution of
warning and data using information obtained through various sensors such as satellites andradars.

a. Use of Satellites
Since the time from detection to interception is extremely short, it is very important to detect thelaunching of ballistic missiles as early as possible.

Detection requires a broad monitoring

network in constant operation and early detection of incoming ballistic missiles is difficult forland-based radars.

This is why it is essential to use satellites that can monitor constantly.

The

US implemented a Missile Defense Alarm System (MIDAS) program during the Cold War, andlaunched Defense Support Program (DSP) satellites in geo-stationary orbits to monitor Soviet andChinese ballistic missile launchings.
launches in July 2006.

DSP satellites first detected the North Korean missile

For the future, the US plans to launch SBIRS (Space Based Infrared－65－

System) satellites and is also working on the development of a Space Tracking & Surveillance
System (STSS) that has infra-red sensors covering wider and narrower range bands: the wider
range sensor to detect heat sources from missile launch, and the narrower range sensor to track
objects with higher precision.

Japan planned to launch two out of four information gathering satellites with optical and radar
sensors in FY 2006.

However, as the US has already established a strong information collecting

capability through space-based sensors like DSP, it is impossible for Japan to the supersede US
network on its own for the foreseeable future.

Therefore, effective operation of BMD in Japanrequires closer linkage with the US to share information on ballistic missile launches.

b. Use of Various Radars
As noted above the US X-Band Radar was installed at Shariki Air Base in June 2006.

The USdeveloped this X-band radar to protect its overseas forces, and those allied and friendly countries,
through detection of incoming ballistic missiles.

Using Boost Phase detection and tracking, it canalso alert BMD systems to ballistic missiles approaching US territory.

FPS-XX is a land-based early warning radar developed by Japan.
2009 till 2012.

Four are to be deployed from

Until completion of FPS-XX deployments, the US X-band radar will be the only

land-based radar in Japan that can detect ballistic missiles over a broad range.

Because of its specific wavelength features, the X-band radar complements the functions of
FPS-XX.

X-band radar is used exclusively for ballistic missile detection.

FPS-XX, on the other

hand, uses a lower wavelength band to detect and track aircraft as well as missiles.

Thus

FPS-XX has better capability to continuously monitor airspace, but is not as precise as X-bandradar.

Moreover, X-band radar can discriminate between real warheads and decoys, but tends tobe more affected by weather than the FPS-XX radar.

Since both types of radars havecomplementary performance, effective BMD operations should combine the use of both.

Deploying X-band radar in addition to FPS-XX will improve the accuracy of information throughmultiple sensors with different performance.

This will raise the certainty of missile interception,

as well as enable the calculation of expected impact area and time more quickly and accurately.
Moreover, since incoming ballistic missiles may carry decoys, it is important to identify which
incoming objects are real warheads.

In this respect, X-band radar is extremely efficient and canincrease interception probabilities.

－66－

The final report of Japan-US Security Consultative Committee (SCC: “2+2”) in May 2006 statesthat SM-3 armed US Aegis ships will be deployed around Japan within 2006.
accelerated in reaction to the North Korean missile launches.
equipped with BMD capability will deploy in FY 2007.

This plan has been

The first Japanese Aegis ship

By distributing target data obtained by

X-band radar to Aegis BMD ships, it become possible to detect missiles launchings earlier than byuse of their SPY-1 radars alone, and thus raise the accuracy, precision, and timeliness of missileinterception.

The target data obtained by X-band radar will be distributed to Patriot PAC-3 sites

at the same, thereby further raising the overall interception probabilities.

c. Functional C2BMC System
Information from SBIRS and STSS satellites, added to data from X-band radar and other sensors,
will further improve the likelihood of ascertaining the launch and flight of ballistic missiles.
However, the ultimate objective of BMD is to neutralize the incoming missiles.

Therefore, thenext important matter following the detection is Command, Control and Communications (C3).
For C3 functions of BMD in Japan, it is necessary to establish a system in which information onballistic missile launches is collected and analyzed immediately at the Japan-US Bilateral Joint
Operation Coordination Center (BJOCC ― to be described later), so both countries can coordinate
operations at the earliest possible time.

Moreover, to assuredly intercept ballistic missiles, it isnecessary to build a system that can communicate precise position data of incoming missiles
continuously and at real time to interception units.[See details of C2BMC in Chapter 7 of Part 2.]

2)

Japan-US Joint Operation and Burden of Missions and Roles

Under the Japan-US Security Treaty, “[e]ach Party recognizes that an armed attack against either
Party in the territories under the administration of Japan would be dangerous to its own peaceand safety and declares that it would act to meet the common danger in accordance with its
constitutional provisions and processes” (Article 5).
respond to any attack on Japan.

Therefore, Japan and the US are to jointlyThis has been the basis of joint Japan-US operations, yet

whether the Japan-US security arrangement will effectively function in a time of emergency will
depend on the effectiveness of joint actions by the Self-Defense Forces and US Forces.

Japan andthe US have defined joint operational responsibilities under the “Guidelines for Japan-US Defense
Cooperation,” and continue to prepare procedures, as well as improve the effectiveness of joint
operations through training and exercises.

Japan and the US are reviewing joint BMD operations on the presumption that each country willuse its own command system.

The review has defined how US Forces are to cooperate with Japanin BMD operations and will in the future study such issues as: ① defining details of command and－67－

control including operation of the Bilateral Joint Operations Coordination Center (BJOCC) andthe Common Operational Picture (COP) based on differences in Japan and US command andcontrol systems; ② information sharing and systems linkage; ③ procedures for prompt
communication of launch information; ④ coordinated defense procedures; ⑤ Japan-US role
sharing in damage control and repairs; ⑥ coordination with relevant ministries and agencies on
air transportation control and frequency allocation; ⑦ procedures for training and exercises; and⑧ acquiring US information for developing Japanese systems.

Consideration of Japan-US role sharing needs to focus especially on collecting and analyzing
information, and intercepting missile attack.

For information collecting and analysis, bothcountries need to share information obtained through various sensors that each country possesses.
Japan should rely on the already established capabilities of the US for collection and analysis ofstrategic information at the moment.

However, through information sharing Japan needs to gain

the know-how needed for more autonomous capability in truly joint operation between Japan andthe US.

For example, Japan and the US need to complement each other in the area of

information gathering by land-based radars.

For interception, the situation will differ depending on what capability Japan is to acquire, andwhat kind of units the US will deploy around Japan.

Considering current policy and technology

trends, it may be more efficient if boost phase operations are carried out mainly by the US, while
mid-course defense is handled jointly and terminal phase operations are conducted mainly by
Japan (other than some US operations to protect US bases).

The overall architecture for BMD has not yet been defined, even in the US.

It is highly likely that

defense systems will be deployed gradually as their technologies become feasible.

Since entire

BMD systems cannot be developed overnight, Japan needs to consider at least an overall direction
for system development, such as what capabilities it must possess and how to share roles andmissions with the US, to make BMD truly effective.[See details of Japan-US Joint Operations in
Chapter 6 of Part 2.]

3)

Autonomous Execution of Operations

We must bear in mind that even if we develop a monitoring network and necessary C3 systems, itwill not be possible to defend Japan should there be any reluctance in the national will to engage
ballistic missiles.

It is true that Japan-US joint operation must be for Japan’s BMD, but action to

respond to missile attacks must be for Japan to decide at its own discretion.

For Japan to rely on

US judgment for such a decision would be to renounce its independence as a sovereign state.

－68－For “autonomous execution” of ballistic missile defense, it is vital that advance review include
crisis management and situation control measures not only for interception of ballistic missile
attacks against Japan, but also in the case of accidental or politically motivated launchings ofballistic missiles.

As described before, it is not easy to analyze data on tracking, classification,and identification of ballistic missiles after their launch, further shortening the time available fordecisions.

Given the possibility of intercepting ballistic missiles targeting a country other thanJapan, or defense against space launch vehicle (SLV) loading satellites, Japan should also
contemplate crisis management and situation control measures for these cases.

It is also

necessary to delegate authority significantly to JDA and Self Defense Force units to allow
immediate and appropriate responses under tense situations.

4)

Full Development of Joint Operation of SDF

In April 2002, the JDA Director-General ordered each Self-Defense Force Chief of Staff to review
joint operations.

The review indicated a need to “transform current readiness based on the

independent operation of each Self-Defense Force to readiness based on joint operations” and “tounify activities supporting the Director-General from a purely military viewpoint on SDF
operations.”

Reflecting such recommendations, the Japanese Government determined that, aspart of its new National Defense Program Guideline adopted in December 2004, it would
strengthen joint operations by improving the efficiency of existing organizations, while
establishing a Chief of Joint Staff position, and reorganizing each Staff Office.

On the basis of

this decision, the former Joint Staff Council has been reorganized as the Joint Staff Office.8

Thus SDF operations will be conducted entirely as joint operations from 2006.

For any major

event, each Self-Defense Force is to organize a joint service unit, and assign an appropriate
commander depending on services required.

For example, in the case of BMD, the Commander ofthe ASDF Air Defense Force will be assigned as the Commander of a Joint BMD Task Force.

Or,in the case of an earthquake, one of the District Commandants of the Ground Self-Defense Force,or in case of an invasion of an offshore island, the Commander of the Self-Defense Fleet willcommand the joint unit.

In case of joint operation with US Forces, each SDF was to respond individually to joint US Forces
and adopt joint coordination when needed.

With the shift to Japan’s joint operation, SDF and USForces are to jointly respond to major events, based on operational plans that embody joint views

8Japan Defense Agency, Defense of Japan 2005 White Paper, pp. 123-127.

－69－

independently determined by each side under the initiative of the Joint Staff Office.

Japan’s BMD system will include early warning radar units, land-based PAC-3 units of the ASDF
and MSDF “BMD Maritime Units” including Aegis ships with SM-3 missiles, under the commandof the Joint BMD Task Commander, who is the ASDF Commander of Air Defense Force.

This

entire system will be controlled by the ASDF JADGE system which will have added BMD
functions.

Although Japan is developing a joint operation system for BMD, its actual procedures must still be
addressed.

For example, staff organization to assist the Joint BMD Task Commander should be

reinforced.

To ensure implementation of BMD operations, plans should be verified using

peacetime training and simulations.

It will be essential to ensure that GSDF and MSDF

personnel will be constantly available for emergencies, as well as to staff the Joint BMD Task
Command.

Moreover, Joint Chiefs of Staff personnel must be ready to serve at the Japan-US

Bilateral Joint Operation Coordination Center (BJOCC).

On the other hand, current reinforcement of the SDF “joint system” is limited to operational
matters.

The new Joint Staff Office does not have authority to handle personnel affairs andbudget planning.

Since the Joint Staff Office is responsible for the management of various

projects as well as operational needs related to joint operations including BMD, it is doubtful if anorganization with necessary authority in personnel and budget matters can smoothly enable atruly joint system.

This issue requires future consideration.

－70－

Chapter 5
1.

Issues and Measures of Policies

Position of Ballistic Missile Defense (BMD) in National Security Policies

The primary duty of ballistic missile defense in Japan is to protect the lives and assets of Japanesepeople against ballistic missiles attacks as indicated in the decision by the Security Council ofJapan and the Cabinet Council in December 2004.1

The National Defense Program Guideline for

Fiscal Year (FY) 2005 and Beyond adopted in December 2004 (hereinafter referred to as “the new
Defense Guideline”) states that “Japan will establish the necessary defense force structure,including the introduction of ballistic missile defense systems, to cope effectively with ballistic
missile attacks,” one of the new threats and situations that Japan may face.

These statements clearly indicate Japan’s will to defend itself from ballistic missile attacks, butthere are many policy issues that must be addressed to actually establish necessary systems.

The

Japanese government’s efforts to resolve such issues have offered a good opportunity to departfrom the “theological debate” of national security policies in the past, thereby driving Japan to“reform” its national security policies in a manner more fitting with today’s security environment.
However, many policy issues remain unresolved. It is increasingly necessary for Japan to fully
address issues not only in terms of ballistic missile defense but also in view of its overall national
security.

One notable aspect of ballistic missile defense is that it could be construed as a weapon systemthat might affect the regional and international strategic environment because it is a measure tointercept strategic weapons, i.e., ballistic missiles.

In this view, BMD could be called the very

first weapon system with strategic implications that Japan has possessed since the end of WorldWar II.

Moreover, its introduction imposes a tremendous cost burden.

Since BMD is such avaluable defense asset, Japan must use it “strategically” for establishing appropriate national
security policies and building a more favorable security environment.

2.

Legislative Aspect

1)

Ballistic Missile Defense (BMD) and the Right of Self-Defense

Article 9 of the Japanese Constitution stipulates that “the Japanese people forever renounce war
as a sovereign right of the nation and the threat or the use of force as means of settlinginternational disputes” (item 1), and “land, sea, and air forces, as well as other war potential will
never be maintained” (item 2).

The Government’s interpretation of Article 9 has been that it does

Decision of the Security Council of Japan and the decision of the Cabinet Council “On Introduction ofBallistic Missile Defense System and Other Measures,” December 19, 2003.

1

－71－

not deny the right of self-defense as a sovereign state; thus Japan clearly possesses the right ofself-defense against armed attacks and possession of a minimum level of armed strength isallowed under the Constitution.2 Requirements in exercising the right of self-defense allowed
under the Constitution are the following: ① there is an imminent and illegitimate act ofaggression against Japan; ② there is no appropriate means to deal with this aggression otherthan resort to the right of self-defense; and ③ the use of armed strength is confined to theminimum level necessary.

If ballistic missiles fly toward Japan and are recognized as armed attacks, then the SDF can
exercise the sovereign right of individual self-defense allowed under the Constitution.

On theother hand, it is theoretically possible that, though ballistic missiles are flying toward Japan, theirintent is not clear.
self-defense.

In such a case, it could be difficult for the SDF to exercise the right ofHowever, if they do not respond, Japan will suffer damage.

Therefore, it has

become necessary to allow SDF interception of ballistic missiles flying toward Japan even when astate of armed attack is unclear.

To enable the SDF to respond in such situations (under strict

civilian control), the Diet has passed revisions of the SDF Laws.

There are still further unresolved issues involved in the relationship between Japan’s BMD
system and the right of self-defense.
boost phase intercept.

Firstly, there would be the case where Japan engages in

It is difficult to determine accurately whether ballistic missiles aretargeted on Japan in their boost phase.

Thus there is a possibility that such intercept action

could be considered beyond that allowed under the right of individual self-defense.

Secondly, there is the issue of how BMD is related to the exercise of collective self-defense.

The

statement of the Chief Cabinet Secretary in December 2003 indicated that Japan’s BMD system isessentially aimed at defending Japan, will be operated at Japan’s own discretion, and will not be
used to defend a third country.

Therefore, the issue of collective self-defense right will not emerge.

For actual BMD operations, Japan and the US need to exchange military information more closelythan before.

The Japanese government asserts that providing information gathered for the

purpose of national defense is not deemed as the exercise of collective self-defense since it isnatural for Japan and the US to exchange mutually required information. At the time of theNorth Korean missile launches in July 2006, Japan and the US exchanged detailed information on
missile trajectories and impact locations.

The Japanese Government has maintained such an interpretation since the statement of Director-General
Seiichi Ohmura at the Budget Committee of the House of Representatives, 21st Session (December 22, 1954).

2

－72－

Therefore, the problem is the case where Japan uses its BMD system to intercept missiles targetedon the US or US forces.

The Japanese government’s position has been that “it is beyond doubt

that, as a sovereign state, Japan has the right of collective self-defense under existing
international law.

The government, however, is of the view that the exercise of the right ofself-defense as permissible under Article 9 of the Constitution is authorized only when the act ofself-defense is within the limit of the minimum level necessary for the defense of the nation.

Thegovernment, therefore, believes that the exercise of the right of collective self-defense exceeds that
limit and is constitutionally not permissible.”3

In other words, Japan is not allowed to intercept

ballistic missiles having the US or US forces as targets because that would be interpreted as an
exercise of the right of collective self-defense.

There are increasingly strong arguments in Japan that it may be more beneficial for Japanese
security, the Japan-US alliance, and the fulfillment of obligations in the international community
for Japan to change the interpretation of its Constitution, or to revise the Constitution itself, so as
to allow the exercise of the right of collective self-defense under certain conditions.

Prime

Minister Shinzo Abe has emphasized actively tackling the issue of changing the interpretation.
However, it will likely take considerable time before Japan can realize interpretational changes orrevisions of the Constitution.

If so, it would be worthwhile to consider to what extent Japan isallowed to use its ballistic missile defense in relation to the exercise of collective self-defense underthe existing legislative systems.

Concerning ballistic missile attacks against US forces in Japanese territory, Japan can intercept
such missiles as an exercise of individual self-defense because it concerns ballistic missiles
entering Japanese territory.

If the ballistic missile is targeted at US forces deployed adjacent to,but outside Japanese territories, Japan may also be able to use BMD systems as an exercise of its
individual self-defense right if the expected impact area would be close to where Japanese
Self-Defense Forces or Japanese ships operate.

On the other hand, those missiles clearly heading toward the US homeland are not likely to take a
track flying over Japan. (See Figs. 5-1 and 5-2)

Since the BMD system Japan is now deploying

will not be capable of intercepting longer range ballistic missiles such as ICBMs, there is only aslim possibility of Japan using BMD in a way that can be construed as an exercise of collective
self-defense.

3

However, it may be unreasonable to do nothing against such ballistic missiles.

Answers to the question raised by Member of the House of Representatives Ms. Takako Doi about the“Fundamental Policy upon the Start of Koizumi Administration,” presented on May 8, 2001.

－73－

Fig. 5-1 Ballistic trajectory from China

Fig. 5-2 Ballistic trajectory from North Korea

to the US homeland

to the US homeland(Figs. 5-1 and 5-2 from the “Ballistic Missile Defense Handbook,” Heritage Foundation)

According to Japanese media reports in January 2005, the Japanese government decided thatBMD deployed in Japan would limit their targets to ballistic missiles targeting Japan, and would
not intercept ballistic missiles flying over Japan toward other countries because of its
interpretation of the right of collective self-defense.4

However, JDA sources implied that if the

impact area could not be determined, Japan had no choice but to intercept the missiles.
Subsequent reports stated that the government started to contemplate a new interpretation of
Article 9, whereby the interception of ballistic missiles flying over Japan would not be an exerciseof collective self-defense even if the missiles were launched toward the US.5

It is not clear how

this contemplation is progressing, but Chief Cabinet Secretary Shinzo Abe told the Diet on April
17, 2006 that Japan is to follow the current interpretation that has been presented to Diet
committees in the past.6

On the other hand, to provide information to the US immediately on ballistic missile flights would
be a minimum obligation as an ally.

The government’s position on collective self-defense concerns

actual employment of forces, so the provision of information does not constitute the exercise of4
5Tokyo Shimbun, January 9, 2005.
Sankei Shimbun, January 14, 2005.

The statement of the Cabinet Secretary, Shinzo Abe, at the Special Committee on the Prevention ofInternational Terrorism and Japan's Cooperation and Support; Humanitarian Assistance for Reconstruction
in Iraq, the 164th session of the House of Representatives, April 17, 2006.
6－74－

collective self-defense.

This position has been repeatedly expressed at the Diet.

In view of the relationship between BMD and the exercise of collective self-defense, we must notforget that Japan does not possess nuclear deterrence capabilities but relies on the US extended
nuclear deterrence, or nuclear umbrella, under the Japan-US alliance.
change for the foreseeable future.

This is not likely to

In such a situation, exposure of the US homeland to ballistic

missile attacks would hinder the US deterrent covering Japan.

If Japan’s BMD system candetect, track and intercept longer range ballistic missiles that are clearly heading for the US,
allowing Japan to intercept such missiles will complement the US damage confinement capability
against nuclear ballistic missile attacks, thereby strengthening the credibility and reliability of
the US extended deterrence for Japan.

The credibility and reliability of extended nuclear deterrence is strongly affected by the closenessof relations between the providing and provided countries.

If Japan is important for the US insecurity and other terms, this will heighten the credibility and reliability of the US commitment toretaliate against any nuclear attacks on Japan.

It would not be appropriate for Japan tocompletely deny the possibility of intercepting ballistic missiles clearly aimed at the US homelandfrom the viewpoints of Japan’s national security and the Japan-US alliance.7

As seen here, BMD and the issue of collective self-defense are directly related and remain a major
challenge to Japan’s defense legislation.
systems are actually deployed.

Japan needs to resolve this issue before its BMD

As in the past, Japan may be able to provide a certain degree of

response through expanded and extended interpretations of the existing legislation.

However,that may not be a proper response as a constitutional state, and would hardly be healthy forJapan’s national security policies in the longer term.

2)

Revision of the Self-Defense Forces Law and the Law to Establish the Defense Agency

As underlined by the North Korean missile launches in July 2006, MRBMs such as No Dong can
hit Japan within 10 minutes of launching.

Interception of such missiles will require responses

within a very brief time and under extremely tense conditions.

There may also be cases ofapproaching ballistic missiles with unknown intent, in which case the government may not be able
to order SDF operations.

Even then it will be necessary to intercept such ballistic missiles toprotect lives and assets in Japan.

Regarding the credibility and reliability of extended deterrence, see Shinichi Ogawa, “Nuclear
Disarmament and ‘Nuclear Umbrella’”, Mitsuru Kurosawa (ed.), Disarmament of Weapons of Mass
Destruction (Tokyo: Shinzan-sha, 2004), pp. 42-46 (in Japanese) .
7－75－

In July 2005, the Diet adopted a revision to legislation permitting the SDF to conduct BMD
operations in a way that conforms to the characteristics of ballistic missile attacks, by adding an“Article 82-2” to the Self-Defense Forces Law that would allow the SDF to respond to ballistic
missile attacks even without the issuance of a governmental order for defense actions.

Moreover, when ballistic missiles approach Japan, it is essential that all three Self-Defense Forces
conduct operations jointly through a series of procedures that involve: the detection, tracking,classification, and identification of targets; decision on intercept; actual interception;
determination of results; decision on a possible second interception; and confinement of damage
from debris in case of successful interceptions, and from missile impacts in case of failed
interception.

In July 2005, Japan revised the Defense Agency Establishment Law at the sametime as the revision of the Self-Defense Forces Law, and established the Joint Staff Office to assist
the Director-General of the Defense Agency, thereby shifting to a more unified joint operational
structure.

In relation to BMD, the joint task units, which consist of relevant service units fromeach Self-Defense Force, shall be formed when needed under the command of the ASDF Air
Defense Command.

The shift to a more unified joint operation structure has been pursued under the recognition thateach Self-Defense Force must simultaneously share information and act under unified commandand control to systematically coordinate actions and effectively accomplish missions. 8Theintroduction of ballistic missile defense has undoubtedly accelerated this shift toward more unified
SDF operations.

The next important step is to develop regulations and procedures for proper

implementation of such legislation and establish procedures that would allow the Diet, thegovernment, and the SDF to fully coordinate their actions.

3.

Policy Aspects

1)

Budget for Ballistic Missile Defense and Cost-EffectivenessSince 2004 the budget for BMD system procurement has taken more than 10% of all annual JDA
procurement expenses.

The expense for BMD system procurement is expected to be enormous as

substantial quantities of extremely advanced technologies are required: sensors, C2BMC systems
and maintenance equipment in addition to missiles, and the refit of missile launch platforms suchas AEGIS ships and Patriot systems.9

The challenge is how to determine the proper budget forJapan Defense Agency, Defense of Japan 2005 White Paper, pp. 123-124 (in Japanese) .
Akio Shouno, “How to Pursue Defense Industry Policy,” DRC Almanac[http://www.drc-jpn.org/AR-7J/syouno-03j.htm] (in Japanese) .

8
9

－76－

2003,

2003

cost-effective BMD acquisition, and how to harmonize such expenses with other equipment
procurement needs as well as other national security-related expenses.

On the cost-effectiveness of BMD, we should consider the expected damages from ballistic missile
attacks, especially those using missiles armed with WMD warheads.

If such damage is prevented

or mitigated by deterring or intercepting attacks, even the enormous expenses required for the
BMD system would still be worthwhile.

Because Japan actually faces apparent threats ofballistic missile attacks, the BMD system is the only effective way to intercept such threats and, as
its technological feasibility has been demonstrable, Japan’s introduction of BMD can be called
rational in terms of cost-effectiveness.

Furthermore, BMD would provide various benefits in addition to interception of ballistic missiles.
It could deter missile launches, reduce motivation to acquire ballistic missiles or increase
stockpiles, and be a driving force to promote reform of national security and defense policies inJapan.

Conversely, because BMD will be extremely expensive to introduce, it should be put touse in a strategic and multi-purpose manner to maximize its effect.

At the time of North Korea’s

missile launches in July 2006, Japan responded quickly with active and effective diplomacy at the
UN Security Council.

Japan’s progress in introducing BMD, at least in tracking capability, wascertainly a factor that enabled such response.

On the other hand, Japan needs to consider the possibility that introduction of BMD may hinder
the development of other defense capabilities.

The new National Defense Program Guideline

states that “Japan’s future defense capability should be a multi-functional, flexible, and effective
force with a high level of readiness, mobility, adaptability and multi-purpose capability, and beequipped with advanced technologies and intelligence capabilities comparable to the global
military-technological level.”

In spite of this, procurement funding in the new Mid-Term Defense

Program is significantly reduced. Defense budgets are not likely to be increased for the moment,
making it difficult to procure equipment needed to develop “a multi-functional, flexible, andeffective force.”

Moreover, in the realignment of US Forces in Japan, the US is asking Japan tobear an expense of about 2 to 3 trillion yen, yet the Ministry of Finance says that all Defense
Agency requests count as defense-related expenses and no expenditures outside the defense
framework will be accepted.10

There is also pressure to review and further shrink the budget for

the Mid-Term Defense Program. After the North Korean missile launches in July 2006, Japan
started to accelerate BMD development. More funding is needed for this to become a reality.

10

Sankei Shimbun, April 27, 2006.

－77－

Determining the proper scale of Japan’s BMD system requires an estimate of threats Japan may
face in the future and consideration of the BMD capability Japan is to introduce.

However, as

previously explained, introduction of BMD must consider not only ballistic missile interception
measures in the context of the “Defense Capability” of the 5Ds, but also effective reduction ofballistic missiles threats by combining the other four Ds ―Dissuasion Diplomacy, Deterrence

Posture, Denial Power, and Damage Confinement ― while efficiently using limited resources.

As BMD is the most important issue embodying Japan’s “deterrence strategy” for the first time inJapan’s national security policies, Japan should allocate BMD funding, as well as expenses related
to the realignment of US Forces in Japan, in a separate framework outside the general defense
budget to enable full consideration of other national defense priorities.

2)

Three Principles on Arms Export

In 1967, Prime Minister Eisaku Sato presented the so-called Three Principles on Arms Export,
under which arms exports were to be prohibited to ① communist countries, ② countries towhich the exports of arms are prohibited by UN resolutions, and ③ parties involved or likely to be
involved in international conflicts.11

In 1976, the government of Prime Minister Takeo Mikiannounced even more strict regulations that restricted arms exports to any region, including those
not designated in the above Three Principles, and to include arms technologies as well as
equipment related to arms manufacturing.12

The basic concept of this prohibition on arms exports is that “Japan, as a peaceful country, is to
avoid promoting international conflicts by exporting arms.”13

However, excessive application ofthis export ban has not only obstructed Japan-US cooperation in defense equipment andtechnology, but also Japanese contributions in areas that would benefit peace and stability in theinternational community.
as an exceptional case.
the US.

In 1983, Japan exempted the provision of arms technologies to the US

However, Japan still could not transfer any hardware elements, even toThus Japanese-made components could only be used in Japan, thereby sky-rocketing thecosts of such parts. 14

11 The statement of Prime Minister Eisaku Sato to the Audit Committee of the House of Representatives, 55th
Session, April 21, 1967.
12 The statement by Prime Minister Takeo Miki to the Budget Committee of the House of Representatives,
during the 77th Session.
13 Ibid.
14 Katsuhiro Shigemura, “Mitigation of Policies to Prohibit Arms Exports, and International Equipment
Cooperation,” DRC Almanac 2004”, 2004 [http://www.drc-jpn.org/AR-8/shigemura-04j.htm] (in Japanese) .

－78－

In the case of BMD research, Japan confirmed that the provision of arms technologies underJapan-US joint technology research will be implemented under the framework of an agreement on
the provision of arms technologies to the US.15

However, it was acknowledged that some reviewof the Three Principles would be needed to advance to the next step of joint development.

In

December 2004, the Chief Cabinet Secretary’s statement on the new Natural Defense Program
Guidelines noted, “[i]f Japan decides that it will engage in joint development and production ofballistic missile defense systems with the US, …the Three Principles will not be applied, under thecondition that strict control is maintained, because such systems and related activities willcontribute to the effective operation of the Japan-U.S. security arrangements and are conducive tothe security of Japan.”

Although such exceptions to arms export principles have been restricted to exports to the US inregards to the BMD system, it is significant that Japan has been able to show flexibility inreviewing the application of the Three Principles policy.

Through such measures, it may become

possible to realize efficient production of SM-3s (or PAC-3s) through close coordination between
Japan and the US.

Moreover, if Japan and the US are to produce common equipment, then even

if one country faces a sudden problem in production, such as a drastic increase in demand or a
stoppage in production, the other country can provide production capability, making it possible forboth countries to adapt a more flexible production schedule.

For Japan’s defense industry, suchjoint development will provide an opportunity to supply products to the US and could reduce costs
through more efficient manufacturing.

Certainly, unrestricted exports of defense equipment and technologies cannot be allowed.

Strictcontrols on any exports of technologies and equipment to third parties must continue.

3)

Resolution for Peaceful Use of SpaceIn May 1969, Japan’s Diet adopted the “Resolution on the Fundamentals of Exploitation and Useof Outer Space” (hereinafter referred to as “Resolution for the Peaceful Use of Outer Space”),
which said that the exploitation and use of any objects launched into outer space or any rockets
that boost such objects must be restricted to peaceful purposes, to benefit advancement inacademic science and improvement in human welfare, while contributing to the development ofindustrial technologies and encouraging beneficial international cooperation.

Therefore, military

use of outer space has been prohibited not only for invasive purposes, but in principle for defensive
purposes as well.
Statement of the Chief Cabinet Secretary, “On Japan-US Joint Technology Study on Ballistic Missile
Defense (BMD),” December 25, 1998.
15

－79－

This resolution presents two major issues in relation to BMD.

One is that the Aegis BMD systemintercepts ballistic missiles flying above the atmosphere.

The Chief Cabinet Secretary’s

Statement on Japan-US joint technological research in 1998, referring to this point, noted thatwhile the Diet has discretion in determining its interpretation of this resolution, the Japanese
government believes that, considering the recent proliferation of ballistic missiles and the fact that
BMD is the only purely defensive method to protect the lives and assets of the Japanese people,
the introduction of BMD by Japan does conform to the objectives of the Diet resolution as well as
to the basic concept of Japan as a peaceful country.

Another matter lying between BMD and the peaceful use of space is the extensive use of satellites
in BMD operations.

The “peaceful purpose” stated in the Diet resolution is construed as“non-military” so that the SDF has been restricted on the use of outer space even for defensive
purposes.

In 1985, the Japanese government stated that the Self-Defense Forces were allowed touse general-purpose satellites or satellites having similar functions 16 (referred to as the“generalization principle”) so the SDF has been allowed to use communication satellites.

Upon North Korea’s Taepo Dong launch in 1998, Japan decided at the Cabinet meeting in
December 1998 to introduce four information collecting satellites with resolution capability
similar to commercial satellites (1 to 3 meters) based on the “generalization principle.”

However,such capability is useless for BMD operations.

Japan needs more advanced informationcollecting satellites with better resolution capabilities.

Japan’s current space policies do not allow

the possession of more advanced satellites that would have an important role in effective BMD
operations either, such as early warning satellites with advanced infra-red sensors that can detect
missile launches, or monitoring satellites to detect, track and identify ballistic missiles.

Internationally, the Japanese interpretation of the “peaceful use” of outer space is rather an
exception.

Although the principle of peaceful use of space has been adopted internationally,“peaceful use” has been interpreted to include use for defensive purposes that benefit the securityof the international community as long as there is no intention to invade.17

The aforementioned

information collecting satellites and early warning satellites are for a non-aggressive purpose
called BMD, so they could be allowed under the international community’s interpretation.

There

The government’s unified view presented in the statement of the Director-General of the Defense Agency,
Koichi Katoh, to the Budget Committee of the House of Representatives, February 6, 1985.
17 Nippon Keizai Dantai Rengoukai (Japan Economic Federation), “Future Development of Defense Forces:
Strengthening the Defense Production Capability and Technology Foundation,” July 20, 2004 [http://www.
keidanren.or.jp/japanese/policy/2004/063.html] (in Japanese) .
16

－80－

has been a growing argument that Japanese policy on the peaceful use of outer space should be
reviewed to allow effective response to threats facing Japan.

The move toward such revision is accelerating.

Government and private sector experts are now

studying ways to review the Resolution on the Peaceful Use of Outer Space while aiming toincorporate space-related items in the Mid-Term Defense Program for FY2011 and Beyond.18

The space industry is essential for Japan not only in terms of national security but also as core
infrastructure.

However, the situation facing this industry is quite severe and its international

competitiveness is declining.

In order to revitalize it, Japan needs especially to review its

principles for the peaceful use of outer space, and actively utilize space for various purposes,
including non-aggressive military operations.

It is a good indication for Japanese security that discussion of such matters has become more
serious following the North Korean missile launches in July 2006. Serious discussion of theseissues will benefit Japan’s national security posture.

4)

System for Confidentiality

One obstacle to expanded Japan-US defense cooperation is the underdeveloped system of Military
Information Exchange.

The Confidential Information Protection Law based on the Japan-US

Mutual Defense Assistance Agreement (MDAA) applies only to confidential information onequipment, not to operational information.

Japan and the US have not agreed even on a

“General Security of Military Information Agreement (GSOMIA).”GSOMIA provides that ① the recipient country will guard the confidentiality of information to
the same degree as the information provider country; ② any confidential information therecipient country receives from the provider country shall not be disclosed to any third countries
without the approval of the provider country; ③ the recipient country shall not use theinformation for any purposes other than the original purpose of the information provision, and ④
the recipient country shall respect any individual rights concerning patents, copyrights,
commercial secrets, etc., involved in the said information.19

Since there is no Japan-US GSOMIA, there have been restrictions on joint research of a broad

18

Sankei Shimbun, December 31, 2005.

Noboru Houshuyama, “Japan-US Military Intelligence Confidentiality Agreement (GSOMIA),” “RIPS’Eye”, Vol. 57 (January 2006) [http://www.rips.or.jp/Institute/rips_eye_no57.html] (in Japanese) .
19

－81－

range of technologies related to ballistic missile defense, and on the provision of operational
information from the US to Japan, which is needed for any joint response, including BMD.

This situation has encouraged Japan and the US to conclude a GSOMIA for a comprehensive
framework to protect confidentiality, and the two countries are reportedly negotiating such an
agreement.20

In order to agree on a GSOMIA, Japan needs to revise its defense information

protection structure so that it will conform to a stricter standard.

In the future, there may be aneed to review domestic laws that contain more prohibitive punishment of offenders, as well as an
expansion of the range of offenders.

For the expansion of offenders subject to punishment, thelaws should cover not only Defense Agency personnel now covered under the Self-Defense Force
Laws and private companies related to defense equipment acquisition, but also those stakeholders
with access to defense information, such as the officials of other ministries and agencies and evenmembers of the Diet.

20

Sankei Shimbun, January 30, 2006.

－82－

Chapter 6
1.

Enhancement of Japan-US Joint Operations Structure

Needs and Significance of Japan-US Joint Operations

The US is far advanced in the technological and systematic development of BMD, and in reality
Japan needs to rely on the US for many relevant technologies.

In addition, due to its restriction

on the use of the outer space for defense purposes, Japan has very limited collecting and analyzing
capability for such key information such as preparation for missile launching.

Moreover, theBMD system that Japan is now developing is limited in quality and quantity, even if its design
allows the SDF to single-handedly respond to ballistic missile attacks.

Especially when multiple

numbers of missiles target Japan simultaneously, Japan’s BMD system can provide only a limited
response capability.

Therefore, under the Japan-US security arrangement, it is appropriate todepend on the response capabilities of US Forces.

Japan’s efforts to build and operate a BMD

system cannot be realized without close coordination with the US.

As described earlier, the Chief Cabinet Secretary’s Statement in December 2003 said that the
BMD system “will be operated based on Japan's independent judgment,” and, at the same time,that “Japan will take all possible measures to ensure national defense…by promoting further
cooperation with the US on technology and operation.”

The statement on “Japan-US AllianceTransformation and Realignment for the Future” adopted at the Japan-US Security Consultative
Committee (SCC: “2+2”) in October, 2005 described BMD cooperation as follows:“Emphasizing that BMD plays a critical role in deterring and defending against ballistic
missile attacks, and can dissuade other parties from development and proliferation ofballistic missiles, both sides stressed the value of closely coordinating improvements intheir respective BMD capabilities.

To support these BMD systems, they emphasized thecritical importance of constant information gathering and sharing, as well as maintaining
high readiness and interoperability in light of the minimal time available to respond to aballistic missile threat.

The U.S. will deploy additional complementary capabilities in andaround Japan when appropriate, coordinating their operations to support Japan's missile
defense operations.

Close coordination between respective BMD command and control

systems will be critical to effective missile defense operations.”

This document also noted the establishment of a Bilateral Joint Operation Coordination Center(BJOCC) at the Yokota Air Force Base, to ensure coordination and interoperability between the
SDF and US Forces in Japan.

Moreover, collocation of the ASDF Air Defense Command

Headquarters with the Headquarters of the US Fifth Air Force at Yokota will strengthen
coordination for BMD operations, as well as exchange of intelligence information through the－83－

BJOCC.

In addition, the US has deployed an X-band early warning radar at the ASDF Shariki

Base in Aomori Prefecture, information will be shared to support Japanese BMD and damage
control operations, and the US is deploying PAC-3 and Aegis/SM-3 forces to support its
commitment under the Japan-US Security Treaty.

In January, 2006, then JDA Director-General Fukushiro Nukaga announced his thought to link
information networks including Japan-US radar information and C2BMC systems.

The systems

linked will include Japan’s FPS-XX, FPS-3 Mod, SPY-1 radar of Aegis ships, and C2BMC system,
and US early warning satellites, X-band radar (FBX-T), and SPY-1 radar on Aegis ships.1

At

present, Japan does not have early warning satellites with suitable infra-red sensors, and theanalysis capability of its information collecting satellites is considerably inferior to that of the US
reconnaissance satellites.

Thus for now Japan has no choice but to depend on the US for much of

its early warning information on missile launches as well as preparation activities.

The US, on

the other hand, needs to obtain sensor information collected by Japan, which is closer to North
Korea.

Therefore, Japan’s establishment of a system to provide such information would

demonstrate true bilateralism.

The US aims to build a multi-tier BMD deploying various elements of these systems as they
become available.

As the responses at each stage of interception need to be conducted

continuously, sensor information has critical importance in the sequence of these responses.

How

to integrate and coordinate various sensors positioned in space, air, ground and seas efficiently
and without gaps is the key for destroying incoming ballistic missiles.

Among these sensors, only those deployed on the ground can be used continuously.

The US

mobile X-band radar in combination with the ASDF FPS-XX radars improve significantly theidentification and classification of incoming ballistic missiles at the boost and mid-course phases,
thereby contributing greatly to successful interception.

Moreover, the radar also benefits todamage confinement by improving the precision in locating debris after missile destruction.

If above policies are implemented, Japan-US exchange of BMD information can advance to a muchhigher level and be conducted continuously.

It is necessary for both countries to have close

coordination in operations, such as agreement on coverage areas and the allocation of interceptor
forces, to effectively utilize the BMD resources of both countries.

1

Yomiuri Shimbun, January 14, 2006 (evening edition) (in Japanese) .

－84－

On the other hand, developing BMD system in Japan will allow the US to depend Japan on a partof information collecting.

Moreover, joint technology research, and the joint development projects

started in 2006 will provide technology and funding support to US BMD development efforts.
While there is considerable expectation on the contribution of US Aegis ships to Japan’s ballistic
missile defense, the key here is how to secure support capability in Japan for these ships.

Japan’s

capability to provide rear area support is also critical for the operation of US surveillance andcombat aircraft.

As seen here, Japan’s geopolitical conditions and its development of BMD capability will support
progress of the US MD program.

If Japan and the US can realize a closer relationship in joint

operations through exchange of information, Japan will provide an even greater contribution to
US MD capability in the future.

Japan’s defense cooperation for the US was called “burden sharing” during and immediately after
the Cold War.

Now, it has been transformed into “power sharing” partly through BMD

development.

Here, both Japan and the US will jointly respond to threats of ballistic missiles

against Japan as well as regional emergencies.

Japan’s BMD system can help protect US Forces

in Japan, and can contribute to the US response to ballistic missiles attacks on its territory, atleast in the area of information sharing.

If Japan-US joint operations for ballistic missile defense

are conducted properly, US presence in Japan will be strengthened, as will the credibility of US
extended deterrence.

Upon the realignment of US Forces stationed in Japan, there will be a need to reduce the burdenof local communities in Okinawa, while maintaining and even strengthening deterrence power.
The deployment of Japan’s BMD system and the progress in Japan-US joint operations willcontribute greatly to developments here as well.

2.

Japan-US Joint Operation Systems

According to the Guideline on Japan-US Defense Cooperation, Self-Defense Forces and US Forces
are, in principle, to conduct joint operations through the command and control system of eachcountry based on its sovereign right.

SDF operations under the current situation of

constitutional restraints are thus mainly defensive, and US Forces are to provide supportive andcomplimentary operations. Any offensive operation is mainly for US Forces.

Japan’s program for BMD is to build a system of early warning radars operated by the ASDF,
sea-based BMD on SM-3 armed MSDF Aegis ships, and ASDF air defense units that operate－85－

ground-based PAC-3 missiles, all under an integrated BMD unit commander from the ASDF Air
Defense Command.

The entire force will be controlled by the JADGE 2 (Japan Air Defense

Ground Environment) C2BMC system.

The first step for smooth joint BMD operations is to acquire early warning information.

Due tothe short response time characteristic of ballistic missile attacks to Japan, it is essential to gain
early warning information. As Japan has hardly any capability to do this, it needs to build asystem that can use information gathered by early warning satellites of the US DSP (Defense
Support Program).

As Japan’s BMD system needs to establish smooth joint operations with US BMD systems being
deployed in and around Japan, details of operation procedures must be defined.

As notedpreviously, JDA policy is to promote an integrated BMD information network between Japan andthe US that emphasizes the importance of early detection and tracking.

JDA also stresses theneed to closely link the ASDF automatic warning and control system that utilizes ground-based
radar as well as Aegis radar networks, with the information from early warning satellites andindependent radar network of the US, so to further develop monitoring capability.

Collocation of the ASDF Air Defense Command with the US Fifth Air Force Headquarters at
Yokota air base will promote information sharing and coordination, while the new Japan-US Joint
Operation Coordination Center (BJOCC) at Yokota will promote closer coordination of joint
operations. A Joint Operation Plan for BMD will be prepared by the newly-established Joint
Staff Office in cooperation with US Forces, and BJOCC will do the actual work of coordinating
operations between Japan and the US.

3.

Challenging Issues of Japan-US Joint Operations

1)

Framework of Japan-US Coordination and Project Managementa. Framework of Dialogue and Coordination
In December 2004, one year after Japan decided on the introduction of a BMD system, Japanrevised its National Defense Program Guideline, and introduced a new Mid-Term Defense
Program.

These programs stated intents to strengthen Japan-US security cooperation in the

improvement of ballistic missile defense capability, as well as further promotion of cooperation inpolicies, operations, equipment and technologies.

Based on this policy, Japan decided to conclude

a new Memorandum of Understanding (MOU) on BMD cooperation with the US.
JADGE is operated by the Air Self-Defense Force. It used to be called BADGE but was renamed when thesystem was updated with changes in system coverage.

2

－86－

This MOU, called the Framework MOU, is different from the MOU on Joint Technology Researchon the sea-based upper-tier system (NTWD: Navy Theater Wide Defense) started in 1999.

The

Framework MOU3 sets general terms for cooperation on the development of BMD capabilities andcovers various projects pertaining to information exchanges, joint research and development, andsystems analysis.
MOU.

Specific joint project activities will be implemented under Annexes to thisJapan and the US have established working groups for each project to coordinate concretemeasures for joint BMD projects.

The “Guidelines on Japan-US Defense Cooperation” approved in 1997 stated that the SDF and USForces are, in principle, to act under the command of each country to carry out preplanned
operations and closely cooperate in: ① cooperation under normal circumstances; ② actions in
response to an armed attack against Japan; and ③ cooperation in situations in areas surrounding
Japan that will have an important influence on Japan’s peace and security (situations in areas
surrounding Japan).

To effectively conducted joint activities under such guidance, both countries are to coordinate a“Joint Operations Plan,” which defines the actual cooperation between Japanese and US Forces in
response to emergences, and a “Mutual Cooperation Plan” for emergencies in the area surrounding
Japan.

In relation to this, the Governments of Japan and the US have agreed to review a new

defense cooperation framework to replace the current Guidelines.

Both governments is expected

to discuss such details as :① whether to revise the Guidelines to clarify the intent to promote joint
defense cooperation against new threats of terrorism and ballistic missiles, as well as activities
that contribute to the international community; or ② to develop a new framework by significantly
revising the Joint Operations and Mutual Cooperation Plans.

Meanwhile, BMD systems development will be pursued within the Framework MOU, while
operation plans will be developed through existing Japan-US coordination mechanisms.

As eachForce of US Forces will be responsible for the operation of mobile systems, Japan side needs tocoordinate with the US Pacific Command as well as US Forces in Japan.

Unlike US BMD, Japan’s BMD has overlapping operational areas between air and ballistic missile
defense, so that operational plans for BMD and air defense also overlap in large areas.
Considering this, it may be more appropriate to clarify the relationship between the Joint

3

Japan Defense Agency, Defense of Japan 2005 White Paper, p. 157 (in Japanese) .

－87－

Operation Plan and Mutual Cooperation Plan under the existing Japan-US coordination
mechanisms.

Furthermore, US Forces are likely to consider boost phase interception of ballistic missiles using
airborne weapons such as ABL (Airborne Laser) in BMD operations in the region surrounding
Japan, but such operation needs to be conducted closely with those of early warning and air
combat support.

It is very difficult to actually conducted BMD operations in a manner clearly

divided from air defense operations.

Therefore, it is necessary to have broad-ranged discussion

and coordination through a new framework for joint BMD operations, in addition to the existing
framework on the development of a joint operations system and preparation of joint operations
plans.

b. Project Management
It is important to not only have an addition to effective coordination on joint operations, but also
determine how to implement the outcome of such coordination; in other words, ① how to shareexpenses; ② how to implement projects and which side should be responsible for a given project;and ③ who to prepare and manage an overall schedule for the project.

Japan and the US need to review at the earliest opportunity the effects of the joint BMD projects
being undertaken prior to conclusion of the Framework MOU, as well as policy projects related totransformation of US Forces or their realignment in Japan.

Even if Japan and the US agree on cooperation in joint operations, this will be difficult toimplement unless JDA establishes a unified system to manage and promote projects to implement
such cooperation.

Therefore, it is preferable to establish unified project management systems

based on close association between Japan and the US.

While US projects are implemented through Defense Acquisition Regulations (DOD FAR 5000
series), Japan does not have sufficient rules and regulations to handle such projects and those thatexist differ considerably from those of the US.
management.

Among relevant rules and regulations in Japan, those concerning project

management are undeveloped.
management.

The most notable differences relate to projectJapan and the US also differ in the concepts behind project

Such differences may obstruct projects related to the development andmanagement of C2BMC, as these especially require closer coordination between Japan and the US.
Moreover, the US has adopted a spiral approach in the development of MD systems, so to advancethem phase by phase.

Japan also needs to adopt the similar approach through joint development－88－projects on ballistic missile defense.

In the US, it is normal to appropriate expenses for project management, but in case of Japan suchappropriation is quite rare.

In the US, project management is often handled through Integrated

Product Teams (IPT) of private and public sector personnel.

In Japan, however, it is difficult evento set up a team consisted of public and private sector personnel unrelated to particular contracts.
There is hardly such a thing as appropriating expenses for IPT activities.

Thus both countries

need to coordinate project management methods as well as integrate concepts of project
management.

This must be done by determining operational procedures for Japan-US

coordination as well as by management of specification for system formats and interfaces.

2)

Sharing of Information between Japan and the US

Sharing of information is a prerequisite for joint operations, but at the moment it is not clear what
information Japan and the US are to share.

Military information can be divided into “data or

pre-analysis information” and “analyzed intelligence.”
between Japan and the US is data.
intelligence.

The minimum level of required sharing

Each side would analyze shared data and formulate its own

Depending on the contents there could be some data that is difficult to share, sowhat sort of military information, especially specific data, needs to be shared should bedetermined carefully in a manner emphasizing effective BMD operations, and without obstructing
the national interests of either country.

We must not ignore the need to establish a common operational base on such matters as mapping
data; as such data form the foundation for information sharing.

This is because the US

Informational Net Centric Concept is founded on a common operational base within US Forces.

3)

Japan-US Joint Operations

a. Legislative Measures
For the smooth operation of BMD, Japan revised the Self-Defense Forces Law in 2006.

Since

BMD characteristically requires very short response times, the ballistic missile destruction
measures are added to that Law as Item 2 to Article 82, delegated authority to SDF commanders
on missile defense, as in the case of intercepting violations of territorial airspace.

This revision is a big step forward in Japan’s national defense.

Future issues will include

preparation of unit operational details, such as how to prepare Emergency Response Procedures－89－

under approval of the Prime Minister in association with the revised Self-Defense Forces Law,4
how to prepare the operational manuals, especially the Rules of Engagement (ROE) to determine
the level of delegated defense actions, whether to require approvals on such operational manuals,
and how to set procedures to approving changes to ROE to response to ever-changing war
conditions.

Preparation of such response procedures will also require review and adjustment ofJapan-US coordination procedures.

b. Coordination of Japan-US Joint Operations
Coordinated actions in joint operations will require not only static measures such as developmentof facilities, equipment, rules, and regulations, etc, but also building the dynamic aspects of BMD
through training under more realistic conditions and verification of system effectiveness.

For coordination of joint BMD operations the Japan-US Joint Operation Coordination Center(BJOCC) will need the following functions.

Firstly, as response to ballistic missile attacks is anational scale one regardless of how authority is delegated, there should be a communication
network over the C2BMC operated by BJOCC to connect all relevant systems.

Thatcommunication network aims to assist national decision-making by connecting C2BMC with thePrime Minister’s Office, as well as with the relevant systems of major Headquarters, national
security organizations such as police and firefighters, local communities, and other publicorganizations.

Secondly, for BMD operations BJOCC will provide joint command and control aswell as coordination functions, because operations will require not only coordination between
Japan and the US but also joint SDF operations.

Thirdly, BJOCC should aggregate relevant

BMD information including that obtained from satellites owned by Japan and the US, andimmediately convey any commands and information to interception units.

Lastly, BJOCC shallensure the integrity and required facility redundancy.

Implementing such functions requires the development of C2BMC that can provide effective
coordination between Japan and the US.

For this, it is necessary to determine a C2BMC system

as soon as possible and adjust the concept of its acquisition to the possibility of Japan-US joint
development.

4“Emergency Response Manual” is to be prepared by the Director General of the Defense Agency andapproved by the Prime Minister. This is to state procedures to prevent damage to human lives and assets
within Japanese territory in emergency situations such as ballistic missile attacks, where the situation
changes too rapidly to seek the approval from the Prime Minister. The Manual allows the Director-Generalof the Defense Agency to issue necessary commands to destroy ballistic missiles within a pre-designatedtime period to each unit. Any necessary items required for the preparation of the Emergency Response
Manual are defined under Government Ordinances.

－90－

It is also essential to determine how to proceed with coordination.

Japan and the US each needs

to prepare ROEs in advance and coordinate the timing of their application.
will not be easy.

Such coordination

There may be significant differences between Japan and the US in the scale ofauthority delegated to the unit commanders, so it is important to undertake coordination
domestically as well as with the US.

Items for coordination may include actual operational plans, operational airspace, applicable
ROEs and the timing of their exercise. As the level of coordination required for these items may
differ depending on the subject, it is necessary to distinguish coordination between national andtheater levels.

It will also be essential to develop a Common Operational Picture (COP).

major issue is which side should prepare and control this COP, Japan or the US.

－91－

The

Chapter 7

Development of C2BMC

1.

Items to Consider in the Development of C2BMC

1)

Japan’s Geopolitical Characteristics

The geopolitical characteristic facing Japan’s defense is that of a narrow width of land giving lessdepth for response to threats.

Missiles launched from neighboring countries can reach Japanese

territory in a very short time, giving only about 10 minutes response time against ballistic missile
attacks.

For proper response to such attacks it is essential to have: ① strengthened sea-borne

capabilities; ② fully prepared defense plans; ③ proper information collecting activities and warning
processes; ④ C2BMC that enables real-time information processing; and ⑤ establishment of various
operational manuals including Rules of Engagement (ROE) and the development of training andexercises.

Especially in terms of C2BMC development, the system must satisfy extremely advanced
performance requirements simultaneously, such as the minimization of human errors, extreme
care in view of political sensitivity, and decisiveness in military operation ― all under atime-pressured tense operating environment with a large-scale multi-layered command andcontrol structure involving decision-making from national to theater levels.

Japan’s geographical situation makes it dependent on sea lines of communication.

The BMDsystem Japan started to develop would mainly intercept ground-based ballistic missiles flying infrom the Eurasian continent, but Japan also may need capability against ship-launched ballistic
missiles from submarines (and even container ships operated by international terrorist groups), as
well as anti-ship ballistic missiles launched from land or sea.
of C2BMC accommodating such capabilities.

This will require the development

Japan may need to consider the possible emergenceof ballistic missiles armed with non-conventional warheads, including the High-Powered
Microwave Device (HPMD) said to be under development in China.

2)Technological Level

For effective operation of Japan’s BMD, it is essential to develop C2BMC thoroughly interoperablewith C2BMC of the US.

Since major technologies concerning C2BMC are held by the US; forexample, regarding real-time processing of information on incoming ballistic missiles,
discrimination of such missiles, and highly advanced kill assessment technology, the problem is
how to make it enable the transfer of such technologies to Japan and secure release of critical data.

It is not yet known whether the US Government will cooperate in the release of data and transfer－92－

of technologies needed for the development of Japan’s C2BMC.
require close bilateral consultation.

It may not be easy, and willAs the current situation of C2BMC development in Japan isthat Japanese companies are working with the support of US companies, these US companies may
demand the provision of technologies owned by Japanese companies in return.

How Japanese

government and domestic companies will respond to such demand involves fairly difficult
problems.

Nevertheless, the advancement of Japan’s BMD activities will undoubtedly lead tofurther strengthening of Japan-US relations.

Therefore, it is a difficult but critical challenge tobuild a framework of truly complementary relationships between the governments and industries
of Japan and the US, while further developing the foundation of Japan’s national defense to thelevel suitable for such a closer relationship.

3)

Subjects of Operations

To defend from ballistic missiles threats, Japan is building BMD weapons and sensors operated
under C2BMC.

However, current budget constraints have limited the variety and numbers ofsuch systems (Aegis ships, Patriot PAC-3 units, types of sensors, and quantities of missile
launchers as well as missiles themselves).

Such restriction may not present serious problems to

the scale of the C2BMC system or required performances of weapons, sensors and communication
networks, but future development of C2BMC could pose serious problems unless there is carefulconsideration of future weapon and sensor acquisition by Japan, how the US will deploy forces toJapan, and what weapons and sensors – in quantities and qualities – the US will position in Japan.
Therefore, it is important that the plan to build C2BMC capability is clearly defined phase byphase in response to expected growth in such weapons and sensors.

2.

Direction and Issues of C2BMC Development

1)

Basic Concept

The development of C2BMC should be based on the following concepts.
① BMD system aims to protect the lives and assets of Japanese people, and to defend Japan fromballistic missile attacks, so operational initiative should lie with Japan.
② As it is difficult in terms of both technology and funding for Japan to be self sufficient in BMD,
Japan needs to rely to some extent on the US.

On the other hand, the US is well on its way tosteadily developing BMD capability to cover its homeland as well as the entire Far East region.
Therefore, both Japan and the US need to clarify the mutual relationship of their BMD systems,
while confirming their concepts on how to cooperate in BMD operations.
③ Japan’s operational region for BMD is different from that of the US, while being almost
equivalent with Japan’s operational region for air defense.

So it is inefficient both technologicallyand financially to establish independent C2BMC systems as has the US.

－93－

Thus, as MOD(former

JDA) is doing now, it is better to add BMD its existing air defense system.
④ Japan is currently undertaking the development of C2BMC by adding BMD functions to theexisting JADGE system, yet, development efforts are likely to remain at a level of partial upgrades
comparing to the sufficient level to make C2BMC functions more effective joint operational
coordination.

In the future, C2BMC functions should be further strengthened, including linkage

to various systems owned by the Prime Minister’s Office, and each Self-Defense Force.

Moreover,to smoothly execute such measures as missile launch alarms, and confinement of impact damage,it is necessary to review linkages to systems such as those of other national organizations,municipal governments, and public organizations.
⑤ Since Japan’s BMD response time is extremely short, there must be joint Japan-US response
from national to theater-level, as well as information sharing at every level. In order to conduct
joint BMD operations without policy failures or delays in operation, Rules of Engagement (ROE) at
all levels should be determined in advance to define the delegation of authority required for eachsituation.
⑥ For BMD operations the Commander of the Joint Task Force (JTF) should use a single C2BMC
system to exercise integrated command and control activities.

To improve the efficiency of JTF

command and control activities it is important to secure sufficient peacetime staff organizationand support capabilities.
⑦ BMD communication networks should include coverage at each government level including
Ministry of Defense (MOD), Self-Defense Forces/Joint Task Force, and theater units.
⑧ In its development of C2BMC for MD, the US seems to distinguish command and control
functions from information functions.

In case of the Japan, there has been some effort to develop

an information collecting center, but it seems insufficient for development of C2BMC.

For themoment, therefore, Japan needs to improve information collecting functions by strengthening
links between US Forces information collecting community and various command, control andcommunication systems in Japan, including the Japanese C2BMC system.

2)

Concrete Measuresa. Improvement of Japan-US Interoperability
To improve interoperability between Japan and the US, standardization of equipment will beneeded as follows (in addition to the strengthening of confidentiality protection measures such as
the General Security of Military Information Agreement (GSOMIA) discussed in Chapter 5).

The US concluded the NATO Standardization Agreement (STANAG) on the standardization ofequipment, as well as standards for operational procedures, technological matters, andcommunication manuals on equipment used by the militaries of NATO members.

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The message

formats or protocols of LINK-11 or LINK-16 used by the SDF in Japan-US joint operation are
standardized under this STANAG.
stipulates such standards.

However, Japan is not a member of the agreement that

Therefore, if Japan is to operate such formats or protocols in its own

environment, it may become necessary to modify the message formats, depending on the situation.

Usually, if such a need arises, a Format Control Committee of member countries will decide
whether to accept a proposed change.
activity.

Since Japan is not a member, it cannot participate in such

So Japan needs to make a proposal to the US; if the US recognizes the need for a change,

then it submits a proposal to the Format Control Committee.

However, with the prospect ofmany changes needed for message formats throughout the processes of development, maintenance,and management of C2BMC, Japan must find a way to directly participate in the Format Control
Committee.

Upon the North Korean missile launches in July 2006, data communication within US Forces andbetween Japan and the US should have used the SAT-LINK16 or LINK-16.

SAT-LINK16 would

prioritize use by US Forces due to its limited capacity, and use by Japan could be restricted.
Should there be any lesson learned from the incident of July 2006, it would be the need to develop
a data communication system between Japan and the US free of any limitation in network
capacity or delays in relays.

Needless to say, the SDF should fully develop skills in data

communication with US Forces; otherwise there would be no smooth communication andinformation exchange.

To develop such skills, it will be necessary to implement more advanced

drills, exercises, and training for Japan-US integrated operations.

b. Composition of Multi-Layer Information Networks
As discussed in the previous chapter, there should be three layers of information networks on topof the C2BMC to allow smooth coordination of joint operations at the BJOCC: ① a national
network connecting the Prime Minister’s office, relevant ministries and agencies, and the central
command; ② a command network linking major headquarters of the Ground, Maritime, and Air
Self-Defense Forces, and; ③ a extended system connecting these networks with relevant systemsof police forces, fire-fighters and other national security organizations, local governments, andpublic organizations.

In developing such a system, it will be important to ensure a strong

resiliency that allows the networks to function even when damaged.

There will also be a need toeconomize network building to maximize the use of existing systems.

c. Promoting the Development of C2BMC
The project of adding BMD functions to the JADGE system is intended to link Aegis ships and－95－

PAC-3 with the JADGE at the center, but in near future it is planned to integrate new sensors
such as Japan’s FPS-XX radar into JADGE, and to link with information from US early warning
satellites and ground-based radar networks, further developing monitoring capability.

The

possibility of network building between Japan and the US using LINK16,1 STADIL-J (Satellite
Tactical Digital Information Link-J) 2 or JREAP (Joint Range Extension Application Protocol) 3 isunder review.

However, the development of such systems is limited to “Defense Capability” (active defense) interms of destroying incoming ballistic missiles, and not only provides no “Denial Power” (offensive
defense) to attack missile launching bases, but also offers extremely limited “Damage
Confinement” (passive defense) capability to respond to missile impact.

Therefore, in the future,

Japan needs to develop C2BMC that can support a broader concept of command and control inballistic missile defense, including such “Denial Power” and “Damage Confinement.”

For this purpose, it is necessary to implement the aforementioned: ① enhanced linkage withnational level command and control including the Prime Minister’s office system and the central
command systems of the Ministry of Defense; ② reinforcement of command and control systems
each Self-Defense Force uses for its operations; ③ linkage and integration with an extended
network connecting to police forces, fire-fighters and other national security organizations, local
governments, and public organizations; ④ linkage of information systems operated by the
Defense Intelligence Headquarters, the central MOD intelligence organization and; ⑤ the linkage
and integration of various information systems including US Force’s GCCS (Global Command andControl System), ground-based US radar (X-Band Radar), Aegis ships of the US Navy, and PAC-3s
deployed to Japan.

In developing such a system, it will be a challenge to incorporate the US

spiral approach to successively build capability with the Japanese method of planning and budget
allocation.

Utilizing lessons learned from the North Korean missile launches, coordinationneeded to establish requirements for joint operations and project management can be made easierthrough continued implementation of systems integration and network building between Japanand the US.

Tacticical Data Link System for mobile units. In the US and Europe, it is used for joint information
sharing, classification and identification, and navigation of Army, Navy and Airforce, as JTIDS (Joint Tactical
Information Distribution System) and MIDS (Multifunctional Information Distribution System).
2 A method to implement real-time communiation using satellites through the use of a LINK-16 message
format. By using satellites, it will not only extend the communication range, but also allow real-timecommunication by adjusting the delay in communication time.
3 A Protocol used for JRE (Joint Range Extension).
JRE is a method to link multiple number of tactical datalink networks using satellite communication, and extend the range of data exchange.
1

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3)

Required Functions for JapanThe following list shows the minimum functions Japan requires for C2BMC:①

BMD planning・ Assessing and distributing information from such sources as the Defense Intelligence
Headquarters.
・ Preparing and verifying BMD planning for each of MOD level, and Joint Task Force level.
・ Preparing, coordinating and maintaining the most appropriate joint deployment plan of US
and Japanese forces for BMD in the region surrounding Japan.
・ Simulating a series of BMD activities needed to prepare and verify combat plans, as well as
maintain and update information used for BMD.
・ Enabling flexible modification to overall BMD configuration in response to changes in combat
areas.
②

Command & Control (C2)・ Immediately conveying commands and instructions from the Defense Minister to the Joint
Task Force commander, and ensuring the dissemination of such information to relevant units
・ Enabling the Joint Task Force commander to immediately convey orders to constituent units,
while communicating with other relevant units (command and control of battle management
method can be either centralized or decentralized).

In addition, communicating with thePrime Minister’s office and relevant ministries and agencies on the combat situation.
・ Immediately providing information collected and analyzed at the Defense Intelligence
Headquarters to Joint Task Forces.
③

Warning・ Reporting timely to senior commanders, and communicating with relevant units uponreceiving missile launch warnings from relevant organizations as well as US Forces
・ Quickly recognizing indications of ballistic missile launches, so to raise alert conditions4・ Controlling unified sensors
・ Distinguishing actual targets from decoys of incoming missiles, detecting and tracking themissiles, and identifying the locations of debris from intercepts.
・ Predicting impact locations as accurately as possible to ensure preparation before impact andconfine damage afterward; communicating such information to relevant organizations andunits.
・ Preparing COP (Common Operational Picture) and present it to relevant units④

Interception of incoming ballistic missiles

・ Quickly ordering an engagement plan and applicable ROE, based on orders from superior
Separate systems are to operate the interception of missiles by joint task force, divided into several stages
depending on the urgency of ballistic missile attacks on Japan.

4

－97－

commander(s) upon engagement and analysis of threats・ Allocating the most appropriate weapons and ordering their firing, based upon threat analysis,
the status of usable weapons, the number of remaining weapons, and priorities for theprotection of facilities
・ Monitoring the engagement situation, overriding the previous commands by cancelingengagements, or ordering the self-destruction of launched weapons; confirming the results ofengagements, and reporting them to superior commanders and other relevant units⑤

Disabling enemy missiles by methods other than interception

・ Implementing soft-kill operations at the missile launch sites, using un-manned aerial vehicles(UAV) and aircraft
・ Disabling an enemy’s command and control systems by electronic countermeasures or cyberattacks⑥

Communication related to BMD

・ Controlling unified communication networks related to BMD
・ Developing and maintaining communication manuals related to BMD・ Effectively integrating various missile defense functions with US Forces⑦

Maintaining and improving system capabilities

・ Simulating a series of system functions
・ Monitoring missile interception tests and analyzing the results⑧

Support of training and exercises related to BMD・ Supporting training using simulation, as it is difficult to use actual targets in BMD training⑨

Ensuring systems reliability

・ Protecting from, and conducting countermeasures against cyber attacks, the biggest threat tosystems and networks
・ Ensuring the credibility of information and data obtained from systems and networks

3.

Future Tasks

1)

Coordination of Japan-US Joint Operations at Yokota Air Base

Currently, the development of C2BMC in Japan is focused on adding BMD functions to the JADGE
that operates mainly at the Air Operation Control Center (AOCC) at Fuchu Base.

Therefore,

when the project is completed, the Commander of ASDF Air Defense Command, designated as theCommander of the Joint BMD Task Force, will execute command and control of BMD, along with
air defense operations at Fuchu.

However, when BJOCC is established at Yokota Base, air defense operations should be transferred
there.

It is not clear when this transfer will occur, but this factor should be fully incorporated into－98－the development of C2BMC.

It is also necessary to review procedures for establishing the Air

Defense Command Headquarters next to the command post of the US Forces, and consider themost appropriate way to exchange information, thereby ensuring full coordination andharmonization with changing US C2 systems.

Depending on the situation, a phase by phaseapproach, such as firstly working on systems related to BMD and then systems related to otherdefense operations, may facilitate smoother development of systems.

2)

Relationship between Information Functions and C2BMC

As a part of developing a joint operations structure, MOD is to reorganize the Defense Intelligence
Headquarters as organization directly reporting to the Defense Ministry.

To do so, it is necessary

to consider how to provide early warning information and US Forces’ information on BMD, which
are likely to require extremely urgent response, to the Joint BMD Task Commander. Also, there
is an urgent need to review the methods, tools, and procedures of information exchange between
the Defense Intelligence Headquarters and Joint BMD Task Force.

3)

Project Management System at the MOD

The development of a BMD system and C2BMC will implemented phase by phase.

Thus it isnecessary to designate a position at the Joint Staff Office or Internal Bureau of the MOD with sole
responsibility for the operation of such systems, as in the case of the Program Executive Officer(PEO) in the US, so to implement an integrated management of projects through securing budgets,
understanding project status, and exercising necessary control.

This position should be

supported by an organization to manage projects, coordinate efforts with US counterparts, andcontrol procurement from private contractors.
be delegated to the Joint Staff Office.

Authority to request and manage budgets should

For the moment, it is possible to designate a specificSelf-Defense Force (Chief of Staff Office) as in the case of the US, establish an organization for
project management, implement this project for future integration, and establish a system so that
all Self-Defense Forces can support such an organization.

On the other hand, US Forces are currently promoting information exchange with multi-national
forces, by starting an Advanced Concept of Technology Demonstration (ACTD) project for eachstage of Command and Control (C2) and Intelligence, Surveillance, and Reconnaissance (ISR), anddesignating an Integrated Product Team (IPT) of private and public sector participants todetermine requirements and capabilities.

This is a method highly popular in the US for someyears as a way of quickly providing capabilities sought by operators.

The status of the ACTD on

C2BMC is unclear, but ACTDs have already been adopted for conventional arms andcounter-terrorist measures.

－99－

When developing C2BMC in Japan, it is necessary to have close coordination with the US in
determining requirements for information exchange.
such coordination may take a long time.

Due to different languages and cultures,Moreover, there are problems of differences intechnologies and of releasability of information.

To reduce risks associated with such problems

and obtain agreement in a short period it is time to consider establishing IPTs drawn from theprivate and public sectors.

4)

Establishment of Infrastructure for Communication Networks

It is no exaggeration to describe the establishment of a quick and certain communication networkas the very core of C2BMC for BMD operations characterized by their critical nature and need for
immediate response. As described already, the BMD in Japan requires the establishment of acommunication network that conforms to each response level, and consists of multi-layered
networks connecting national government agencies, relevant SDF headquarters and combat units,
and US counterparts.

Such communication networks obviously require superior characteristics

not only in terms of performance but also in confidentiality and resilience.

Information networks

between Japan and the US, especially those connecting US Navy Aegis ships, US Army-operated
X-band radar and PAC-3 units, and Air and Maritime Self-Defense Force units, require
agreements, procedures, and manuals related to information exchange, as well as joint trainings
and exercises that utilize lessons learned from the North Korean missile launches of July 2006.
In addition, we must consider the effective utilization of the US Forces’ communication
infrastructure as the need for joint operations increases.

5)

Establishment of a System to Assess Capability

Japan’s BMD systems are gradually developing, but Japan does not have an appropriate system toguarantee their quality, assess the capability of an overall system, identify items that need to beacquired, and use such information to develop new projects for such acquisitions.

Especially inthe case of Japan, restrictions on areas allowed for test launches make it extremely difficult to
conduct tests using ballistic missiles to assess BMD systems capabilities.
choice but to rely on simulators to assess BMD systems.

Therefore, there is no

At present, Japan’s capability tosimulate hostile ballistic missiles, present simulation information to C2BMC, and assess C2BMC’s
response is extremely limited.

The ASDF is developing simulation functions as a tool of JADGE assessment.

This function is

expected to develop into a laboratory for BMD research and development, equivalent of JNIC of－100－

the US.5

In the transition, we should consider developing a capability to classify and store dataand parameters obtained from missile launch tests.

It will be important to review the development of modeling and simulation (M&S) function forballistic missiles, and obtain a capability to monitor launch tests in order to collect data on SM-3
and PAC-3 operations.

JNIC (Joint National Integration Center): A research facility under the US Missile Defense Agency locatd
at the Shriver Air Base in Colorado. The Center develops, and assesses systems and equipment related tomissile defense using the cutting edge of technologies, and develops doctorine for joint missile defense,
support for preparing operational plans, and simulations on various operations.

5

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Part 3Comprehensive Measures for Responding to Missile Attacks

Chapter 8

Japan’s Participation in Arms Control, Disarmament and

Non-Proliferation
1.

Purposes and Significance of Arms Control, Disarmament and Non-Proliferation

BMD is not the only method to reduce the threat of ballistic missiles.
well as non-military measures.

There are other military as

Typical non-military methods include arms control, disarmament,

and non-proliferation, which are defined as follows:1
・ Arms control involves the control of armaments and military equipment by setting upperand lower limits, verifying and inspecting compliance with such restrictions, developing
mutual trust, and restricting the transfer of conventional weapons.
・ Disarmament aims for the reduction or overall elimination of armaments and militaryequipment.
・ Non-proliferation is prevention and control of the proliferation of armaments in general,
especially weapons of mass destruction (WMD) such as nuclear, biological, and chemical
weapons, delivery means such as missiles, and related materials and technologies.

Each country has the sovereign right to possess armaments needed for its security.

However, if

country A reinforces its military capabilities, and country B doubts A’s intentions, then country B
may start to reinforce its own military capabilities.

If country B’s reinforcement encourages

country A to doubt the intentions of country B, then country A may have motive to further develop
its armed forces. As seen here, the military build-up of one country may result in a security
dilemma where the strengthening of one country’s security may invite anxiety in other countries,
resulting in other countries reinforcing their security to mitigate such anxiety.

In the end, efforts

to strengthen security may result in the instability of bilateral relationships.2

For countries in asecurity dilemma, not only is the possibility for armed conflicts even greater than before thestrengthening of armed forces, but also there is concern that the scale of confrontation and damage
may become larger.

Moreover, the costs to develop such armed forces are likely much higher thanoriginally anticipated.

Arms control, disarmament, and non-proliferation are approaches whereby countries agree

Disarmament, Non-Proliferation and Science Department, Ministry of Foreign Affairs (ed.), Japan’s
Disarmament and Non-Proliferation Policy (3rd edition), Ministry of Foreign Affairs of Japan, 2006, p. 6 (inJapanese) .
2 Jitsuo Tsuchiyama, International Politics of Security: Impatience and Conceit (Tokyo: Yuuhikaku, 2004), p.
109 (in Japanese) .
1

－103－

unilaterally, bilaterally, or multilaterally to implement qualitative or quantitative limitations on
the possession of armed forces or to adopt measures to restrict the actual operation of armed forces.
The implementation of such measures is expected to prevent security dilemmas to maintainstability in the security environment, and to mutually strengthen the security of each country
without relying just on armed forces.

This would also provide the benefit of capping military

expenditures that accompany arms build-ups.

In addition, arms control, disarmament, andnon-proliferation negotiations may work as channels of communication between hostile countries,
as exemplified in the nuclear arms control negotiations conducted between the US and the Soviet
Union during the Cold War.

On the other hand, countries have tried to exploit frameworks for arms control, disarmament, andnon-proliferation to create a more favorable situation for their own side.

To agree on arms control,

disarmament, and non-proliferation, each party had to undergo hard negotiations concerning eachword of the agreement texts because there were conflicts of national interests.

Those agreements

on arms control, disarmament, and non-proliferation were sometimes made only when there wasno longer any confrontation between the parties, or because changes in the security environment
and/or technological innovation eliminated or diminished the need to regulate arms.

This is what

is called the “paradox of arms control and disarmament.”

Certainly, one cannot deny that the frameworks for arms control, disarmament, andnon-proliferation have had important roles in securing stability.

Yet, one must also rememberthat such frameworks are also used as strategic tools by many countries.

2.

Arms Control, Disarmament, and Non-Proliferation Policies

Arms control, disarmament, and non-proliferation developed rapidly after World War II when
nuclear weapons emerged and major powers started to build nuclear arsenals.

Ever since then,the issue of ballistic missile defense has had a strong influence over trends in arms control,
disarmament, and non-proliferation.

1)

The Cold War Period: Arms Control and Missile Defense between the US and USSR

a. Establishment of ABM Treaty and Nuclear Arms Control
After the end of World War II, the US and the Soviet Union entered into the Cold War, the historyof which was strongly influenced by the nuclear weapons possessed by both countries.

The USand the Soviet Union were in fierce competition over the build-up of strategic nuclear forces,
including Inter-continental Ballistic Missiles (ICBM), Submarine Launched Ballistic Missiles(SLBM), and heavy bombers, as these allowed direct attacks on the other’s homeland.

－104－

They alsoengaged in an arms race in non-strategic nuclear weapons as well.

At first, the US had supremacy in nuclear forces, but the Soviet Union rapidly narrowed this gap
from the launch of Sputnik in 1957 and the build-up of nuclear forces that followed.

In addition,

the Soviet Union actively promoted the development of Anti-Ballistic Missile (ABM) systems tointercept US strategic nuclear weapons.
of strategic weapons after 1964.

In response, the US proposed a freeze on the expansion

The Soviet Union rejected this proposal for fear of locking in its

inferiority against the US in strategic nuclear forces.

The Soviet Union, however, changed its policy and accepted the US proposal to negotiate overarms control in 1968.

Underlying this policy change was the fact that the US and the Soviet

Union had almost reached parity in their strategic nuclear forces, in addition to the fact that the
US announced a decision to deploy the Sentinel ABM system in 1967.

This was the moment thatthe nuclear arms race between the two countries actually let them recognize the need for arms
control, and they started the first round of Strategic Arms Limitation Talks (SALT) in 1969.

During the SALT I negotiations, the US proposed prioritizing limitations on ABM development,
arguing the need to maintain a situation of Mutual Assured Destruction (MAD).

Although

opposed to such arguments at first, the Soviet Union eventually agreed to prioritize ABM limits.
In the US, the Safeguard ABM system was firstly intended to defend the US from Soviet ICBM
attacks, but later the US emphasized its significance as a major item in the SALT negotiations.3

Both countries signed the ABM Treaty in March 1972, and the Treaty entered into force in Octoberof that year.

It set strict limits on ABM activities.

The deployment of ABM systems wasprohibited except at two sites in each country: the capital city and ICBM launch silos (bothcountries agreed to reduce the number of sites where ABM systems could be deployed from two to
one under the ABM Treaty Protocol agreed in July 1974). At each ABM base, the number of ABM
launchers and missiles could not exceed 100.

The ABM Treaty also limited the qualitativebuild-up of systems by prohibiting the development, test, or deployment of ABM systems or theircomponents on sea, air, space, or mobile ground platforms.

To ensure the implementation of the

ABM Treaty, it was determined that either country could freely conduct inspection and verification
using “national technical means,” and that neither party could interfere with such inspections.

Tetsuya Umemoto, “Development of National Missile Defense,” Satoshi Morimoto (ed.), Missile Defense:
The New Structure of International Security (Tokyo: Japan Institute of International Affairs, 2002), p. 37 (in3Japanese).

－105－

The ABM Treaty can be considered to have institutionalized the MAD situation in terms of letting
the US and the Soviet Union accept their vulnerability to strategic nuclear missile attacks fromeach other. At the time of the ABM Treaty, the mainstream concept in the US was that MAD
would benefit the strategic stability between the US and the Soviet Union as each side saw eachother as a mirror image.

Therefore, the ABM Treaty was called the cornerstone of strategic

stability.

Moreover, the ABM Treaty was seen as a foundation of arms control between the US and theSoviet Union on strategic nuclear weapons, as it would lessen the motivation for either country toincrease its strategic nuclear weapons to overwhelm the other’s defensive weapons.

The US andthe Soviet Union also signed the SALT I Interim Agreement at the same time as the ABM Treaty.
Here, both countries agreed to freeze the total number of ICBM launchers, SLBM launchers, andnew types of submarines with ballistic missile capability (SSBN).

Also, the additional

manufacturing of ICBM launchers was frozen, and caps were set on the deployment of SLBM
launchers and SSBNs.

While the SALT I Interim Agreement was valid for only 5 years, it was

historic in that the US and the Soviet Union agreed to limit the nuclear arms race for the firsttime.

In November 1979, both countries signed the SALT II Treaty.

The SALT II Treaty set the total

number of ICBM launchers, SLBM launchers and Air-to-Surface Ballistic Missiles (ASBM) at 2250,
to be achieved by the end of 1981.

It also included a limit on the introduction of Multiple

Independently Targeted Reentry Vehicles (MIRV) for ballistic missiles.

However, there wascriticism in the US over a perceived “window of vulnerability,”4 in which implementing the SALTII Treaty would weaken the US vis-à-vis the Soviet Union in terms of strategic nuclear capabilities.
The Soviet invasion of Afghanistan in December 1979 led the US to recognize the fact that nuclear
parity would not deter Soviet expansion.

The Carter Administration could not get Congress to

ratify the treaty, while the Reagan Administration opposed its ratification.

In the end, the SALTII Treaty expired at the end of 1985 without entering into force.

The “window of vulnerability” reflected the criticism that the SALT II Treaty restrained the US from adding
prompt hard-target kill capability to its ICBM forces that could effectively strike, while allowing Soviet
supremacy on the number of nuclear warheads and load weights on ICBMs, as well as prompt hard-target
kill capability.
Soviet SS-18 ICBMs deployed by the end of 1970s were MIRVs with 8 to 10 nuclear
warheads on each missile. They had higher precision and prompt hard-target kill capability. It wasthought that preemptive attacks using these missiles could destroy US ICBMs with hard-target killcapability. If the US then used SLBMs and heavy bombers to retaliate, then the Soviet Union was expected
to counterattack high value targets in the US. So in fear of that, the US could not retaliate. In other words,
US deterrence capability against the Soviet Union would collapse. See, for example, George H. Quester,“Relating Nuclear Weapons to American Power,” Stephen J. Cimbala (ed.), Deterrence and Nuclear
Proliferation in the Twenty-First Century (Westport, Connecticut: Praeger, 2001), pp. 15-16.
4

－106－

2)

SDI and the ABM Treaty

The Strategic Defense Initiative (SDI) launched by the Reagan Administration led to intense
debate not only between the US and the Soviet Union but also within the US.
its relationship to the ABM Treaty.

One problem wasSpace-based interception was central to the SDI but the ABM

Treaty prohibited any ABM development and deployment other than fixed ground-based systems.
In regard to this, the US government adopted in October 1985 an interpretation that the ABM
Treaty would not prohibit the development and testing of ABM systems based on other physicalprinciples that had not been assumed at the time the ABM Treaty was signed, such as laser
weapons.

This new and broader interpretation was strongly criticized not only by the Soviet Union but also
by SDI opposition groups within the US.

The Reagan Administration supported such a “broader

interpretation,” but the Congress attempted to block it by adding conditions to SDI funding that noABM systems based at sea, in the air, in space, or on mobile ground launchers could be developed,
tested or deployed, regardless of the physical principles adopted.

While the administration ofGeorge H. W. Bush maintained the “broader interpretation,” the Clinton Administration dropped
it in light of the considerable decline in the former Soviet threat.

3)

The Implications of SDI for Nuclear Arms Control Negotiation

In his speech of November 1981, President Reagan proposed the Strategic Arms Reduction Talks(START) between the US and the Soviet Union, arguing a need to radically reduce the number ofstrategic nuclear weapons in an equal and verifiable way rather than to limit their number, which
had resulted in a unilateral nuclear forces expansion by the Soviet Union.

President Reagan

added that the US would be ready to withdraw from its plan to deploy Pershing II IRBMs andGround-Launched Cruise Missiles (GLCM) to Europe, if the Soviet Union would remove its
Intermediate-Range Ballistic Missiles (IRBM) such as SS-20, SS-4, and SS-5 deployed in theSoviet homeland and adjoining European region.5

The US and the Soviet Union began negotiations on START and Intermediate Nuclear Force (INF)
agreements, but progress was largely dependent on SDI.

Gravely concerned by US promotion of

SDI, the Soviet Union argued for linkage between SDI and nuclear arms control; limitation on SDI
development would be the condition for promoting nuclear arms control.
linkage and did not change its approach to SDI.

The US rejected thisMoreover, the US decided to increase its

5 Ronald Reagan, “Remarks to Members of the National Press Club on Arms Reduction and Nuclear
Weapons,” Washington D.C., November 18, 1981 [http://www.reagan.utexas.edu/resource/speeches/1981/
111881a.htm].

－107－strategic nuclear forces and started to deploy GLCM in Europe, based on a decision by the North
Atlantic Treaty Organization (NATO) 6 in 1979.

Faced with this situation, General Secretary Mikhail Gorbachev steered the Soviet Union towardpursuing nuclear arms control negotiations.

His move was undoubtedly influenced by strong

concern over SDI. No one can deny the fact that SDI delayed progress on nuclear arms control
negotiations due to the Soviet Union’s argument for linkage.
brought the Soviet Union to the negotiating table.

However, it is also true that SDI

If SDI became a reality, then it would be easy

to predict that the Soviet Union would be forced to increase its strategic nuclear forces to maintainthe balance with the US.

Expansion of the US INF and strategic nuclear forces would also force

the Soviet Union to bear a greater burden.

Since its economic situation was already in serious

deterioration, the Soviet Union did not have sufficient capability to engage in an arms race with
the US.

The Soviet Union had a strong motivation to avoid defeat in the nuclear arms race with

the US by establishing a nuclear arms control treaty.

That is why General Secretary Gorbachev proposed in February 1987 to proceed with INF
negotiations which, aside from SDI, had become an immediate concern for Soviet security.

The

US and the Soviet Union agreed to a “Double Zero,” eliminating their mid-range (1000-5500 km)
and short-range (500-1000 km) missiles from Europe, and later to a “Global Double Zero” toeliminate all of their mid- and short-range missiles worldwide.

The INF Treaty was signed in December 1987 and entered into force in June 1988.

It stipulated

that both countries were to eliminate ground-based mid-and short-range missile systems(including missiles, launchers, related structures and support equipment) under strict verification
measures, including on-site inspections.

Both countries complied with the Treaty and even today

do not possess such missiles.

Concerning the reduction of strategic nuclear weapons, both countries were able to agree on many
issues, including measures to be incorporated in a treaty.

However, continued Soviet insistenceon linkage with SDI prevented conclusion of a treaty during the Reagan Administration.

The

Soviet Union finally abandoned the idea of linkage with SDI in September 1989, after theinauguration of the George H. W. Bush Administration.
(START I) was signed in July 1991.

The Strategic Arms Reduction Treaty I

The START I Treaty stipulates reduction of the total numberThis decision concerned the deployment to Western Europe of US IRBM (Pershing II, 108 missiles) andGLCM (464 missiles) capable of reaching the Soviet homeland, in exchange of promoting US-Soviet
negotiation of theater nuclear forces in Europe.

6

－108－

of strategic nuclear delivery vehicles, such as ICBMs, SLBMs, and heavy bombers deployed byboth countries to less than 1600 within seven years after the Treaty’s entry into force, with thenumber of heavy ICBMs to be reduced to less than 154, and strategic nuclear warheads to lessthan 6000.

Dismantlement of delivery vehicles was to be conducted under strict verification.

The START I Treaty was truly epoch-making as the first treaty that stipulates the reduction ofstrategic nuclear weapons possessed by the US and the Soviet Union. At the same time, theTreaty was valued as beneficial to the strengthening of strategic stability between the twocountries through its significant reduction of heavy ICBMs with MIRVs, seen as having great
potential for preemptive attacks.

After the signing of START I, and reflecting growing concern over Soviet control of its nuclear
weapons, President Bush announced in September 1991 unilateral measures to remove tacticaland theater nuclear weapons (hereinafter referred to as non-strategic nuclear weapons) except
those on bombers and attack aircraft, and requested the Soviet Union to take similar measures.
President Gorbachev followed the US move by announcing similar disarmament measures in
October 1991.

After the dissolution of the Soviet Union in December 1991, the Bush

Administration announced in January 1992 the end of further production of B-2 bombers, the haltof smaller ICBM development and new ICBM production, the discontinuation of nuclear warhead
production for SLBMs, and the ending of a program for new types of cruise missiles.

Soon after

this announcement, Russian President Boris Yeltsin requested that the Russian Parliament ratify
the START I Treaty, and promised to implement reduction measures before its entry into force, as
well as a series of unilateral nuclear disarmament measures related to strategic nuclear weapons.
The strategic nuclear weapons of the former Soviet Union were deployed in Belarus, Kazakhstan,and Ukraine in addition to Russia.

These countries and the US signed the START I Treaty

Protocol (Lisbon Protocol) on May 23, 1992, and agreed to have all these countries as parties to the
START I Treaty; Belarus, Kazakhstan and Ukraine would also join the NPT as non-nuclear
weapons states.

The Treaty and its Protocol entered into force in December 1994.

The threeformer Soviet countries other than Russia removed all nuclear weapons from their territories andtransferred them to Russia.

2.

Changing Situation after the Cold War

1)

Response toward the Issue of WMD proliferation

After the Cold War, there was growing concern that the proliferation of WMD and missiles toThird World countries could threaten the peace and stability of the international community.
There had been efforts to prevent proliferation of nuclear weapons since the time of the Cold War
under the nuclear non-proliferation regime, whose core is the Nuclear Non-Proliferation Treaty－109－

(NPT) that entered into force in March 1970.

However, the revelation of clandestine nuclear

programs undertaken by Iraq and North Korea immediately following the end of the Cold War led
the international community to further strengthen the nuclear non-proliferation regime, resulting
in a series of measures such as reinforcement of the guidelines for the Nuclear Suppliers Group(NSG) in 1992, indefinite extension of the NPT in May 1995, establishment of the Comprehensive
Nuclear-Test-Ban Treaty (CTBT) in September 1996, and establishment of the Additional Protocol
to the International Atomic Energy Agency (IAEA) Safeguards Agreement in May 1997.

The international community also sought to enhance non-proliferation measures for WMD otherthan nuclear weapons.

The Chemical Weapons Convention (CWC), established in January 1993,

prohibits the development, manufacture, acquisition, transfer, and use of chemical weapons understrict verifying measures, and stipulates the dismantlement of existing chemical weapons as wellas production facilities.

The Biological Weapons Convention (BWC), which entered into force inMarch 1975, does not have verification measures.

Negotiations for establishing a verification

protocol failed in the summer of 2001 due to opposition by the US, but discussions on how tostrengthen the BWC were conducted.

The Australia Group is an international export control

regime on biological and chemical weapons.

For missiles that can serve as delivery vehicles for WMD, export control has been implemented
through the Missile Technology Control Regime (MTCR) launched in April 1987. At first, the
MTCR aimed to control the export of delivery vehicles for nuclear weapons but, since July 1992, it
has covered the export of missiles that can carry WMD, including biological and chemical weapons,
as well as related dual-use items and technologies. As of the end of 2005, 34 countries wereparticipating in the MTCR. Among Category I items, the most strictly controlled, are systems
carrying WMD with capabilities exceeding a 300km/500kg range/payload threshold, andsub-systems such as rocket stages, re-entry vehicles, rocket engines, guidance systems andwarhead mechanisms.

Whether Third World countries (including rogue states) can develop or acquire missiles largely
depends on whether they can get support from foreign suppliers.
some effect in controlling the proliferation of missiles.
proliferation by the MTCR alone.

In this sense, the MTCR has

However, it is difficult to fully prevent

Equipment, materials, and technologies related to missiles

have already proliferated, and non-MTCR countries such as North Korea and China continue toexport them. Moreover, the guidelines and lists agreed to under international export control
regimes, including the MTCR, are not legally binding, and have no penalties for violation.

－110－

The WMD non-proliferation regime has certainly been strengthened since the end of the Cold War.
However, relying solely on diplomatic measures may not be sufficient.7

The reasons that countries seek WMD and missiles are to enhance their deterrent and/or
war-fighting capability, achieve goals such as regional hegemony, or respond to domestic politicalsituations.

It is necessary to remove such motivations by having them relinquish WMD, but thisis extremely difficult to do so.

If rogue states are strongly determined to acquire WMD or missiles,

they may not join a treaty that prohibits such action, or may violate it.

Although Iraq and North

Korea were parties to the NPT, both countries secretly carried out nuclear weapons development
programs.

Once these countries have WMD and missiles, it would be difficult to force them to abandon such
weapons.

In the case of Iraq, UN Security Council Resolution 687 (3 April 1991), adopted

immediately after the Gulf War, stipulated that Iraq abandon its WMD as well as certain missiles.
Such resolutions against other rogue states are not likely to be adopted in peacetime.

Further,

Iraqi interference with inspections by the United Nations Special Commission (UNSCOM)
prevented successful implementation of the resolution.

Of course, the importance of diplomatic measures should not be undervalued.

The establishmentof non-proliferation regimes made possible the acceptance of non-proliferation of WMD andmissiles as the global norm.

Today, most countries in the world comply with the treaties and thearrangements related to non-proliferation.

Still, as noted above, relying just on diplomatic

measures are not sufficient to address proliferation issues.
further proliferation will occur.
regional conflicts.

Proliferation is already a fact, andWeapons and missiles already proliferated may be used inThat is why it is necessary to have missile defense to deter the use of missiles,and defend against those used.

2)

START and the Agreement on the Demarcation Agreements of the ABM Treaty

Before the START I Treaty entered into force in January 1993, the US and Russia signed theStrategic Arms Reduction Treaty II (START II).

This Treaty stipulated the reduction of strategic

nuclear warheads to a range of 3000-3500 km by January 1, 2003, and totally eliminated MIRVed
ICBMs.

The latter point in particular was highly valued as promoting strategic stability between

the US and Russia.

See Kathleen Bailey, “Missile Defense and Nonproliferation,” Comparative Strategy, Vol. 12, No. 1 (1993),
pp. 15-22.
7

－111－

Although the US ratified the START II in January 1996, Russian ratification was delayed becauseof its concern that if MIRVed ICBMs, Russia’s major strategic nuclear force, were totallyeliminated, Russia might have difficulty maintaining even the START II Treaty level of strategic
nuclear forces.

Given a deteriorating economic situation, sooner or later Russia might not be able

to keep even a quantitative balance in strategic nuclear forces.

In addition, Russia wasconcerned that it would become extremely vulnerable to any preemptive attack from the US, if the
US became capable of intercepting Russian strategic nuclear weapons through its missile defense
systems.

To mitigate Russian concerns, the US and Russia agreed on the Joint Statements on the ABM
Treaty, parameters for future reductions of nuclear forces and the security of Europe, at theHelsinki Summit between Presidents Clinton and Yeltsin in March 1997.

Based on these

agreements, the US and Russia agreed on several arrangements regarding the ABM Treaty and
START II Treaty in September 1997.

The Memorandum of Understanding on the ABM Treaty stipulates that the US, Belarus,
Kazakhstan, Russia, and Ukraine are state parties to the Treaty.
three other documents related to the ABM Treaty.

These five countries also signed

The “First Agreed Statement” regulated TMD

systems with interceptors not exceeding 3 km per second, and the “Second Agreed Statement”
regulated higher velocity TMD systems.

In either case, it was made clear that the restrictions

under the ABM Treaty would not be applicable to such TMD, unless the system could intercept
ballistic missiles with velocities of 5 km per second and ranges exceeding 3500 km.

The Second

Agreed Statement further stipulated that member countries would not develop, test, and deploy
space-based interception systems or components.

The “Agreement on Confidence-Building

Measures Related Systems to Counter Ballistic Missiles Other Than Strategic Ballistic Missiles”
focused on information exchange concerning the US Theater High Altitude Area Defense (THAAD)
and Navy Theater Wide Defense (NTWD), and the SA-12s in Russia, Belarus and Ukraine.

The US and Russia also signed the Protocol on the START II Treaty, which included agreement on
extending the date for dismantling strategic nuclear delivery vehicles under START II from theoriginal January 1, 2003 to December 31, 2007.

At the aforementioned summit in Helsinki, theUS and Russia also agreed to reduce the number of strategic nuclear warheads to less than
2000-2500 by December 31, 2007 as part of a basic framework for a Strategic Arms Reduction
Treaty III (START III).

It was expected that these agreements would persuade Russia to ratify START II.

－112－

However,Russia was offended when the US began promotion, even if limited, of National Missile Defense(NMD) in 1998, and the ratification process again stopped.

The US proposed a Protocol on the

ABM Treaty in 2000, which included a provision to allow the deployment of 100 interceptor
missiles to defend a limited area of the US and Russia against attacks using certain long range
ballistic missiles.

Russia, however, also opposed this proposal.

President Vladimir Putin, who succeeded Yeltsin, placed highest priority on the ratification of the
START II Treaty and, in April 2000, Russia ratified the START II Treaty, its Protocol, and the
ABM Treaty-related documents.

However, Russia’s domestic laws relating to the ratification of

START II stipulates US ratification of the START II Protocol and documents relating to the ABM
Treaty as a condition for exchanging ratification instruments for the START II Treaty.
US had not ratified these documents, they did not come into force.

Since theThe reason the US could not

ratify them was that the conservatives in the Republican Party maintained that the US should
further promote NMD, and strongly criticized the ABM Treaty-related documents of the Clinton
Administration.

The George W. Bush Administration inaugurated in 2001 clearly stated a policy not to have
START II entry into force. As the US withdrew from the ABM Treaty in December 2002, Russia,
in turn, indicated that it would not be bound by START II.

These moves leave no prospects that

START II will take effect and START III established.

3.

Post 9/11: Active Promotion of MD

1)

US Withdrawal from the ABM Treaty

In his May 2001 speech at the National Defense University, President Bush stated that the US
and Russia should replace the ABM Treaty, based on distrust and the remnants of hostility fromthe Cold War, with a new framework reflecting a clear and complete departure from the past.
Soon afterward, Deputy Defense Secretary Paul D. Wolfowitz stated that progress on missile
defense development would inevitably infringe upon the ABM Treaty and, moreover, that such asituation might arise not in several years but within several months.8

For the Bush Administration, early withdrawal from the ABM Treaty was an unavoidable step inpromoting a flexible MD program.

The Bush Administration aimed to build a multi-layered

defense network that would include sea-, air-, and space-based capabilities in addition to fixed
ground-based systems.

However, the development of such systems for intercepting long-range

Paul D. Wolfowitz, Deputy Secretary of Defense, “Prepared Testimony,” prepared testimony on ballistic
missile defense policies and programs in review of the Defense Authorization Request for Fiscal Year 2002,
United States Senate Committee on Armed Services, July 12, 2001.

8

－113－

ballistic missiles was prohibited under the ABM Treaty.

Moreover, there was concern that eventhe construction of a test bed in Alaska might infringe upon the ABM Treaty, which prohibited the
preparation of an ABM base for defense of national territory.

In consideration of these possibilities, the Bush Administration officially notified Russia of its
withdrawal from the ABM Treaty on December 13, 2001; the withdrawal became effective six
months later.

In announcing this action, the Bush Administration noted the proliferation of

WMD and ballistic missiles among state and non-state entities prepared to use such weapons
against the US.9

The US withdrawal was unilateral without agreement from Russia, and there was concern that
Russia and China might start massive build-ups of nuclear capabilities.
have not materialized.

However, such concerns

President Putin’s criticism was rather restrained.

He stated that “thepresent level of bilateral relations between the Russian Federation and the US should not only bepreserved but should be used for working out a new framework of strategic relations as soon as
possible,” and proposed the reduction of strategic nuclear weapons “to the level of 1,500-2,200
nuclear warheads for each side.”102)Treaty on the Strategic Offensive Reductions (Moscow Treaty)

After the US notification of its withdrawal from the ABM Treaty, the US and Russia began tonegotiate the reduction of their strategic nuclear weapons.

The negotiations concluded in about

six months and, in May 2002, Presidents Bush and Putin signed the Strategic Offensive
Reductions Treaty (Moscow Treaty), which entered into force in June 2003.

The Moscow Treaty stipulated that both countries reduce the number of deployed strategic nuclear
warheads to 1700-2200 by the end of 2012.

Consisting of only five articles, the Moscow Treaty

was created under the basic understanding that the US and Russia are no longer enemies and,unlike earlier nuclear arms control agreements, it does not describe methods for reducing arms,
the composition of strategic nuclear forces after the reduction, the dismantlement of reduced
strategic offensive weapons, or verification mechanisms.

One factor that led both the US and Russia agree on the Moscow Treaty was that each party could
incorporate its interests with regard to strategic nuclear weapons.

From the US view, the“Text of Diplomatic Notes Sent to Russia, Belarus, Kazakhstan and Ukraine,” December 13, 2001
[http://www.state.gov/r/pa/prs/ps/2001/index.cfm?docid=6859].
10 “Televised statement by Russian President Vladimir Putin,” December13, 2001, reprinted in ACRONYM
Institute’s website [http://www.acronym.org.uk/docs/0112/doc01.htm].
9

－114－

Moscow Treaty would secure flexibility in strategic nuclear forces.

For Russia, the Moscow

Treaty maintained a quantitative balance with the US in strategic nuclear forces, while removing
the obligations to reduce MIRVed ICBMs.

Moreover, agreeing to the Moscow Treaty served

Russia’s desire to maintain equivalence in superpower status with the US.

In addition, the Moscow Treaty emphasized the cooperative relationship between the US andRussia developed since the 9/11 terrorist attacks.

Through such a relationship, both countries

could further their cooperation, and expect support from each other over a broad range ofproblems.

3)

New Movement toward the Prevention of Proliferation

While arms control between the US and Russia made great strides forward, the situation
surrounding the proliferation of WMD and missiles was being exacerbated by the presence of a
nuclear black market, the revelation of clandestine nuclear programs, the proliferation of WMD
and missiles among states of proliferation concern such as North Korea, cooperative relationships
among such states, and even the possibility of international terrorist groups and non-state actors
acquiring and using such weapons.

With the proliferation issue being aggravated, the attention of the international community is
focused on the Proliferation Security Initiative (PSI), which aims to locate aircraft and ships withdoubtful cargo and seize them, if possible, to prevent transfer to states of proliferation concern or
terrorists.

PSI was first proposed by President Bush in June 2003, and then embodied in the“Statement of Interdiction Principles” in September 2003.
countries, including Japan.

PSI is centered on a core group of 15

Already 70 countries have agreed to the Declaration.

PSI member

countries have endeavored to prevent illegal transfers at various locations throughout the world.
Japan hosted the maritime prevention exercise called “Team Samurai '04” in October 2004.

Most of the actual performance and records of PSI activities are classified but they are expected tobring some results.

For example, a ship carrying equipment for centrifuges to Libya wasinspected off the coast of Italy in November 2003, and the related cargo was seized.

This incident

actually led to Libya’s decision to abandon its nuclear weapons development program.

Moreover,it revealed the existence of a nuclear black market, so this is considered an important achievementof the PSI.

As the PSI is implemented within the laws of each country as well as under existing internationallaw, there are certain restrictions on high seas activities to inspect and seize cargo on third country－115－

flag ships.

Therefore, the US has been trying to expand effective PSI areas by signing shipboarding agreements with those countries offering flags of convenience, such as Panama andLiberia.

In addition, the Protocol to the Convention for the Suppression of Unlawful Acts against

the Safety of Maritime Navigation (SUA Convention) was adopted in October 2005 to enable theinspection of ships illegally transferring cargo related to WMD.

Measures are also developing to prevent terrorist attacks using WMD.

UN Security Council

Resolution 1540 stated that member countries should prevent WMD proliferation by enacting andimplementing domestic legislation.

In addition, the International Convention for the

Suppression of Acts of Nuclear Terrorism was signed in September 2005.

In regards to proliferation of ballistic missiles, there was no international agreement except theexport controls under the MTCR.

However, the Hague Code of Conduct against Ballistic Missile

Proliferation (HCOC) was concluded in November 2002, establishing the international norm
against proliferation of ballistic missiles.

As of October 2005, 123 countries, including Japan,

have signed the HCOC. Although the HCOC is not legally binding, members have expressed
their political will to observe it.

The subscribing states to the HCOC resolve to exercise

maximum possible restraint in the development, testing and deployment of ballistic missiles
capable of delivering WMD; not to use peaceful Space Launch Vehicles (SLV) programs as a coverfor ballistic missile development; not to support the development of ballistic missiles in countries
that could possess WMD; and to implement confidence-building measures such as advance noticeof the launching of ballistic missiles or SLVs.

The establishment of the HCOC is a great achievement toward the non-proliferation of ballistic
missiles.

However, because it is not legally binding, and countries actively continuing ballistic

missile-related activities such as North Korea are not participating, its universality andeffectiveness is not sufficient.

Given the aggravated state of WMD proliferation, ballistic missile

defense will remain important for the foreseeable future.

3.

Roles of Japan’s Ballistic Missile Defense (BMD)

1)

Trends among Northeast Asian Countries

Unlike Europe, where treaties such as the Treaty on Conventional Armed Forces in Europe (CFE)
have been implemented, Northeast Asia has no specific measures for arms control, disarmament,
or non-proliferation, although individual countries have joined international agreements.

Among various nuclear arms control agreements made between the US and Russia, the INF－116－

Treaty and the unilateral nuclear disarmament measures of September and October 1991 aredirectly applicable to the security of Northeast Asia.

Under the INF Treaty, the possibility of the

US and the Soviet Union deploying INFs in their own territories or in allied countries, including
those in Northeast Asia, was eliminated.

In addition, the unilateral nuclear disarmament

measures adopted by the US and the Soviet Union clearly led to the removal of all sea-based
non-strategic

nuclearweapons, including

Ship-Launched

CruiseMissiles (SLCM)

ground-based non-strategic nuclear weapons deployed in allied countries.

andThe US also removed

all nuclear demolition munitions placed in South Korea during the Cold War.

China is the only country among the five nuclear-weapon states that has not reduced its nuclear
weapons, but rather increased their number.

China’s principles on arms control are: to maintainits status as a major power in the international community while strengthening its image as a true
advocate of peace and arms control; to avoid substantial reduction in its military forces while
trying to suppress the capabilities of other major powers; and to protect its own interests fully
when participating in any arms control measure.11

Moreover, China asserts that disarmament should not be a tool for superpowers to control lesser
powers, nor a handful of countries to seek one-sided superiority in security. 12

In terms ofnumbers of nuclear weapons possessed, China is far behind the US and Russia, so China is not
likely to accept arms control on nuclear weapons that fixes its disadvantage.

Concerning non-proliferation, all Northeast Asian countries except North Korea are parties to the
NPT, BWC and CWC.

North Korea had joined the NPT and BWC, but it declared its intent towithdraw from the NPT in January 2003, so its legal status is currently under discussion.
Korea is also said to possess biological weapons in violation of the BWC.

North

North Korea is not a

party to the CWC, and is said to have a massive amount of chemical weapons.

Japan, South Korea and the US are all members of international export control regimes and have

11 See Alastair I. Johnston, “China Enters the Arms Control Arena,” Arms Control Today, Vol. 17, No. 6(July/August 1987), p. 17; Robert G. Sutter, “Chinese Nuclear Weapons and Arms Control Policies:
Implications and Options for the United States,” CRS Report for Congress, 94-422S (March 25, 1994)[http://www.fas.org/spp/starwars/crs/94-422s.htm]; Banning N. Garrett and Bonnie S. Glaser, “Chinese
Perspectives on Nuclear Arms Control,” International Security, Vol. 20, No. 3 (Winter 1995/96), pp. 43-78;
Robert A. Manning, Ronald Montaperto and Brad Roberts, China, Nuclear Weapons, and Arms Control: A
Preliminary Assessment, Chairmen’s Report of a roundtable jointly sponsored by the Council on Foreign
Relations, the National Defense University and the Institute for Defense Analysis, 2000, pp. 64-72.
12 “China’s General Position on Arms Control and Disarmament,” Ministry of Foreign Affairs of the People’s
Republic of China [http://www.fmprc.gov.cn/eng/4485.html].

－117－

developed domestic export control systems, including “catch-all” systems. 13
member of the Australia Group.

Russia is not a

China joined the NSG (Nuclear Suppliers Group) in June 2004,

but has not participated in other export control regimes.

As mentioned in Chapter 2 of this book,both China and Russia are considered suppliers of WMD, missiles, and missile-related materials
and technologies, although China argues that it has made efforts to strengthen export controls
over such materials.14

On missiles, China has argued that it implements export controls in conformity with the MTCR
guidelines although not a member of the MTCR yet.

In August 2002, China passed a domestic

law to control exports of missiles and related items and technologies.15

However, because China

lacks the practical capability to implement a catch-all system, and because the People's Liberation
Army’s involvement in export control may hamper detailed inspection of exported materials,
equipment and technologies from PLA-related companies, China is not considered to be
implementing effective export control.16

Neither China nor North Korea participates in the HCOC.

Although the HCOC is not legallybinding, the failure of China and North Korea to commit to a framework for preventing theproliferation of missiles is not favorable for the security of Northeast Asia, as both countries
continue to build up their missile forces.

Moreover, this fact undermines the effectiveness of

non-proliferation efforts.

In regard to North Korea, especially its nuclear weapons program, negotiations continue throughthe Six-Party Talks.

In September 2005, the Six Parties adopted their first joint statement, with

North Korea being committed to give up its existing nuclear program as well as all nuclear
weapons, and to rejoin the NPT.

However, discussions remain stalemated with little prospect ofresolution.

Upon North Korea’s launching of ballistic missiles in July 2006, Japan and the US sought the
adoption of a UN Security Council resolution stipulating economic sanctions, while China andRussia argued that a statement by the President of the UN Security Council would be preferable

However, there were several cases recently, where Japanese companies illegally export arms relatedmaterials. It needs to further strengthen implementation of export controls.
14 See Ministry of Foreign Affairs, People’s Republic of China, “China’s Efforts in Arms Control, Disarmament
and the Prevention of Proliferation,” September 2005 [http://www.china-embassy. or.jp/jpn/ gfzc/t213080.htm].
15 See Ministry of Foreign Affairs, People’s Republic of China, “Chinese policies and measures for theprevention of proliferation,” December 2003 [http://www.pekinshuho.com/2003.50/200350-wenxian1.htm].
16 Stephanie C. Lieggi, “Overview of China’s Export Control System,” Asian Export Control Observer, Center
for Nonproliferation Studies, Monterey Institute of International Studies, Issue 2 (June 2004), pp. 15-16.
13

－118－

and stated that they would veto any resolution that included sanctions.

South Korea also

opposed the adoption of sanctions.

Ultimately UN Security Council Resolution 1695 stipulated that North Korea’s launching ofballistic missiles capable of carrying WMD warheads violated its commitment to continue a
moratorium on missile launches.

The resolution demanded North Korea cease missile-related

activities, reconfirm its moratorium on missile launches, and commit to an immediate andunconditional return to the Six-Party Talks.

It also “requires all Member States, in accordancewith their national legal authorities and legislation and consistent with international law, to
exercise vigilance and prevent the procurement of missiles or missile related-items, materials,
goods and technology from the DPRK, and the transfer of any financial resources in relation to
DPRK’s missile or WMD programmes.”

However, North Korea rejected the resolution only 45 minutes after its adoption, and suggested
the possibility of further missile launches.

In its return to the Six-Party Talks, North Korea has

not withdrawn its condition that the US remove financial sanctions against North Korea.

On the other hand, members of the Six-Party Talks other than North Korea have agreed on
utilizing the Six-Party Talks as a forum to discuss various issues concerning the security of the
Korean Peninsula, including nuclear and missile issues.

Japan is expected to take a more activerole at the Talks, using them as a platform to implement what this book calls “Dissuasion
Diplomacy.”2)

Needs and Implications of Ballistic Missile Defense (BMD)

Japan considers the promotion of arms control, disarmament, and non-proliferation as one of themain pillars of its diplomacy.

Not only has Japan joined major treaties related to arms control,

disarmament, and non-proliferation, and complied with their obligations, it has also actively
contributed to further strengthening arms control, disarmament, and non-proliferation
measures.17

It will be most preferable for missile threats to be reduced through such diplomatic efforts. Yet theworld has already seen the extensive proliferation of missiles capable of WMD delivery.
hardly any prospect of missile-armed countries eliminating them.

There isOn the contrary, missile

17 For Japan’s diplomacy in arms control, disarmament, and non-proliferation diplomacy, see Disarmament,
Non-Proliferation and Science Department, Ministry of Foreign Affairs (ed.), Japan’s Disarmament and
Non-Proliferation Policy.

－119－

capabilities are being strengthened. As noted before, there are no treaties or agreements toprohibit the possession or proliferation of missiles, and export control measures can only provide
limited effects.

Japan actually faces the threat of ballistic missiles with WMD warheads, including nuclear
weapons.

That is why Japan is putting much effort into diplomacy to reduce such threats and, atthe same time, increasingly needs ballistic missile defense to deter and defend against their use.

Japan’s BMD efforts and Japan-US cooperation in this area may have significant implications forthe promotion of arms control, disarmament and non-proliferation. For example, if the BMD
system is sufficiently effective, then adversaries will have fewer incentives to possess or increasesuch capabilities, which in turn will promote non-proliferation.

Moreover, the enhancement of

US deterrence by denial capabilities through missile defense will increase potential US military
actions to enforce compliance of non-proliferation obligations, thus complementing thenon-proliferation regime.

At present, neither the non-proliferation regime nor the United Nations can be expected to makeappropriate responses ― especially coercive ― to violations of non-proliferation obligations.
Rather, coercive (especially military) measures are usually undertaken by major powers that leadthe international order.18

Development of both BMD and non-proliferation measures could lead to a reduction in the role andsize of US nuclear forces, which has been required to deter the use of WMD and/or ballistic
missiles.

Such reduction would restrain the US build-up of nuclear forces, could make further

reductions possible, and enable the US to take further arms control initiatives.

3)

Desirable Policies for Japana)

Effective Use of Ballistic Missile Defense (BMD)

Japan should consider the utilization of BMD to increase the effectiveness of its efforts on arms
control, disarmament and non-proliferation.

Japan has abandoned the possession of nuclear weapons, strongly argued against the proliferationof nuclear weapons, and advocated their ultimate elimination.

Japan’s claim has won strong

support from the international community, as proven by the fact that the nuclear disarmament
See Masatsugu Naya, “Political Studies of ‘Military Sanction,’” Kokusai Mondai, No. 242 (May 1980), pp.
39-40 (in Japanese).
18

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resolution Japan has proposed every year to the General Assembly of the United Nations has been
adopted by overwhelming majorities.

However, Japan’s efforts have not led to substantial outcomes on nuclear arms control anddisarmament, a continuing dilemma for Japan and the world.

Progress on nuclear arms control

and disarmament is, of course, influenced strongly by the security situation at the time.

However,the fact that Japan has never possessed weapon systems that might impact the security ofcountries with nuclear weapons may lessen its persuasive power.

If Japan is to continue calling on the world to eliminate nuclear weapons, then it needs to have aneffective card to strengthen its involvement in such an argument.

Ballistic missile defense can bejust that key “strategic” system.

We must not forget that the history of nuclear arms control and disarmament is strongly linked
with that of the build-up of nuclear weapons and/or missile defense forces.

Even if one country

wants to promote arms control and disarmament, it will not succeed unless other countries
participate in such efforts.

To encourage such participation, these countries need to be assured

that acceding to restraints on their own military forces will actually strengthen their own security.
Meanwhile, the build-up of nuclear weapons and/or missile defense forces could provide a way toincrease a sense of security in other parties.

In the relationship between Japan and China, for example, even if Japan presses China to reduce
weapons that directly threaten Japan, China will not likely concede unless it can obtain somethingof value in return. Although the BMD system Japan is to introduce is defensive in nature, it canbe developed into a capability that could strongly influence China’s nuclear strategy.

In thisrespect, it could become a card to bring China to the negotiating table on arms control anddisarmament.

If Japan and China start a “strategic” security dialogue beyond what they have done in the past by
including issues such as nuclear weapons, ballistic missiles, BMD, and arms control anddisarmament, both countries could reduce tensions through exchanges of information to increasetransparency in their approaches to strategic weapons and arms control.
confidence-building measures.

They could also develop

Such talks would undoubtedly benefit both Japan and China by

reducing the possibility of a security dilemma.

If such confidence-building measures could be developed into arms control and disarmament－121－agreements, both countries could enhance their security.

For this, however, both countries needto find a balance between Japan’s ballistic missile defense forces and China’s nuclear/ballistic
missile forces, including the most appropriate levels for Chinese missile and Japanese missile
defense capabilities.

Generally, if there is strong asymmetry in armaments, it is extremely difficult to attain progress
on arms control and disarmament.

Therefore, for building arms control and disarmament

measures in Northeast Asia, it may be necessary to have measures that cover the nuclear and
BMD capabilities of the US in addition to those of Japan and China.

Needless to say, if Japan utilizes BMD as a card, Japan itself may be restricted on the types,
qualities and numbers of BMD systems.

As Japan is to use BMD for deterrence and defense,

there is no need to be bound by the use of BMD as a tool if security interests can be obtained byother methods.

Yet there is no guarantee that other parties will continue to observe arms

control/disarmament agreements, and a new threat could arise.

Therefore, even if Japan accepts

arms control on BMD, Japan inevitably needs to maintain a certain level of BMD capability as
well as a relevant industrial/technology base.

b)

Roles of Arms Control, Disarmament, and Non-Proliferation

Promotion of regional and international arms control, disarmament, and non-proliferation alongwith the introduction of BMD systems will be extremely beneficial to national and regional
security.

Japan would certainly benefit its interests by continuing to take the initiative in such

efforts.

Such efforts by Japan would be significant, first of all, for mitigating the security

dilemma, and any arms race that could arise from introduction of BMD.

Ordinarily, a security

dilemma can be weakened if the balance between offensive and defensive power shifts to theadvantage of defensive power.19

In this respect, it is not the characteristics of such weapons, but the intent of a country that is
important.

In other words, the introduction of a defensive weapon system like BMD could resultin increased spending on an offensive posture.

If country A fears that country B, which is tointroduce BMD, may intend to attack it, then country A will likely reinforce its defense capabilities.
If country B sees country A building up its military forces, country B may further build up its own
forces.

19

Charles L. Glaser, “The Security Dilemma Revisited,” World Politics, Vol. 50, No. 1 (October 1997), p. 185.

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Japan’s introduction of BMD might be taken as an increase in military forces by other countries,
so such efforts may not necessarily have favorable effects on arms control, disarmament andnon-proliferation.

As the intent of other countries here is merely an estimate, it is possible that

other countries may assume the worst scenario.

Still, Japan may be able to use the introduction of BMD to start the talks on arms control anddisarmament.

If such talks can lead to better understanding on intents and capabilities, it will

enhance transparency on future plans for strategic weapons and deterrence systems, which can inturn enhance mutual trust and encourage progress on arms control initiatives.

Japan’scommitment to arms control, disarmament, and non-proliferation efforts can discredit the view
introduction of BMD is a stepping stone to more offensive military forces, including nuclear
weapons.

Promotion of arms control, disarmament, and non-proliferation efforts, especially in relation toballistic missiles, may enable Japan to pursue BMD capabilities in a practical way.

Japan may

not be able to acquire all desired BMD capabilities because of budgetary and technologicallimitations.

Moreover, ballistic missiles are not the only threats to which Japan must respond.

Under such situation, if a ballistic missile threat can be limited through arms control,
disarmament, and non-proliferation measures, Japan can reduce its BMD budget.

To repeat, the introduction of a BMD system does not necessarily work favorably for arms control,
disarmament, and non-proliferation.

There is always a possibility that such action may bringmilitary build-ups, or further proliferation of ballistic missiles and other weapons.

In this sense,

the introduction of a BMD system is “a double-edged sword.”

When attempting to improve the current situation through arms control, disarmament, andnon-proliferation initiatives, those countries not satisfied with current situation may not agree tosuch measures.

It is certainly not easy to control weapons, when the weapons concerned areasymmetrical and differ in types.

Even if negotiation on the arms control of ballistic missiles takes place, there would be no idealarms control measure to balance ballistic missiles and BMD systems.

What will be the number of

BMD systems that can be considered equivalent to one ballistic missile?

How to calculate thecapabilities of ballistic missiles and ballistic missile defense?

These are the questions that are essential in considering arms control, disarmament, and－123－

non-proliferation measures for both offensive and defensive weapons.
to such questions.

There are no easy answers

If the ballistic missiles of one country are not only directed at a country thathas BMD capability, the value of possessing such ballistic missiles will not likely diminish so much,even when faced by the ballistic missiles defense of one country.

While there are such difficulties, it is necessary more than ever to promote arms control,
disarmament, and non-proliferation along with the introduction of BMD systems, to reduce thethreats of ballistic missiles, mitigate destabilizing implications of BMD, and enhance BMD
effectiveness.

Such efforts can have significant effect in the future.

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Chapter 9
1.

Establishing Deterrence Posture

Ballistic Missiles Defense (BMD) and Deterrence Posture“Deterrence” can be defined as a way to dissuade another country from taking aggressive actions
by demonstrating, in advance, a capability and willingness to inflict serious damage in retaliation.
If it becomes possible to dissuade a country possessing ballistic missiles from using such weapons,in other words “deterring” such use, that will prevent direct or indirect damage from ballistic
missile attacks or intimidation through the possibility of such attacks.

Achieving deterrence

involves three elements: capability to deliver serious damage, willingness to use such capability,
and recognition of such capability and willingness by other countries.

Ways of deterrence can bedivided into “deterrence by punishment,” which is to deter attacks through intimidation bymassive retaliatory attacks; and “deterrence by denial,” which emphasizes capability to limit
damage and prevent achieving the objectives of an attack, thereby causing the other country torealize the uselessness of such actions.1
Typical deterrence by punishment is massive attack using nuclear weapons retaliatory.

Nuclearweapons certainly represent the capability to deliver devastating damage, which another country
can easily recognize.

However, it is not easy to enhance the credibility of such deterrence bypunishment by demonstrating a willingness to use nuclear weapons, or having others “realize”
such willingness, since there are concerns over counter-counter-attacks, as well as moral
restraints against the use of nuclear weapons.

Undoubtedly, another country cannot be sure that

there is absolutely no possibility of using nuclear weapons.

It is also difficult to predict when andin what case another country will use nuclear weapons as retaliation. As the capabilities ofnuclear weapons are obvious, another country will inevitably take a cautious approach to thedetermination of their use.
Not only nuclear weapons but also conventional weapons can provide deterrence by punishment.
The US, especially, possesses conventional weapons with destructive power equivalent to low-yield
nuclear weapons.

Precision guidance weapons can also be used as retaliation through pin-point

attacks against enemy’s high-value targets or their leadership.

Since conventional weapons havea much lower threshold to their actual use than nuclear weapons, it is easier for an enemy torealize a willingness to use them, making the credibility of conventional weapons for deterrence bypunishment higher.

Still, the value of deterrence by punishment will lose value unless an enemy

realizes that conventional weapons can inflict colossal damage.
Ballistic missile defense, on the other hand, can be classified as a typical means of deterrence by

See Glenn H. Snyder, Deterrence and Defense: Toward a Theory of National Security (Princeton: Princeton
University Press, 1961), pp. 14-16.
1

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denial. A country that possesses a BMD system undoubtedly has strong willingness to use suchcapability to limit damage from ballistic missile attacks.

An enemy can easily realize such

willingness.

So the credibility of deterrence by denial can be higher than that of deterrence bypunishment.

Moreover, even if deterrence did not work, denial capability through BMD can beused to limit damage by intercepting ballistic missiles.
Of course, if an enemy perceives a lower interception capability of BMD, then it will see a lower
possibility of its ballistic missiles attacks being deterred.

In addition, BMD does not provide

unacceptable damage to an enemy, unlike more offensive nuclear weapons. Since deterrence bydenial provides less deterrence power than deterrence by punishment, it has been suggested that
deterrence by denial has slight value if defense capability is not sufficiently strong.2

Whether

BMD can function as deterrence largely depends on an assured capability to intercept ballistic
missiles sufficient to prevent an enemy from achieving its objectives, and thus causing an enemy
to recognize such capability.
From such viewpoint, it becomes necessary to add denial capabilities against ballistic missile
attacks by adopting offensive defense measures such as pre-emptive attacks on ballistic missile
bases, and passive defense measures that confine damage from ballistic missile hits, in addition toactive defense through BMD.

While each measure for active defense, offensive defense or passive

defense is no perfect by itself, combining these measures can optimize capability to respondagainst ballistic missile attacks, thereby improving deterrence by denial.3
2.

US Missile Defense and Deterrence Strategy

1)

Cold War Era: MAD between the US and the Soviet Union

While making efforts to build up strategic nuclear weapons in the late 1960s, the US and theSoviet Union reached the situation of so called “Mutual Assured Destruction” (MAD), in which
both countries possessed “assured destruction capability” sufficient to retaliation even after
receiving first strike.4
In the US, the dominant concept of that time was that having the US and the Soviet Union in a2

See Glen H. Snyder, “Deterrence by Denial and Punishment,” Davis B. Bobrow (ed.), Components of

Defense Policy (Chicago: Rand McNally & Company, 1965), pp. 209-237.

However, a deterrence relationship built by combining both punishment and denial capabilities will makestrategic calculation more complex. Under such a situation, while each side will act more cautiously, it would
likely miscalculate the “capability” and “willingness” of the other side. Such miscalculation does notnecessarily have adverse effects. If each side overestimates the capability and willingness of the other party,
deterrence becomes more effective to both sides. Of course, there is an opposite case, where each side
underestimates the other’s capability and willingness, which frequently leads to the failure of deterrence.
To maintain a stable deterrence relationship, both sides need to recognize capability and willingness moreaccurately through an appropriate level of communication.
4 See Robert S. McNamara, “Hearing on Military Posture before the U.S. Congress,” Authorization for
Military Procurement, Research, and Development, 1969, hearing before the Committee on Armed Services,
U.S. Senate, S3293, reprinted in Haley, et al, Nuclear Strategy, Arms Control, and the Future, pp. 81-91.
3

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MAD situation would be preferable to maintaining strategic stability where the possibility ofstrategic war would be reduced.5

By possessing invulnerable assured destruction capability, bothcountries would have fewer motives to conduct first strike (crisis stability).

In addition, since itwould be meaningless to possess strategic nuclear forces greater than those needed to maintain anassured destruction capability, the inducements for arms races would also be reduced (arm racestability).6
To maintain MAD required that both the US and the Soviet Union have retaliatory forces withhigh survival rates, and that both would not seek damage limitation measures that might
threaten each other’s retaliatory capability.

One such damage confinement measure was ballistic

missile interceptors (Anti-Ballistic Missiles: ABM), so the deployment of ABMs was seen to
threaten MAD, and hence the strategic stability.

Thus the ABM Treaty in 1972 was seen to

institutionalize the MAD situation.
The US declaratory policy was assured destruction strategy, which emphasized deterrence bypunishment that depended on counter-value attacks.

However, in the employment policy that set

targets for nuclear forces, the US stressed the need for counter-force attacks on military targets bystrategic nuclear weapons.7

In March, 1983, President Reagan questioned the morality of MAD

in that it deterred wars by holding civilians hostage and announced a plan to remove the threat ofstrategic nuclear missiles by building a defense system “rendering these nuclear weapons
impotent and obsolete.” 8This plan was later named the Strategic Defense Initiative (SDI).

President Reagan stated that SDI would become an important tool to realize a significant
reduction and eventual elimination of ballistic missiles and nuclear weapons on such missiles in
the US and the Soviet Union.9
At first, SDI was described as a long term program to end entrapment by MAD by eliminating

Paul Stockton, “Strategic Stability between the Super-Powers,” Adelphi Papers, No. 213 (1986), p. 3.
See Tetsuya Umemoto, Nuclear Weapons and International Politics: 1945-1995 (Tokyo: Japan Institute ofInternational Affairs, 1996), pp. 102-103 (in Japanese).
7 See Desmond Ball, “The Development of the SIOP, 1960-1983,” Desmond Ball and Jeffrey Richelson (eds.),
Strategic Nuclear Targeting (Ithaca: Cornell University Press, 1986), p. 70; Eric Mlyn, The State, Society, andLimited Nuclear War (New York: State University of New York Press, 1995), pp. 55-83.
8 Ronald Reagan, “Address to the Nation on Defense and National Security,” March 23, 1983[http:// www.
reagan.utexas.edu/resource/speeches/1983/32383d.htm]. Regarding the analysis of this speech, see Gordon R.
Mitchell, Strategic Deception: Rhetoric, Science, and Politics in Missile Defense Advocacy (East Lansing,Michigan: Michigan State University Press, 2000), pp. 52-56.
9 Ronald Reagan, “Foreword Written for a Report on the Initiative, December 28, 1984,” reprinted in Nuclear
Files Archive [http://www.nuclearfiles.org/docs/1984/841228-reagan-sdi.html]. Some argued that a stronger
air defense system and civil defense network, as well as more effective non-nuclear strategy would be neededin addition to missile defense. See Leon Sloss, “The Strategist’s Perspective,” Ashton B. Carter and David N.
Schwartz (eds.), Ballistic Missile Defense (Washington D.C.: Brooking Institution, 1984), p. 46.
5
6

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nuclear missiles.10

Later, the US changed its policy to deploy BMD as a damage limitation

capability through defense of its ICBM bases.11

Whatever the US purposes were, developing SDI

was thought to be difficult given massive Soviet nuclear forces.

The technological feasibility ofhighly effective missile defense was uncertain, and it was easily assumed that the cost to build a
BMD network that would enable abandonment of MAD would be tremendous.

Furthermore, it

was likely that the Soviet Union would try to confront the US BMD networks, and that it would be
extremely difficult to offset any such Soviet effort.

There was also concern that the potential for

Soviet first strike might increase if the US departure from MAD through missile defense wasperceived to compromise Soviet retaliatory capability, or if the US BMD deployment was seen to
demonstrate an intention to launch first strike.
The practice of MAD during the Cold War in reality created a “long peace”12 by preventing direct
military confrontation between the US and the Soviet Union, as well as restraining regional
conflicts that might lead to their confrontation.

Under this situation, promoting ballistic missile

defense would have made it difficult to maintain such strategic stability.

It was thought that toleave MAD behind would take time, and that the process itself might threaten US-Soviet stability,and hence the stability of the international community.
2)

Post Cold War: Building Deterrence by Denial against Rogue States

Following the end of the Cold War, it became clear to the US that some rogue states, hostile to the
US and possessing WMD as well as ballistic missiles, could pose serious threats in regions criticalto the US interests.

Moreover, the US thought that deterrence by punishment, whether with

nuclear or conventional weapons might not by itself be sufficient to deter rogue states from using
WMD and ballistic missiles.
Firstly there is asymmetry in the motives of the US and rogue states.

The interests of rogue

states in regional conflicts are most likely the vital; to win or lose a regional conflict might put thestate and its leadership in a critical situation.

The US interests in regional conflicts, on the other

hand, would not likely threaten national survival.

Secondly, due to legal, political and moral

restrictions, it is difficult for the US to use nuclear weapons against rogue states.

Thirdly, rogue

states leaders might have values, methods, and purposes different from those of the Western world,

10 On the shift toward such deterrence posture, see Paul H. Nitze, “On the Road to a More Stable Peace,”
address to the Philadelphia World Affairs Council, 20 February 1985, reprinted in Samuel F. Wells, Jr. andRobert S. Litwak (eds.), Strategic Defenses and Soviet-American Relations (Cambridge, Massachusetts:
Ballinger Publishing Company, 1987), pp. 194-196.
11 Deputy Secretary of Defense Lehman also argued that BMD would improve the survivability of the US
strategic forces, improve the effectiveness of the US retaliatory capability, and raise risk for Soviet militaryplanners, thereby further strengthening the US deterrence. See Ronald F. Lehman III, “The Arms Control
Legacy of the Reagan Administration: A Focus on START,” Strategic Review, Vol. XVI, No. 4 (Fall 1988), p. 19.
12 John L. Gadis, Long Peace: Inquiries into the History of the Cold War (New York: Oxford University Press,
1987).

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and so might make decisions that would be considered irrational by Western standards.13
If US deterrence by punishment is not effective, there is another concern that rogue states threatsof WMD and ballistic missiles might deter the US from intervening in regional conflicts.

Suchconcern led to the argument that the US should seek damage limitation measures in addition todeterrence by punishment.14

In the case of ballistic missiles being widely proliferated to rogue

states, BMD has become an important way to limit damage when non-proliferation measures failand the US deterrence by punishment will not function, thereby leading to use of such weapons.
If BMD enables damage limitation, the US can lessen the possibility of being deterred by thethreat of attacks from rogue states.15 As demonstrated by the deployment of Patriot missiles
during the Gulf War, BMD can also provide a sense of security to allied or friendly countries, andthus maintain solidarity between the US and its allies.

In this way some argue that BMD canprovide the benefit of securing worldwide freedom of action for the US.16

In addition, if BMD

capability can be deployed worldwide, rogue states may realize the uselessness of ballistic missile
attacks against the US and its allies.
denial.17

In other words, BMD could function as deterrence by

As rogue states possess tens or hundreds of theater ballistic missiles, the interception of

their missiles is not technologically impossible, and it is unlikely that they can acquire sufficientballistic missiles forces to overwhelm the US BMD capability.18
The idea of a lower credibility of deterrence by punishment against rogue states, and the higher
probability of their using WMD, was recognized under the Clinton Administration, even if it did
not clearly state the need for shifting deterrence by punishment to deterrence by denial.

That iswhy the Clinton Administration launched the counterproliferation initiatives and as a part of it
continued to promote BMD.
3)

Post 9/11 Terrorist Attacks: Further Inclination toward Deterrence by Denial

From its inauguration the George W. Bush Administration indicated its intent to actively promote
missile defense.

After the 9/11 attacks, it clearly emphasized deterrence by denial against rogue

states and non-state actors such as terrorist groups.

For summaries of such reasoning, see Keith B. Payne, Deterrence in the Second Nuclear Age (Lexington,
Kentucky: University Press of Kentucky, 1996), pp. 79-119. See also Keith B. Payne, “Deterring the Use of
Weapons of Mass Destruction: Lessons from History,” Comparative Strategy, Vol. 14, No. 4 (1995), p. 348.
14 For such arguments, see Payne, Deterrence in the Second Nuclear Age, pp. 129-136; Colin S. Gray,“Deterrence and Regional Conflict: Hopes, Fallacies, and Fixes,” Comparative Strategy, Vol. 17, No. 1 (1998),
pp. 52-55.
15 See Keith B. Payne, “Proliferation, Deterrence, Stability and Missile Defense,” Comparative Strategy, Vol.
13, No. 1 (1994), p. 126; Payne, “Deterring the Use of Weapons of Mass Destruction,” p. 354.
16 Malcolm O’Neill, “Stability and Ballistic Missile Defenses,” Comparative Strategy, Vol. 13, No. 1 (1994), p. 115.
17 See Robert G. Joseph, “Nuclear Deterrence and Regional Proliferators,” The Washington Quarterly, Vol. 20,
No. 3 (Summer 1997), pp. 169-170; O’Neill, “Stability and Ballistic Missile Defenses,” p. 115; Payne,
Deterrence in the Second Nuclear Age, pp. 142-152.
18 See Michael Krepon, “Are Missile Defenses MAD?: Combining Defenses with Arms Control,” Foreign
Affairs, Vol. 74, No. 1 (January/February 1995), pp. 22-23.
13

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The Nuclear Posture Review of the Bush Administration submitted to Congress at the end of 2001
established a “New Triad” of offensive systems (nuclear and non-nuclear forces), defensive systems(active and passive defense), and revitalized defense infrastructure, rather than the “Cold War
Triad” of ICBMs, SLBMs and heavy bombers.

The report also stated that the US would improveits deterrence against WMD by developing defense capabilities including MD, and building
non-nuclear offensive capabilities, while reducing its dependence on nuclear weapons.

In itsNational Security Strategy (NSS) published in September 2002, the US determined that its“immediate focus will be those terrorist organizations of global reach and any terrorist or state
sponsor of terrorism which attempt to gain or use weapons of mass destruction (WMD) or theirprecursors.”19

The NSS further noted that “deterrence based only upon the threat of retaliation isless likely to work against leaders of rogue states more willing to take risks, gambling with thelives of their people, and the wealth of their nations” and that the US “will not hesitate to act alone,
if necessary, to exercise [its] right of self-defense by acting preemptively against such terrorists” aswell as rogue states. 20

The National Strategy to Combat Weapons of Mass Destruction in

December 2002 also stated that “[t]he US will continue to make clear that it reserves the right torespond with overwhelming force—including through resort to all of [its] options—to the use of
WMD against the US, [its] forces abroad, and friends and allies.”21

Further, according to the

National Strategy to Combat Weapons of Mass Destruction, the “U.S. military forces andappropriate civilian agencies must have the capability to defend against WMD-armed adversaries,
including in appropriate cases through preemptive measures,” and they “must stand ready torespond against the source of any WMD attack.”22
The posture of deterrence by denial includes the offensive defense measure, such as surgicalstrikes and counterforce, and passive defense measures of limiting damages when hit, in addition
to active defense such as MD.

The Bush Administration has even portrayed preemptive actions

and regime change against rogue state governments as elements of deterrence by denial strategy.
US inclination toward deterrence by denial reflects a post-9/11 appreciation of the threat fromrogue states and non-state actors armed with ballistic missiles and/or WMD.

Since non-state

actors obviously do not have their own territory, there are hardly any targets that can be attacked
retaliatory; thus deterrence by punishment is still less likely to function against such actors thanwould be the case with rogue states.

On the other hand, at least, effectiveness of deterrence bydenial is thought to be higher than deterrence by punishment.

For deterrence against terrorism,

deterrence by denial could prevent terrorist organizations from achieving their purposes.

In

United States of America, The National Security Strategy of the United States of America, September 2002,
p. 6.
20 Ibid. p. 15.
21 United States of America, National Strategy to Combat Weapons of Mass Destruction, December 2002, p.
3.
22 Ibid.
19－130－

other words, developing denial capabilities provides a capability to prevent the generation of“victims.”

If this becomes possible, terrorist organizations can no longer impress their“audiences.”

If so, terrorism is no longer an effective tool for such organizations, and theeffectiveness of deterrence becomes higher.23
The Quadrennial Defense Review (QDR) submitted in March 2006 listed priority areas as:
defeating terrorist networks; defending the homeland in depth; shaping the choices of countries atstrategic crossroads; and preventing hostile states and non-state actors from acquiring or using
WMD.

It also stated a shift of focus toward challenges posed by irregular, catastrophic, anddisruptive types of attacks, while maintaining capabilities to respond to against traditional
challenges. 24

The QDR urged adoption of “tailored deterrence” that enables appropriate

responses against various types of threats. 25

The “Strategic Deterrence Joint Operational

Concept” issued in February 2004 depicted a security environment with serious implications for
the US deterrence posture having unfamiliar enemies who would unhesitatingly take risks,
contradictions between asymmetry in purposes and capabilities, and the vulnerability of American
society as well as military forces.26

The effective approach under such a situation is deterrence bydenial rather than deterrence by punishment, so there is no doubt that the US will continue toreinforce its denial capabilities.

With missile proliferation continuing, missile defense is likely toremain an important element in the US denial capabilities.
4)

US Deterrence Posture toward Russia and China

The US deterrence posture after the Cold War shifted from focus on deterrence by punishment
against the Soviet Union to deterrence by denial, assuming various threats from rogue states aswell as non-state actors.

Unlike the Cold War period, when it was sufficient to consider

deterrence mainly based on the relationship between the US and the Soviet Union, today’s world
requires a deterrence posture under more complex international relationships.
by the Bush administration symbolizes this reality.

Promotion of MD

Such changes in deterrence postureundoubtedly have implications for deterrence policies against two nuclear-weapon states: Russia,
which was the focus of the US’s deterrence policy for a long time, and China, which is emerging
rapidly as a military power.
a. Toward Russia
As described before, President Bush stated in May 2001 that Russia was no longer an enemy of the
US and proposed replace the ABM Treaty “with a new framework that reflects a clear and clean

23 Ken Jimbo, Sugio Takahashi and Kei Koga “Japan’s Anti-Terrorism Measures: Building Multi-Layer Type
Anti-Terrorism Deterrence Strategy,” Research Paper of the Tokyo Foundation, February 2005, p. 18 (inJapanese) .
24 Department of Defense, Quadrennial Defense Review Report, February 6, 2006, p. 19.
25 Ibid, pp. 49-51.
26 Department of Defense, Strategic Deterrence Joint Operating Concept, February 2004, pp. 15-17.

－131－break from the past, and especially from the adversarial legacy of the Cold War.”27

In December

2001, the US officially notified the withdrawal from the ABM Treaty.
Expiration of the ABM Treaty means that there is no possibility that the START II Treaty willenter into force, and START I will lapse in 2009 (unless extended), signifying full departure froman institutionalized the MAD framework.

Of course, a MAD situation is likely to remain between

the US and Russia for at least the foreseeable future.

Russian strategic nuclear forces will

inevitably be reduced, yet they will still have sufficient capability to inflict unbearable damage on
the US, and the US MD capability will not be able to neutralize Russian forces for some time.
There is no definite answer to whether the imbalance in strategic nuclear forces between the US
and Russia will become too large to maintain a MAD situation, or whether the US can create a MD
capability that will largely undermine Russian strategic nuclear forces.
On the other hand, the fact that the US and Russia are no longer in a hostile relationship has
diminished the possibility of strategic war, a situation that has developed further through close
coordination since the 9/11 terrorist attacks.

This means that there has been a transformation ofstrategic stability between the US and Russia, as military aspects concerning strategic weapons
give way to political considerations, reducing the importance and urgency of coordinating
deterrence postures and of balancing strategic forces through negotiations on nuclear arms control
and disarmament.
In May 2002, Presidents Bush and Putin signed the “Joint Declaration on the New Strategic
Relationship” as well as the Moscow Treaty, and declared that the US and Russia would construct
a “new strategic relationship” through cooperation on a broad range of issues.
demonstrates a transformation of strategic stability.

This undoubtedly

Of course, this transformation might havebeen realized even with the continuation of the ABM Treaty framework and the development oftraditional strategic nuclear arms control, but its reality was more clearly shown throughbreaking from institutionalized MAD as well as the Bush Administration’s repeated claim that the
ABM Treaty was the adversarial legacy of the Cold War.
A change in strategic relations between the US and Russia from focus on military to politicalaspects will be favorable to international stability.

Still, the US and Russia are not allies andthere is no guarantee that such favorable relations between them will continue, even in the shortterm.

The change to a new strategic relationship is founded on a coincidence of national

interests; if such interests should collide in the future, then there is still a possibility that the US
and Russia will fall back to an emphasis on military measures to maintain strategic stability,
27 George W. Bush, “Remarks by the President to Students and Faculty at National Defense University,” Fort
Lesley J. McNair, Washington D.C., May 1, 2001 [http://www.whitehouse. ov/news/releases/2001/05/
g20010501-10.html].

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primarily through strategic forces.

In addition, a lack of transparency in strategic forces maylead to distrust and misunderstanding between the US and Russia, thereby further degradingbilateral relations.

If such a situation arises, it would be difficult to maintain strategic stability

under the situation where there is no institutionalized MAD.
In the Nuclear Posture Review in 2001, the US, at least on the surface, emphasizes that Russia is
no longer an enemy and explained that the scale of strategic nuclear force is not driven by an
immediate contingency involving Russia.
Russia.

The US also stressed that MD were not aimed at

However, if the relationship between the US and Russia becomes tense, the US will

likely reemphasize strategic nuclear forces as well as utilize missile defense.

Unless the large

economic and technological gaps existing between the US and Russia are reduced, the US is likely
to maintain quantitative and qualitative supremacy in strategic forces over Russia.
By maintaining MIRVed ICBMs, not only the US but also Russia can maintain strategic nuclear
forces with sufficient scale to inflict unacceptable damage on each other, and may be able torebuild such forces to a certain level.

If Russian strategic nuclear forces become vulnerable to US

preemptive attacks, Russia may be more motivated to use their strategic nuclear forces before
being destroyed; in other words, they may threaten crisis stability.

Furthermore, if there is anasymmetric situation in which the US develops both offensive and defensive strategic forces while
Russia does not possess defensive forces with sufficient capability to intercept strategic nuclear
weapons, Russia is likely to increase its strategic nuclear forces to overwhelm the US MD, andeven heighten its alert status, further raising motives for first strike.
It is unlikely that the US and Russia would again face such an extreme situation.

However, as

seen in the Iraq War of 2003 and the Iran’s nuclear issue since 2002, there are issues that could
trigger disputes of interests.

In the process of shifting toward a new strategic relationship, theUS and Russia must control friction through understanding of each other’s actions based onpolitical and diplomatic prudence.
b. Toward China
At present, no one can predict relations between the US and China will evolve toward
confrontation or coordination.
crossroad.”

That is why the QDR of 2006 listed China as at a “strategic

The QDR predicted that China would become an economic partner and a responsible

stakeholder, while also expressing concern over military modernization that gives China thegreatest potential to enter an arms race with the US.28
One cannot eliminate the possibility that US-China relations could develop into military28

Department of Defense, Quadrennial Defense Review Report, February 6, 2006, pp. 29-30.

－133－confrontation over Taiwan in the short term, and hegemony over the Asia Pacific region in the mid
to long term. Although competition and rivalry between the US and China can be seen in politics,
diplomacy, economics and culture, the importance of military power as a way to influence eachother’s intentions will not diminish.

In particular, deterrence based upon nuclear forces andmissile defense is likely to have serious implications for the future, whether at a strategic level(between the US and China), or at a theater level (Chinese coastal areas including the Taiwan
Strait).
(i) Strategic Level
The gap between the US and China on strategic forces is overwhelmingly in favor of the US.

The

strategic nuclear forces China deploys at present include about 20 DF-4 ICBMs (13,000 km
range).29

The US is estimated to have 4530 strategic nuclear warheads deployed on ICBMs,

SLBMs, and heavy bombers, as of January 2005.30

The US operationally deployed strategic

nuclear warheads in service are to be reduced to 1700 to 2200 by the end of 2012 under the
Moscow Treaty with Russia, but there is no requirement to dismantle these nuclear warheads ortheir delivery vehicles, and it is possible to put them back to service when needed.
China is thought to have adopted a minimum deterrence strategy which would deter nuclear
attacks by having some retaliatory capability.

However, DF-4 uses liquid fuel and requires fixedlaunchers; they are thus vulnerable to a US first strike.

The US is deploying 20 Ground-Base

Midcourse Defense (GMD) missiles to Fort Greeley in Alaska and Vandenberg in California todefend the US homeland from long range ballistic missiles.

Even though these missiles are still

at a test stage and have limited capabilities, they could intercept the few DF-4s that survived a US
first strike.

Under such conditions, China might not even be able to attack the US homeland, letalone possess a minimum level of deterrence against the US.
Since the 1980s, China has worked to modernize its nuclear forces, mainly its ground based
ballistic missiles.

China has developed DF-31 (8000 km), and DF-31A (12000km) ICBMs that use

solid fuel and mobile launchers.

DF-31 may also be converted to the JL-2 SLBM.

The US

estimates that China will have 75 to 100 strategic nuclear warheads by 2015. 31

With theimproved survival rate of such missiles, China will likely recover a minimum deterrence
capability.
For China’s ballistic missiles, see Robert A. Manning, Ronald Montaperto and Brad Roberts, China,
Nuclear Weapons, and Arms Control: A Preliminary Assessment, Chairman’s Report of a roundtable jointly

29

sponsored by the Council on Foreign Relations, the National Defense University, and the Institute for
Defense Analyses, pp. 19-26; Shirley A. Kan, “China: Ballistic and Cruise Missiles,” CRS Report for Congress,
97-391F (updated August 10, 2000), pp. 1-16.
30 Robert S. Norris and Hans M. Kristensen, “U.S. Nuclear Forces, 2005,” Bulletin of the Atomic Scientists,Vol. 61, No. 1 (January/February 2005), pp. 73-75.
31 Unclassified Summary of a National Intelligence Estimate, Foreign Missile Developments and theBallistic Missile Threat Through 2015, December 2001. [http://www.cia.gov/nic/pubs/other_products/
Unclassifiedballisticmissilefinal.htm].

－134－However, it is doubtful that the US will tolerate China’s capability to carry out nuclear attacks on
the US homeland.
Soviet Union.

China’s strategic nuclear forces are extremely limited compared to those of theMoreover, the US has improved its MD capabilities.

has claimed that the US MD will not be a threat to China.32

The Bush Administration

However, there is the argument that

the US should promote MD not only to deter China, but to prevent the US from being deterred by
China.33

It is unlikely that the US would refrain from directing more capable MD forces against

China.

In that case, the US may establish a denial capabilities that would effectively neutralize

China’s strategic nuclear forces.
Loss of a minimum deterrence capability means that China would no longer be able to deter USintervention in Taiwan through retaliatory attacks on the US,34 and lose its status as one of few
major powers with capability to threaten the US homeland.
can never ignore.

This situation is something China

If the US aims to establish deterrence by denial toward China, China must

introduce some countermeasures.

These could include: accelerated build-up of ICBMs and

SLBMs, addition of MIRV warheads, or adoption of Maneuverable Reentry Vehicle (MaRV), as
well as decoys.35

On the other hand, increasing its missile inventory could obstruct China’s

economic development, its highest priority, so this could limit a missile build-up.
Considering the future deterrence relationship between the US and China in simplified terms, it
depends on the US MD development versus China’s capability to increase strategic missiles.

If

the interception capabilities of US MD forces are limited, or China has a sufficient number ofstrategic missiles to overcome US missile defense networks, China can at least secure minimum
deterrence. Unlike the case where both countries only possess offensive forces, the situation inwhich the US deploys defense capabilities may complicate the strategic calculations of bothcountries.
(ii) Theater Level
Whatever a deterrence relationship at the strategic level is established between the US and China,
it is not likely that China will surrender to the US at the theater level.

Loss of capability to

32 For example, “U.S., China to Discuss Missile Defense,” Statement by the Press Secretary, Office of the Press
Secretary, The White House, Washington, DC, September 4, 2001 [http://www.state.gov/t/ac/rls/rm/2001/4803.
htm]; Elisabeth Rosenthal, “American Aide Meets Chinese on U.S. Pullout from ABM Pact,” The New YorkTimes, December 18, 2001 [http://www.nytimes.com/2001/12/18/international/asia/18CHIN.html].
33 See Richard D. Fisher, Jr. and Baker Spring, “China’s Nuclear and Missile Espionage Heightened the Needfor Missile Defense,” Backgrounder, The Heritage Foundation, No. 1303 (July 2, 1999); Leon Sloss,“Deterrence, Defenses, Nuclear Weapons and Arms Control,” Comparative Strategy, Vol. 20, No. 5 (2001), p.
438.
34 Remarks of Chas. W. Freeman, former Assistant Secretary of Defense to Chinese officials in 1996. (Foreign
Policy Alert, No. 26 (October 9, 1996) [http://afpc.org/fpa/fpa26.htm])
35 China has shown interest in countermeasures against missile defense since the 1960s and is said to beproceeding with research and development. See Ballistic Missile Defense Organization (BMDO), “Country
Profiles: China,” BMDO Countermeasure Integration Program, April 1995.

－135－

ensure its position in East Asia, particularly on Taiwan and resources in littoral seas, would
seriously damage China’s national interests.

If there is a probability that China could bedeterred by the US at a strategic level, China would react by concentrating its resources forbuilding up theater and tactical nuclear forces.36
China’s nuclear-armed SRBMs and MRBMs use solid fuel and mobile launchers.

They are highly

survivable from surgical strikes and their accuracy is thought to be relatively high.

China aims

to acquire countervalue as well as counterforce capabilities, thereby deterring not only nuclear but
also conventional attacks.

China is reportedly seeking a limited deterrence capability, which

would control the escalation of conventional conflicts to nuclear war. 37

Targets for China’s

ballistic missiles could include the bases of the US Forces in Japan, and the US naval forces
deployed near Japan.

China has imported many weapons from Russia, including SU-27 andSU-30 fighter jets, Sovremenny class destroyers, and Kilo class submarines.

These are also

aimed to prevent the US intervention in conflicts on the seas near China.
US capabilities that can oppose China at the theater level world include SLCMs and precision
guided munitions as counterforce capabilities, and missile defense.

Considering the progress ofChina’s modernization of SRBMs and MRBMs, it may be difficult to entirely neutralize theseforces.

However, even certain level of damage limitation capability may prevent China fromdeterring the US.

It would also lower the possibility that China could undermine the US

credibility of extended deterrence for its allies.
At the theater level, the deterrence relationship between the US and China will become more
complicated than that at the strategic level.

Both the US and China already have levels of

missile capabilities that cannot be neutralized by the other.

Both are trying to maintain denial

capabilities, so that if Japan (and Taiwan) deploys missile defense systems, calculations related todeterrence will get even more complicated.
relations.

This fact may restrain a deterioration of US -China

On the other hand, it could also raise motives for first strike.

In this case, there is aneven higher probability that both countries could be drawn into an arms race at the theater levelto establish a more advantageous deterrence posture.

About the countermeasures China is expected to take, see David M. Lampton and Gregory C. May, A Big
Power Agenda for East Asia: America, China, and Japan (Washington D.C.: The Nixon Center, 2000), pp.
47-49; Paul H.B. Godwin, “Potential Chinese Responses to US Ballistic Missile Defense,” Report, The Henry36

L. Stimson Center, No. 43 (January 2002), pp. 3-9.
Regarding limited deterrence, see Alastair Iain Johnston, “China’s New ‘Old Thinking’: The Concept ofLimited Deterrence,” International Security, Vol. 20, No. 3 (Winter 1995/96), pp. 5-42. A shift toward limited
deterrence will require the modernization and build-up of nuclear forces including improvements in precisionand survival. Also it is essential to strengthen command, control, communication and information (C3I) as
well as early warning systems. See Paul H.B. Godwin, “PLA Doctrine and Strategy: Mutual Apprehension in
Sino-American Military Planning,” prepared for The PLA and Chinese Society in Transition, a conference
sponsored by the National Defense University, Washington D.C., October 30-31, 2001 [http://www.ndu.edu/
inss/China_Center/PGodwin.htm]
37

－136－

3.

Deterrence Posture for Japan’s Ballistic Missile Defense

1)

Traditional Deterrence Posture of Japan

Article 9-1 of Japan’s Constitution states that “[a]spiring sincerely to an international peace basedon justice and order, the Japanese people forever renounce war as a sovereign right of the nationand the threat or use of force as means of settling international disputes.”

However, it has beeninterpreted that the Constitution allows the exercise of minimum force for self-defense.38

In

addition, Japan maintains exclusively defense-oriented policy based on the spirit of theConstitution by limiting defense forces to a necessary minimum, while using force only in thesituation where there is no appropriate means to deal with this aggression other than resort to theright of self-defense.39

The 2005 National Defense Program Guideline stated that “[t]he firstobjective of Japan’s security policy is to prevent any threat from directly reaching Japan and, inthe event that it does, to repel the threat as well as to minimize the damage.”This exclusively defensive-oriented policy is based on defensive deterrence by denial.

Accordingto the Japanese Government’s interpretation, offensive denial capabilities, which include surgicalstrike against opponent’s missile bases, would be permitted under the right of self-defense, as longas there are no other feasible defense measures.40

In reality, however, Japan has not possessedsuch capabilities.
Moreover, Japan’s Constitution has been said to prohibit the possession of weapons that canenable deterrence by punishment, such as ICBMs, long-range strategic bombers, and attack
aircraft carriers.

This is because Article 9-2 prohibits capabilities beyond defense powers ofminimum necessity; so-called offensive weapons, used only to inflict destruction of an enemy’s land,
naturally fall outside the minimum force necessary for self-defense.41

In regards to nuclear

weapons, the Government has interpreted that any nuclear weapons classified to be within thescope of minimum necessary self-defense are permissible,42 but the Government has also adopted
the three non-nuclear principles of “not possessing nuclear weapons, not producing them and not
permitting their introduction in Japan.”Japan is a non-nuclear-weapon state party to the NPT,

thereby formally renouncing the right to possess nuclear weapons under the international law.
Undoubtedly, such policies of renouncing the right to possess WMD, including nuclear weapons,“Written answers to the questions by Representative Kiyoshi Mori”, December 5, 1980.
“Written answers to the questions by Representative Yutaka Hata,” November 15, 1985. , November 15,
1985
40 Answers by Prime Minister Ichiro Hatoyama (read by Naka Funada, Director-General of the Defense
Agency) at the Cabinet Committee of the House of Representatives, February 29, 1956.
41 Answer of Tsutomu Kawara, Director-General of Defense Agency at the Budget Committee of the House ofCouncilors, April 6, 1988.
42 Answer by Reijiro Tsunoda, Director-General of Cabinet Legislation Bureau, at the Budget Committee ofthe House of Councilors, April 5, 1982.
38
39

－137－

and ballistic missiles were set without reflecting on the serious threats to Japan of nuclear
weapons and ballistic missiles.

Yet, Japan is now facing such threats.

As stated above, there

are several countries in Northeast Asia possessing or capable of possessing such weapons. Japan
recognizes the existence of real and potential threats from countries such as North Korea, China
and Russia.

With a narrow width of land and concentrated population and industries, Japan isespecially vulnerable to nuclear attack and intimidation.
To deter such threats, Japan, in alliance with the US through the Japan-US Security Arrangement,
relies on extended deterrence provided by the US.

Japanese Defense Guidelines of the past

continuously reaffirmed that against threats of nuclear power Japan will rely on nuclear
deterrence of the US.

The 1997 “Guidelines for Japan-US Defense Cooperation” confirmed thatJapan Self-Defense Forces (SDF) are to operate mainly in and around Japan, while the US Forces
support the SDF and conduct complementary operations that would include exercising offensive
power. This means that Japan is largely dependent on the US capabilities even for deterrence bydenial to attack opponent’s military based including ballistic missile ones (offensive defense).
As seen here, Japan has maintained deterrence by possessing independent capabilities for
defensive deterrence by denial, while relying on the US for deterrence by both denial andpunishment.
2)

Japan’s Deterrence Posture against Ballistic Missile Threats

Today’s security environment surrounding Japan is rapidly changing with the proliferation of
nuclear weapons and ballistic missiles in Northeast Asia.

Japan is thus forced to change its

deterrence posture.
Japan’s introduction of BMD will undoubtedly strengthen its defensive deterrence by denial as
long as Japan can procure sufficient capabilities in quality as well as quantity.

Of course, BMD

systems cannot guarantee a 100 % success rate in intercepting ballistic missiles, but they can
restrict an enemy’s capabilities to attain political and military advantage through actual or
threatened ballistic missile attacks, while complicating his strategic calculation.

If there are

increased uncertainties in achieving of the goal by using ballistic missile, an enemy will be morecautious in considering such actions.

In addition, effective BMD may restrain increases andproliferation of ballistic missile inventories.
To strengthen deterrence by denial through BMD, one needs to get an enemy to recognize that the
BMD system can intercept ballistic missiles effectively.

Japan should continuously improve theeffectiveness of BMD systems while demonstrating their capabilities through tests and exercises.
However, BMD as an active defense measure by itself would not provide sufficient deterrence
against ballistic missile attacks.

As mentioned before, BMD systems cannot be completely－138－effective in intercepting hostile missiles.

Japan needs to combine BMD with other measures tolessen the threat of ballistic missiles, thereby building stable and powerful deterrence.
For example, Japan needs to contemplate deterrence by denial through offensive defense
capability.

If an enemy is preparing to attack Japan with ballistic missiles, preemptive attacks

on ballistic missile bases will undoubtedly lessen potential damage to Japan.

Moreover, suchaction may increase the possibility of a BMD system intercepting ballistic missiles unharmed byattacks on their bases.

In this way, the combination of offensive and defensive systems may havea synergy effect on deterrence by denial. It would be preferable to have more politicallycontrollable capabilities such as precision guidance weapons.
Even if ballistic missiles avoid interception and hit Japan, it is still possible to take appropriate
damage confinement measures as part of passive defense.

Such damage confinement measures

may enhance the effects of defensive deterrence by denial.

Establishment of the Law to Protect

Citizens is the first step toward such confinement measures, and its implement is needed.
［Offensive defense and passive defense will be further discussed in Chapters 10 and 11］
To strengthen the overall deterrence of Japan against ballistic missile attacks, it is necessary toconsider deterrence by punishment in addition to the development of deterrence by denial
discussed above.

In this respect, the deployment of effective BMD by Japan will benefit to thereinforcement of the extended deterrence provided by the US.

The key is the relationshipbetween the US and Japan, as well as the damage confinement capabilities of both the provider
and recipient of extended deterrence.
If the US, the provider of extended deterrence to Japan, has considerable damage confinement
capability—such as an effective MD system—there is a higher probability of the US absorbing
punishment attacks, raising the credibility of its extended deterrence.
thus lessen the possibility of the US abandoning Japan.

The US MD readiness will

In addition, if Japan develops its BMD

capabilities further, an enemy will need to plan on a greater scale of attacks for achieving its
objectives,which would in turn increase the likelihood of the US retaliation, thus deterring attacks
on Japan.43

Japan’s BMD system will also provide a degree of response against ballistic missile

attacks on the US bases in Japan, so complementing the US damage confinement capabilities.
The information sharing between Japan and the US through BMD systems will contribute to themissile defense of the US homeland, which will further lessen the vulnerability of the US, andthus the credibility of the US extended deterrence.

43

Tetsuya Umemoto, “Lecture at Japan-US Ballistic Missiles Defense Seminar”, Gekkan Nippon Special

Edition, April 2002, p. 71 (in Japanese) .

－139－

Japan and the US can build an even closer relationship through BMD.
will need much closer cooperation with the US.

BMD operations in Japan

By strengthening the capability of Japan toconfine damage from ballistic missile attacks, Japan can decrease the possibility of surrendering
to intimidation that could lead to denying cooperation with the US.

Effective BMD cooperation

would also mitigate concerns that Japan will be involved into the US conflicts with others, andreduces the possibility of “decoupling” Japan and the US.

Closer relationship between Japan andthe US will heighten the importance of Japan as a key ally to the US, and further increase thecredibility of the US extended deterrence in case of crisis in Japan.
Since May 2006, North Korea has taken provocative postures and countries such as China
attempted dissuasion diplomacy.
early July.

However, North Korea conducted ballistic missile launches inLack of sufficient denial capabilities such as BMD on the part of Japan and the US

might have been a factor in the North Korean actions.
diplomacy without power to support it.

It certainly proved the limited effect ofIf Japan and the US develop denial power that also

increases the credibility of the US extended deterrence to Japan, reckless behavior by North Korea
as well as intimidation with political intentions can be deterred more effectively.
Furthermore, if North Korea realizes that missile attacks will not be effective due to BMD as well
as offensive and passive defense measures by Japan and the US, North Korea would dissuade to
implement such attacks.
regime.

North Korea places highest priority on continuation of the current

If there is an increased probability that the US will conduct military operations against

North Korea which attacks on Japan, then it will likely result in the collapse of North Korea’s
regime.

In this way North Korea’s attacks on Japan will be deterred.

One reason why China expressed strong concerns over the introduction of BMD to Japan is thefundamental change it has on the characteristics of the Japan-US alliance.

Through introductionof BMD, the Japan-US alliance has become closer than ever, which may hinder China’s efforts to
weaken the influence of the US in the region. Moreover, the shift of Japan-US alliance fromdefense to regional stability will be accelerated.

China have concerned that the defense powers ofJapan may be used to respond to conflicts over Taiwan and the South China Sea.44

If Japan with

the US bases is to deploy effective BMD, it will be especially difficult for China to force Japan tostop the support for the US simply by intimidation of possible ballistic missile attack.

Moreover,

if Chinese ballistic missile attacks on the US bases in Japan can be neutralized by BMD, China,
which may seek a limited deterrence strategy, will have difficulty in controlling conflict44

See Michael R. Chambers, “Rising China: A Threat to Its Neighbors?” Carolyn

Pumphrey(ed.), The Riseof China in Asia:Security Implications (Carlisle,PA: strategic Studies Institute,2002), pp. 74-75.

－140－

escalation.45
As mentioned before, introduction of BMD to Japan may complicate theater and tactical level
deterrence between the US and China, and accelerate China’s build-up of MRBMs.

However,such action would highlight the inconsistencies of China’s nuclear policies.

China declares anunconditional negative security assurance toward non-nuclear-weapon states.

This means that

China does not use or threaten to use nuclear weapons against Japan.

If China increases MRBM

capabilities in reaction to Japan’s introduction of BMD, that would increase the suspicion that
China in reality maintains the option of nuclear attacks on Japanese territories, including US
bases in Japan.
If Japan’s deterrence has greater credibility due to the introduction of BMD and improvement ofextended deterrence, pressure on Japan to develop its own nuclear attack capabilities will belessened.

Currently, Japan has the technological potential to manufacture nuclear weapons andballistic missiles, which may make other countries cautious in their actions.

On the other hand,such potential could invite suspicion of Japan’s intentions on the development of nuclear weapons.
Japan’s going nuclear would undoubtedly have unfavorable effects on the security environment
surrounding Japan, including arms race in the region.

The strengthening of BMD and extended

deterrence may avoid tension over nuclear weapons development, and allow Japan to maintain its
three non-nuclear principles, as well as its disarmament and non-proliferation policies.
BMD will strengthen Japan’s denial capabilities.

By developing an appropriate system to defend

against ballistic missile attacks, Japan can lessen its vulnerability and demonstrate its will not tosurrender to intimidation.
in the face of crises.

This will also enable Japan to maintain rational decision-making even

However, technological limitations of BMD and budget constraints will likely

prevent the completion of a deterrence posture in Japan.

That is why it is necessary to make thedeterrence systems more stable and effective through not only BMD as an active defense measure,but also the integration of other measures included in the 5Ds described above.

45 In regard to the reasons why China opposes Japan-US NTWD cooperation, see Kaori J. Urayama,“Chinese Perspectives on Theater Missile Defense: Policy Implications for Japan,” Asian Survey, Vol. XL, No.
4 (July/August 2000), pp. 600-607; Michael Swaine, Rachel Swanger and Takashi Kawakami, Japan andBallistic Missile Defense (Santa Monica: RAND, 2001), pp. 79-80.

－141－Chapter 10
1.

Offensive Defense Measures

Necessity of Offensive Defense Measures

In December 2004, Japan made a decision to introduce BMD as an active defense measure against
ballistic missile attacks.

However, Japan still did not have BMD capability at the time of North

Korea’s ballistic missile launches in July 2006.

Japan’s BMD system is still under development,at the initial stage in a spiral approach to acquiring this capability.

Even if more effective BMD

capabilities are developed in the future, military common sense says that completely successfulinterception will be unlikely.

Ballistic missiles with WMD warheads, especially nuclear weapons,

which evade interception will likely inflict tremendous damage.

Thus, attacks on enemy ballistic

missile bases as a measure of offensive defense would be effective in reducing or eliminating thethreat of such missiles.
Under the Japan-US Security arrangement, the US will take the role of “offensive defense” todefend Japan.

The 1997 Guidelines for Japan-US Defense Cooperation emphasize that Japanese

Self-Defense Forces (SDF) and US Forces would have to cooperate closely on BMD operations; US
Forces are to deploy units with attack capability and take the lead in carrying out attacks onballistic missile bases when necessary.

However, if US Forces are operating in other regions, or

do not have sufficient power for strike operations, the US will likely expect Japan to share this role.
Also there may be some possibility that the US will refrain from preemptive attacks on missile
launch sites to defend Japan.
In such situations Japan would need to remove immediate threats on its own.

To respond tochanges in its security environment and develop longer term defense power, Japan should clearly
demonstrate its will to develop offensive capability against opponent’s missile launch sites.
However, Japan has never developed such capability because of its so-called “exclusively
defense-oriented policy.” Thus various policy issues need to be solved for the SDF to move toward
such capability, which will in any case take many years to implement.
support US Forces it relies on to attack missile launch sites.

Until then, Japan needs toJapan also needs to study joint

operations with US Forces to develop surgical strike capability, and develop the technicalcompetence of Maritime and Air SDF personnel in anticipation of acquiring such capability.
2.

Offensive Defense and BMD

1)

Significance of Offensive Defense

Offensive defense measures to attack missile launch sites were one of the most important means
to limit damage from ballistic missile attacks before BMD technologies established.

During theCold War, one of main missions for the US ICBMs was counter-force against Soviet military
targets, especially its ICBM forces.

The US continued to emphasize counter-force in its

operations even after the adoption of Assured Destruction strategy based on counter-value, which－142－

is to attack cities and industrial infrastructure.1

The US tried to improve counter-force capability

by increasing the accuracy of ICBMs and adding the prompt hard-target kill capability, so toincrease effectiveness against enemy ICBM silos.2
Japan’s BMD system has been technologically proven but is still in development, so it may nothave sufficient capability against an enemy ballistic missile force qualitatively or quantitatively.
Therefore, for the foreseeable future, attacks on ballistic missile launch sites will be essential as
an offensive defense measure just as BMD is needed as an active defense measure.

If BMD

capabilities can be developed to effectively intercept ballistic missile threats under every
conceivable condition, there may be less urgency in attacking missile launch sites.

However, thiswould not lower the significance of such offensive defense measures.
As mentioned before, no matter how advanced BMD capability may become, it will not have a
100% probability in intercepting ballistic missiles; this is an inherent limitation of defensive
weapons.

Moreover, if such the capability of a BMD system is restricted to the interception ofincoming ballistic missiles, opponents can launch ballistic missiles again from the same launchsites.

By developing the means to attack missile launch sites, it will become possible to limit anenemy’s ability to make further ballistic missile attacks.

Moreover, continuous attacks onballistic missile launch sites will restrict enemy operations, possibly reducing the number ofballistic missiles launched.

“Suppressive effect” of offensive defense was seen during the Gulf

War in 1991.3
If it is possible to decrease the number of incoming ballistic missiles, BMD will have much moremargin for operation.

Considering the fact that costs for BMD system are much higher than thatof ballistic missile targeted, attacks on missile launch sites can also benefit the efficient use ofvaluable BMD resources.

Offensive defense measures to attack missile launch sites cancomplement active defense through BMD, thereby enabling more effective response against
ballistic missile attacks.
2)

Examples and Lessons of Offensive Defense

Since the emergence of air power, air strike operations aimed at disabling an adversary’s
capabilities have been carried out with considerable success.
1

Various sensors and air defense

See Desmond Ball, “The Development of the SIOP, 1960-1983,” Desmond Ball and Jeffrey Richelson (eds.),

Strategic Nuclear Targeting (Ithaca: Cornell University Press, 1986), p. 70; Eric Mlyn, The State, Society, andLimited Nuclear War (New York: State University of New York Press, 1995), pp. 55-83.
See “Press Conference of U.S. Secretary of Defense,” National Press Club, Washington D.C., January 10,
1974, reprinted in P. Edward Haley, David M. Keithly and Jack Merritt (eds.), Nuclear Strategy, Arms
Control, and the Future (Boulder, Colorado: Westview Press, 1985), pp. 94-100; Harold Brown, “Nuclear War
Strategy, PD-59,” statement before the Senate Foreign Relations Committee, September 16, 1980, reprinted
in Haley, et al, Nuclear Strategy, Arms Control, and the Future, pp. 101-107.
3 Sugio Takahashi, “Coping with a Ballistic Missile Threat: Strike Capability under an Exclusively
Defense-Oriented Policy,” Boei Kenkyujo Kiyo, Vol. 8, No. 1 (October 2005), p. 113 (in Japanese) .
2

－143－

weapons have also been developed in response to such strikes.

Advancements in militarytechnologies have further heightened the capabilities of both offense and defense and combat is
now undertaken using not only traditional air power, but also with precision-guided weapons inhighly advanced electronic environments.

Currently the operational form of offensive groundwarfare is usually a strike package, which the US adopted during the Gulf War in 1991.

The

strike package consists of air units with functions including ① accurate location of groundtargets; ② Suppression of Enemy Air Defense (SEAD); ③ precision bombing.

Attacks onballistic missile launch sites would be based on use of a strike package combined with cruise
missiles for stand-off precision attacks.
At the time of the Gulf War, the US conducted massive “Scud hunts” using strike packages.
Although such operations did not destroy whole of the Iraq’s Scud forces, it succeeded in greatly
reducing the number of Scud launches.

This undoubtedly proved the effectiveness of offensive

defense measure in reducing enemy ballistic missile attacks.

However, since Iraqi Scuds usedmobile launchers, it was extremely difficult to detect, identify, and target the launchers, leaving
many issues for future resolution.
From the lessons learned during the Gulf War, the US developed the concept of Network-CentricWarfare (NCW) using modern information technologies (IT).

The US was able to refine thisconcept through experience in the Kosovo air strikes, anti-terrorism operations in Afghanistan,and the Iraq War.

The sensor-to-shooter time (that required from acquiring target information toissuing attack orders) was reduced from up to several days during the Gulf War, to several hours
during the Afghan War, to several tens of minutes during the Iraq War through the use of time
sensitive targeting enabled by NCW and precision guided munitions.

In this way, a command to

attack new targets or change targets can be sent in almost real time to aircraft already in the air.
As a result, the destruction rate of mobile launchers is greatly improved.

During the Iraq War, 46

of about 80 or about 55% of Iraq’s mobile launchers were destroyed.
Sensor-to-shooter time could be shortened to seconds in a future war, so offensive defense
measures may become still more effective against mobile launchers.

The No Dongs of North

Korea that directly threaten Japan use mobile launchers, so there has been some doubt on theeffectiveness of attacking missile launch sites because of tremendous difficulties in finding andaccurately striking such mobile sites.

However, development of ground attack systems using

current technological standards would assure the effectiveness of attacks on missile launch sites.
The US is accelerating efforts for a Global Strike program to quickly neutralize hostile military－144－

facilities with WMD, ballistic missiles, and command and control systems.4

The Global Strike isconsidered a key element of the US strategy to build active and multi-layered defense in depth
against threats of WMD and/or ballistic missiles as far away as possible from the US homeland.5
The Global Strike emphasizes strengthening the capabilities of conventional forces (conventional
Global Strike).6

Some SLBMs and ICBMs of the US are to be converted to the conventional

missions as an initial capability.
hour of a decision.

They could carry out precision conventional attacks within one

On the other hand, their use risks the possibility that Russian early warning

systems could mistake them for strategic nuclear attacks against Russia.

To reduce such risks,

the US is considering measures to provide transparency in the operation of such systems andconfidence-building measures (CBM) that include notification of missile launches.7
3. Japan’s Policy toward Offensive Defense
In the past, Japan had no capability to implement offensive defense measures, although theJapanese Government has stated that such capabilities would not infringe upon Japan’sConstitution and the principles of its national security policies.

Under the current Constitution,

Japan sets its fundamental defense policy as exclusively defense-oriented, determines security
policies on that principle, and maintains minimum forces required for self-defense.

Exclusively

defense-oriented policy has been defined as the posture of defense strategy in passive manner thatis consistent with the spirit of the Constitution so to exercise defense power only when armed
attack is initiated, and to possess defense power limited to minimum required for the purpose of
self-defense.8

Minimum defense power has been interpreted as one that varies depending on theprevailing international situation, the standards of military technology and various otherconditions, but it is unconstitutional to possess what is referred to as offensive weapons that, fromtheir performance, are to be used exclusively for total destruction of other countries, since it
immediately exceeds the limit of the minimum necessary level of self-defense.

Therefore, theSDFcannot possess, for example, ICBMs, long range strategic bombers, or attack aircraft carriers.
However, such interpretations of the Constitution and fundamental national security policy do notnecessarily deny the implementation of offensive defense measures in attacking ballistic missile

In regards to the Global Strike, see Hans M. Kristensen, Global Strike: A Chronology of the Pentagon’s New
Offensive Strike Plan (Washington D.C.: Federation of American Scientists, 2006).
5 Chairman of the Joint Chief of Staff, National Military Strategy to Combat Weapons of Mass Destruction,
4

13 February 2006.
6 For conventional global strike, see Peter C.W. Flory, Assistant Secretary of Defense, International Security
Policy, “Statement,” Before the Strategic Forces Subcommittee, Senate Armed Services Committee, March 29,
2006; James E. Cartwright, Commander, United States Strategic Command, “Statement,” Before theStrategic Forces Subcommittee, Senate Armed Services Committee, March 29, 2006.
7 In regards to the conversion to conventional global strike by Trident SLBM, see Flory, “Statement”; Charles
B. Young, Director, Strategic System Program, “Statement,” Before the Subcommittee on Strategic Forces of
the Senate Armed Services Committee, March 29, 2006; Cartwright, “Statement”. The Quadrennial Defense
Review of 2006 also recommended to shift of Tridents to conventional services.
8
See the web site of the Japan’s Ministry of Defense[http://www.mod.go.jp/e/defense_policy/japans_defense_
policy/index.htm].

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launch sites directed toward Japan.

In February 1956, the Government of Japan made astatement on this matter that it was not in the spirit of the Constitution to sit and wait to be
destroyed, and that when no other means were available, it was lawful to attack enemy bases thatpossess guided missiles.9
In reality, however, Japan has no weapons capable of attacking enemy ballistic missile launchsites.

During the Cold War, such threats to Japan came mostly from the Soviet Union, but

attacks on the Soviet Union were left for US Forces under the Japan-US Security arrangement.
The share of roles between Japan and the US, in which US Forces were to conduct attacks onenemy bases to defend Japan, was reconfirmed under the 1997 Guidelines for Japan-US defense
cooperation.

Moreover, Japan’s National Defense Program Guideline (NDPG) does not include

attacks on enemy territory as a role for Japan’s SDF, and JDA (now Ministry of Defense)’s
Mid-Term Defense Program (MTDP) does not include the development of capability to attack
enemy territories including ballistic missile launch sites.
North Korea’s launch of a Taepo Dong 1 ballistic missile in August 1998 and its admission of
nuclear weapon development activities in October 2002 accelerated the reconsideration of suchpolicies.

North Korea possesses missiles with WMD, and are said to have deployed about 200 No

Dong missiles that can cover the entire area of Japan.

Realizing the fact that threats has grown

rapidly fueled the argument that Japan should seriously consider the capability to attack missile
launch sites in response to such threats.
In March 1999, then JDA Director-General Norota confirmed that armed attacks occur not only
when Japan suffers damage but also when an invading country initiates to prepare for armed
attacks, and that if there is no other measure to defend from attacks such as those of guided
missiles, to attack an enemy’s guided missile bases is within the legal right of self-defense.10

In

addition, former JDA Director-General Ishiba told the Diet in January 2003 that if an opponent
expressed a desire to make Tokyo a “sea of fire” and initiated preparations for ballistic missile
launches, it can be construed as the start of an armed attack.11

The following March, he also

stated that offensive defense measures would be “worthy of review.”12

The 2005 NDPG andassociated MTDP did not clearly discuss offensive defense measures against ballistic missile
launch sites, but stated that “response to invasion against outlying islands” as one of “new threats
and various situations” requiring response by Japan.

The new MTDP also stated intent to

Answer of Prime Minister Ichiro Hatoyama (read by Director-General of the Defense Agency, Naka
Funada）at the Cabinet Committee of the House of Representatives, February 29, 1956.
10 Answer of Hosei Norota, Director-General of the Defense Agency, at the Security Committee of the Houseof Representatives, March 3, 1999.
11 Answer of Shigeru Ishiba, Director-General of the Defense Agency, at the Budget Committee of the Houseof Representatives, January 24, 2003.
12 Answer of Shigeru Ishiba, Director-General of the Defense Agency, at the Security Committee of the Houseof Councilors, March 27, 2003.
9

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acquire air-to-air refueling and transport aircraft (KC-767) and fighter jets (F-2).

The F-2s can bearmed with Joint Direct Attack Munitions (JDAM), conventional bombs with precision guidance.
Such capabilities can be used to attack ballistic missile launch sites.
North Korea’s missile launches in July 2006 prompted further discussion on offensive defense
measures.

JDA Director-General Nukaga stated that it is natural for an independent country tothink of having minimum defense capability within a certain framework, indicating the need forcapabilities to attack enemy missile launch sites.

Chief Cabinet Secretary Abe also commented

on the need to develop a rationale on missile launch site attacks within the role-sharing of theJapan-US Alliance.

On the other hand, both ministers and the Government of Japan itself notedthat discussion on such matters should be proceeded with caution.

While there were somearguments opposing the comments of both ministers, these failed to distinguish between“preventive attacks,” “preemptive attacks” and “counter-attacks” on missile launch sites, and evenargued against preemptive and counter-attacks which are allowed as an inherent right ofself-defense. On the other hand, some arguments making more allowance for preemptive attacks
did not include actual requirements for such attacks. Arguments such as how to maintain propercounter-attack capability were not fully developed.

As such, discussion in Japan of possible

attacks on enemy missile launch sites is rather immature and underdeveloped.
4.

Significance of Japan’s Possession of Offensive Defense Measures

While Japan currently lacks any meaningful offensive defense measures to attack ballistic missile
launch sites, acquisition of such capability will have significant impact on national strategy andmilitary power.
1)

Strategic SignificanceAmong 21st Century threats are sudden, unexpected attacks that bring massive destruction, suchas the 9/11 terrorist attacks.

Countries or non-state actors such as international terrorist groups

which are not hesitated to resort to such attacks may not be deterred by punishment based on
retaliation. As described before, the US is trying to strengthen deterrence as well as defense incase of deterrence failure by combining both offensive and defensive measures under a new
strategy of deterrence by denial.

Given this new security environment, Japan should not be

overly dependent on the extended deterrence provided by the US as it was during the Cold War,but build a new strategy of its own.
As Japan is facing a threat of ballistic missile attack from North Korea, it needs to seriously
consider possessing offensive defense measures, based on precision-guided conventional weapons,
for compensating the lack of geographical depth of defense.

It is undoubtedly important toprevent the rise of crises through non-military measures, as seen in present efforts to solve theNorth Korean nuclear problem through the Six-Party Talks.

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Yet, as clearly demonstrated by theactions of North Korea, it is not possible to prevent the proliferation of WMD or ballistic missiles
solely by diplomatic measures (dissuasion diplomacy).

Therefore, it is essential to have a reliable

hard response, in other words a military response, which can neutralize the effects of possessing
WMD or ballistic missiles.
The presence of credible military capabilities would not only provide deterrence for Japan but also
support non-military measures such as diplomacy. Japan, the US, and South Korea differ in theirinterests on North Korean nuclear and missile issues.

Taking advantages of such differences,

North Korea has attempted to distance the US and South Korea or Japan and the US. Already,South Korea is increasingly inclined to take actions differing from Japan and the US, due in partby the Roh Moo-hyun Administration’s policies and attitudes toward North Korea.

Moreover,North Korea uses concern over the abduction of Japanese citizens as a diplomatic card against
Japan, and has attempted to shake up the relationship through summit meetings with Japanesepolitical leaders.

North Korea may also attempt to intimidate Japan by using its ballistic missile

card to split a close Japan-US relationship and obstruct Japan-US diplomatic efforts.

Japan’spossession of credible military measures would support the proper diplomacy without
surrendering North Korean maneuvers and intimidation.
Japan’s efforts to introduce BMD and start serious discussion on offensive defense measures may
have made Japanese diplomacy more effective in responding to the North Korean missile launches
of July 2006.

China and Russia agreed to the UN Security Council resolution strongly

condemning North Korea because they wanted to take an initiative in restricting North Korea’s
movement toward WMD and missiles, but also because China, in particular, was wary of Japandeveloping a more active security policy.
On the other hand, the North Korean nuclear issue is hardly progressing through the Six-Party
Talks because of historically friendly relations between China and North Korea, South Korea’s
appeasing attitude toward North Korea, and an interplay of strategic interests between the US
and China.

Japan wanted to be involved in such strategic dialogue but has not been able toactively participate, partly because of negative factors from its past but also because Japan has
been unable to present distinct arguments of its own.
If Japan wants to take an initiative to resolve North Korean issues comprehensively, including
nuclear, ballistic missile, and abduction matters, it must have sufficient influence on security
concerns.

For this Japan needs military capability to support diplomatic negotiating power.

Since Japan refuses to possess nuclear weapons, it must have a level of denial capability that willallow it to withstand intimidation by surrounding countries.
active role in resolving strategic issues.

This could have Japan play a more

Here Japan can find strategic benefit in having offensive

defense in addition to BMD capability.

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2)

Significance from the Military Point of View

Japan is directly exposed to the threat of North Korean ballistic missiles.

Depending on future

developments on the Korean Peninsula, such threats could suddenly and rapidly grow.
take a long time for BMD capabilities to reach a level of neutralizing such threats.

It will

Considering

this situation, offensive defense measures against enemy missile launch sites is the only effective
response, at least for the moment.
As stated before, the principle of Japan’s defense policies has been exclusively defense-oriented.
But from a purely military rationale, it is preferable to destroy an enemy’s capability before taking
damage and casualties.
cost-effective.

A posture of waiting for attacks is clearly a worst option, and the least

If an enemy has clearly expressed the intention to attack Japan and begun

preparations for ballistic missile launches, the best and most effective defense is to attack thosemissile launch sites before enemy operations can materialize.
Even after the first wave of missiles have been launched, attacks on launch sites to prevent
subsequent missile attacks would be effective to minimize damage and make BMD operations
more effective.

It is also noteworthy that advances in military technologies such as precision

guided weapons have made it possible to attack specific military targets, such as ballistic missile
launch sites, while minimizing collateral damage.
5.

Issues concerning Japan’s Offensive Defense Measures

1)

Issues related to International Law

Among the issues Japan needs to address in introducing offensive defense measures is legitimacy
under international law.

The following paragraphs consider the implications of legal concerns ineach step of exercising offensive defense measures.
a. Counter Attacks
Counter attacks on the sources of hostile actions is clearly within the exercise of self-defense rightunder international law.

Hardly any other country questions the exercise of offensive operations

for counter-attacks as part of its defense policy.

In Japan, however, this has been an issue for its

exclusively defense-oriented policy partly because of restraint on actions in enemy territory, which
Japan has imposed on itself.

Discussion in Japan has thus been far remote from common sense,

let alone concepts of international law.
b. Preemptive Attacks
Preemptive attacks are those made upon clear evidence of imminent attack from an enemy.
Under international law, if there is a clear evidence of imminent attack such as statements ofintent and preparation for such attacks, preemptive attacks are permissible as a part of－149－

self-defense inherent in the rights of a sovereign nation.
In recent years, there has been much discussion on the concept of preemptive actions contained in
the US National Security Strategy (NSS) in September 2002.

NSS clearly states that the US willtake preemptive actions to prevent hostile actions such as the use of WMD by international
terrorist groups or rogue states.13

Such actions described in the NSS have been considered to be“preventive attack” (see below).

The Bush Administration seems to have redefined such actions

as an exercise of self-defense: a rogue state or terrorist group may use WMD and/or missiles
without warning, so the very situation of their possession of WMD is considered a threat justifying
the exercise of self-defense.

The Bush administration’s position has drawn criticism from othercountries not only on points of international law but also as an expression of the US unilateralism.
One must note that the interpretation of “preemptive attacks” by the Japanese Government
described above (actions in response to clear intent and preparation for hostile action) differs fromthe interpretation of “preemptive actions” given by the Bush Administration.
c. Preventive Attacks
Preventive attack can be defined as an attack before a threat becomes apparent; that is, on acountry that does not pose an imminent threat, but could develop into an unacceptable threat ifleft alone.

The UN Charter only allows preventive attacks against former enemies of allied

nations during the World WarⅡ (Japan, Germany, Itary, Romania, Bulgaria, Hungary, andFinland) under the article on former enemies—obviously this article is out of date and must be
removed as soon as possible. As it is extremely difficult to distinguish preventive attacks fromaggression, such actions are not generally allowed under international law.
A typical case of preventive attack was Israel’s strike on Iraq’s Osirak nuclear power plant in 1981.
Israel argued that the action was taken to prevent Iraq from producing nuclear weapons that
could target Israel, but the UN Security Council adopted the resolution describing the Israeli
action as a violation of the UN Charter.

Under international law, Israel’s attack on Osirak was

not considered the exercise of self-defense.
It is almost impossible to conduct preemptive operations on a WMD-armed rogue state when its
attacks are imminent because of risks involved in the use of such weapons.14

However, it isextremely difficult under the law to exercise the right of self-defense only because a country
possesses weapons when their intent to use such weapons is not apparent; even if the start of

United States of America, The National Security Strategy of the United States of America, September 2002,
p. 15.
14 Tomonori Yoshizaki “U.S. Policy on Preemption: Its Impact on International Order and Strategy,” Kokusai
Anzenhosho, Vol.31, No. 4 (March 2004), p. 8 (in Japanese) .
13

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preparation for an armed attack can be seen retroactively, it is not possible to go back as far as thetime of acquiring the weapons.15
international law.

The issue is how wide one can define “self-defense” underDepending on the purposes and result, such preventive attacks may influence

legal interpretations.

In an extremely tense situation preventative attacks may actually

influence the views of the international community. As the potential risks for WMD proliferation
increase, the conventional wisdom distinguishing preventive from preemptive attacks is becoming
more obscure, necessitating their redefinition in conformity with the present international
environment.16
2)

Issues concerning Domestic Defense Laws

Japan views offensive defense measures against an enemy’s missile launch sites as not infringing
on the Constitution, as long as the following three conditions are met; ① there is an imminent
threat; ② there is no other appropriate measure to counter it; ③ action must be limited to theminimum required.

The Japanese Government has stated that the possession of restricted power

to attack enemy missile launch sites does not violate the Constitution, unlike the case of offensive
weapons.

Therefore, it is not only permissible to attack missile launch sites as counter-attacks toprevent subsequent missile strikes, but also it is not a violation of the Constitution to implement
such attacks as an exercise of self-defense – for example, when Japan has been attacked byweapons other than ballistic missiles and it seems inevitable that ballistic missile attacks will
follow.
Furthermore, as described above, armed attacks occur from the beginning of preparations for
attack.

Whether an enemy has started to prepare for attacks will be determined after thoroughreview of the situation, the enemy’s attack capabilities, and its expressed intent.

If an enemy has

clearly expressed hostile intent and has ballistic missiles ready for launch, such action can be seen
as preparation for attacks.

Under this situation, preemptive attacks on enemy missile launchsites to limit damage from first strikes cannot be considered as a violation of the Constitution.
The problem will be when an enemy contemplates surprise attacks with ballistic missiles.

If thefirst strike is likely to involve WMD, this would strengthen motives to attack missile launch sites,
even if this is more in the scope of preventive attacks rather than preemptive attacks.

On theother hand, current interpretation of the Constitution makes it impossible to attack missile launchsites unless preparation for ballistic missile launches can be determined as intended for Japan.
Certainly it is important to collect all data on political and military conditions to help prevent
surprise attacks.17

However, given that ballistic missiles with very short flight times can easily

15 Akira Mayama, “On the Notion of Armed Attack under the United Nations Charter,” Kokusai Anzenhosho,Vol. 31, No. 4 (March 2004), p. 23 (in Japanese) .
16 Yoshizaki, “U.S. Policy on Preemption,” p. 10.
17 Comment of the Japan Defense Agency upon the response against surprise attacks (September 21, 1978).

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be used for surprise attacks, it is difficult that information collecting efforts will succeed on theirown.
Considering changes in the security environment that could lead to imminent ballistic missile
attacks, it may be necessary to review constitutional interpretations on the timing and requiredconditions on exercise of Japan’s self-defense right.

Also it should be noted that justifying

deterrence measures by suggesting the possibility of preemptive attacks will always risk becoming
a “self-fulfilling prophecy.”18

Any redefinition of required conditions for preemptive attacks mustalso retain a strict limit on the exercise of such attacks.
It is significant that discussion of attacks on missile launch sites increased in Japan following
missile launches by North Korea in July 2006.

In the future, it will be necessary to distinguish“preemptive attacks” or “counter attacks” permissible as the right of individual self-defense underinternational law from “preventive attacks” not permitted by international law.

Japan should

proceed as quickly as possible to not only secure necessary defense capabilities, but also review
conditions for their use, including the international security environment, the posture of potential
adversaries, and the characteristics of both ballistic missiles and offensive defense measures.
3)

Issue of Defense Policies

As described above, Japan does not possess offensive capabilities – whether “preemptive attacks”
or “counter-attacks” – under the exclusively defense-oriented policy as well as in consideration ofpolitical effects on surrounding countries, even though such capabilities are permissible under thecurrent international and domestic laws.
In politics, the phrase of “exclusively defense-oriented policy” expresses Japan’s determination tonever invade other countries after the World War II.

In view of military rationale, this meansthat Japan would have a “strategic defensive” posture that could have included possession of
offensive defense measures for self-defense.

However, Government statements that offensive

weapons do not conform to the spirit of the Constitution,19 and that exclusively defense-oriented
policy means defense without attacking an enemy’s bases20 have prevented Japan from possessing
weapons with offensive capabilities to attack opponent’s ballistic missile bases.

It has been

generally construed that Japan’s term of “exclusively defense-oriented policy” means to limit
military measures to Japanese territory and surrounding areas.
However, applying such restrictions risks both great damage and huge casualties to Japan, which

Yoshizaki, “U.S. Policy on Preemption,” p. 6.
Answer of Shigejiro Inou, Director-General of the Defense Agency, at the Cabinet Committee of the Houseof Representatives, March 19, 1959.
20 Answer of Prime Minister Kakuei Tanaka at the House of Representatives, October 31, 1972.
18
19

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defense policy is supposed to prevent.

In terms of military rationale, it is also preferable todestroy enemy capability prior to attack.

If an enemy has clear intent to attack Japan and suchattacks are imminent, action against the origin of hostile threats would be the most cost-effective
measure.

Such self-defense actions are clearly within the scope of “offensive defense.”

In achanging security environment, Japan needs to leave from the concept of “exclusively
defense-oriented policy” and adopt a “strategically defensive” posture including offensive defense
measures as a new basic concept.

In doing so, the Japanese Government will have to provide

thorough explanations of its intention to the international community as well as the Japanesepeople.
On the other hand, Japanese capability to attack ballistic missile launch sites could complicate
Japan-US joint operations.

If Japan and the US are to jointly conduct attacks on missile launchsites, it will be necessary to share information in real time and distribute targets appropriately.
This will certainly develop Japan-US defense cooperation further, but if there is a huge gap
between Japan and the US in terms of capabilities to attack missile launch sites, the participationof Japan in offensive defense operations could obstruct the US actions and prevent the effective
removal of ballistic missile threats.
While Japan should acquire capabilities to attack missile launch sites, doing so will takeconsiderable time and resources.

Thus for the time being it is realistic for Japan to rely on the US

and support the US offensive defense actions.

Such support may include provision of information,

in-flight refueling, and participation in air superiority operations.

In addition, if Japan acquires

a capability to attack ballistic missile launch sites, Japan and the US may share roles for suchattacks.

For example, the US forces could concentrate on inland targets including enemy

headquarters, communication centers, or underground silos, while Japanese forces conductattacks on targets closer to Japan, such as missile launch sites near the coast.
To destroy enemy missile attack capability by the first strike, Japan needs to not only possess
quantitatively and qualitatively sufficient attack forces but use them collectively.
capability will undoubtedly require great cost and time.

However, such

There is also risk of retaliatory attacks

from launchers not destroyed in first strikes, or that an adversary would have an incentive to
conduct preemptive attacks before Japan could carry out first strikes.21
If there is no realistic prospect of Japan acquiring such capabilities, it is more effective to takedefensive measures in close cooperation with the US by gradually improving existing forces, whileconsidering offensive defense measures as part of multi-layered defense capabilities along withactive defense (BMD) and passive defense (damage confinement measures).

21

Takahashi, “Coping with a Ballistic Missile Threat,” p. 116.

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Japan also needs to consider that acquisition of capability to attack missile launch sites may cause
concern among surrounding countries.

Japan’ capability to attack missile launch sites should befocused on weapons to neutralize specific military facilities, not those that would cause massive
retaliatory destruction.

However, other countries may still consider Japan’s acquisition of any

attack capability as a shift toward more offensive military posture.

When North Korea’s recent

missile launches prompted discussion in Japan on offensive defense measures, both China andSouth Korea expressed concern immediately.

However, no statements in Japan mentioned“preemptive attacks,” let alone “preemptive actions,” but only the possibility of counter-attacks.
In this sense, criticism from South Korea, which already has substantial counter-attack capability
against North Korea, is not convincing but rather seems politically motivated.
Nevertheless, action by Japan to acquire offensive defense capabilities will unavoidably draw firefrom surrounding countries.

To counter such concerns Japan needs to clarify the concept of a“strategically defensive” posture, and help develop a framework for CBMs in the region.
4)

Issues in the Development of Offensive Defense Measures

a. Existing Capability and Deficiencies
Reflecting its “exclusively defense-oriented” policy, Japan has strictly restricted to equip itself withground-attack weapons system.

Air Self-Defense Force (ASDF) weapons are mostly for air

defense missions, and are very limited in ground attack capability.

Maritime Self-Defense Force(MSDF) systems also lack ground attack capability although there is anti-ship capability.
Ground Self-Defense Force (GSDF) weapons are intended for combat within Japanese territory.
In other words, the Self-Defense Forces have had very limited capability for either ground attack
or Suppression of Enemy Air Defence (SEAD) operations, since the Guidelines for Japan-US
defense cooperation based on the Japan-US Security arrangement designate such activities to the
US Forces.
Listed below are ASDF capabilities related to attacks against enemy bases.

When Japanacquires capability to attack ballistic missile launch sites, it must consider which SDF should have(or share) such systems, depending on the characteristics of each Service.

①

Command and control capability・ Current equipment: AWACS
・ Shortfalls: target selection and planning②

Sharing of tactical capability information in real time・ Current equipment: none
・ Shortfalls: Joint Surveillance Target Attack Radar system (JSTARS), and TADIL-J (Link16)③

Reconnaissance capability－154－

・ Current equipment: RF-4 (limited in performance, collection and analysis capability)
・ Shortfalls: Stand-off reconnaissance capability, and UAV④

Electronic warfare capability・ Current equipment:YS-11EA (only with communications jamming function)
・ Shortfalls: Electronic jamming, integrated electronic warfare system⑤

SEAD capability・ Current equipment: none
・ Shortfalls: Escort jammer, and Anti-Radar Missile (ARM)⑥Ground attack capability・ Current equipment: planning to acquire Joint Direct Attack Munitions (JDAM) guided byGPS・ Shortfalls: Laser designator and targeting Pods for precision guided attacks, Laser Guided
Bomb (LGB), GPS guided air-to-ground missiles (JSOW), anti-hard target attack weapons(deep penetration bomb), and night time attack (night vision equipment)⑦

Combat Search and Rescue
・ Current equipment: U-125, CH-47
・ Shortfalls: Self-defense capabilities for search and rescue aircraft⑧

Air-to-air refueling capability・ Current equipment: planning to acquire KC-767J (delivery from 2006, operational from2008)

b. Weapons for Offensive Defense
For offensive defense measures to attack ballistic missile launch sites, possible weapons may
include:①

Ground to ground attack
・ Ballistic missiles
・ Cruise missiles②

Sea-based strike・ Cruise missiles from surface ships
・ Cruise missiles from submarines③

Air to ground attack
・ Air-launched cruise missiles
・ Air to ground attack (land and sea-based strike packages)

Japan will need to consider likely threats as well as political concerns in evaluating whenintroducing any of the above weapon systems.

For the moment, it is preferable to aim for thedevelopment of strike packages and acquisition of various cruise missiles.

In the future, Japan

may need offensive and defensive capabilities using new technologies such as High-Powered
Microwave Devices (HPMD), which disable electronic weapons and instruments instantly through－155－

Electric Magnetic Pulse (EMP) effects that can destroy laser or ballistic missile capabilities.
Especially in consideration of Japan’s political position and geographical characteristics, thecombination of cruise missiles with stand-off precision attack capability, such as Tactical
Tomahawk cruise missiles, and high performance penetration warheads from strike aircraft will
make it possible to destroy specific military targets while limiting collateral damage.
For cruise missiles, one option is to purchase conventional Tomahawk missiles from the US, butthese missiles require several hours to prepare for launch, so using them in response to imminent
ballistic missile launchings may not be effective.

Moreover, use of Tomahawk missiles will

require selection of aircraft, submarine, or surface ship platforms.

While cruise missiles have adisadvantage of not being able to return once launched, it is possible to impose strict limits on
their usage.

This enables the restriction of targets based on political reasons, and would avoid

mistaken attacks.

Furthermore, cruise missiles can be launched from a remote area, thereby

avoiding risks of friendly casualties.
On the other hand, since attacks on mountainous terrain and other areas are difficult for cruise
missile, strike packages consisting of UAVs for reconnaissance, targeting and attack operations, aswell as fighter and stealth attack aircraft would be very effective.

New capabilities such as

anti-radar missiles (ARM) and stand-off-jamming (electronic warfare aircraft) will be needed for
SEAD.

Precision guided munitions launched by aircraft can be called back even after command

to implement attacks, as long as they have not yet dropped their bombs.

These aircraft also allow

more flexible target settings, so they are especially effective for attack of mobile missile launchers.
The capability to attack ballistic missile launch sites can be added as upgrades to existing fighterand ground attack aircraft.

Such measures may lessen reactions from other countries, comparedwith newly acquired cruise missiles.

On the other hand, attacks on missile launch sites will

require that strike packages move relatively closer to targets, which are raising operational risk.
Information needed to determine whether ballistic missiles attacks against Japan are underway,
or identify missile launch sites, must be obtained instantly.

In case of Japan, major threats will

be MRBMs on mobile launchers, but it is extremely difficult to detect them and communicate
information to command and control system as well as to offensive weapons in real time.

In thecase of Scud hunting during the Gulf War, the number of launchers destroyed was quite small;many bombs hit decoys or tanker trucks.
mobile launchers.22

This certainly symbolizes the difficulty of attacking

During the Iraq War of 2003, the US Forces inflicted considerable damage on

Iraqi ballistic missiles forces, but this was under a situation of almost absolute air supremacy, and22

Ibid, p. 112.

－156－

Special Forces were active in Iraqi territory.23

To attack ballistic missile launch sites, Japanneeds to develop highly advanced information collection systems, simultaneous data link
capability, and air surveillance as well as air superiority capabilities in addition to offensive
weapons, which again will require considerable time and cost.
In this sense, the introduction of UAVs linked to satellites for precision surveillance, targeting,guidance, and attacks as well as the introduction of HPMD will provide broader options inoffensive defense measures, especially against ballistic missiles on mobile launchers.

23

Ibid, pp. 113-115.

－157－

Chapter 11

Passive Defense Measures

1.

Passive Defense and Trends in Japan1)

Purposes and Significance of Passive Defense

Passive Defense is “[m]easures taken to reduce the probability of and to minimize the effects ofdamage caused by hostile action without the intention of taking the initiative.”1

Based on suchdefinition, possible measures of passive defense include activities to protect people and respond todamage, reinforcement of facilities and buildings, securing of alternate infrastructure, response
capabilities against CBRNE (Chemical, Biological, Radioactive, Nuclear and Explosive) weapons,
and maintenance of military capabilities.2
The purposes of passive defense are, in the aspect of protecting people, the minimization andconfinement of damages to lives and assets, and the maintenance of infrastructure needed forsurvival and administrative functions.

In view of military operations, the objectives are to

maintain continued operations and services even under severe conditions of degraded capabilities
or a CBR (chemical, biological, or radioactive) weapons environment.

In this chapter, passive

defense as a response to ballistic missiles will be discussed mostly in view of protecting people(civilians).
Technologies to intercept ballistic missiles have advanced significantly, yet the technologies ofballistic missiles themselves advance day by day as well.

Attacking missile launch sites(offensive defense) or intercepting incoming missiles (active defense) may be effective measures,
but considering the technological gaps and budget restrictions, there is no guarantee that suchmeasures can completely defend Japan.

That is why the passive defense is important.

By

combining and balancing the capabilities of offensive defense, active defense, and passive defense,a truly effective response against ballistic missile attacks with the most efficient distribution of
resources will become possible.
Passive defense not only reduces damage to lives and assets, but also can relieve anxieties, thereby
providing both physical and psychological effects. In addition, passive defense is most closely
linked to the activities of people, so that their participation will raise their willingness to confront
the threat of ballistic missiles.

Passive defense is also an essential element from a military

perspective; that is, protection of defense power in the case of successive ballistic missile attacks
that lead to actual invasion.

Department of Defense Dictionary of Military and Associated Terms, Joint Publication 1-02, 12 April 2001
(As Amended Through 14 April 2006), p. 403.
2 In the US, the term “Consequence Management” is “[a]ctions taken to maintain or restore essential services
and manage and mitigate problems resulting from disasters and catastrophes, including natural, manmade,or terrorist incidents.” Although the threats described are different, it can be construed as a synonym forpassive defense. For the definition of consequence management, ibid., p. 113.
1

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During the Gulf War of 1991, Israel demonstrated how passive defense effectively functioned
against ballistic missile attacks.
situation.

Iraq launched 39 Scud missiles against Israel to complicate the

The US asked Israel to refrain from counter-attacks, and, at the same time, deployed

Patriot PAC-2 batteries there. After the start of the Gulf War, the US tried to destroy Iraqi
ballistic missile launchers, and Israel distributed gas masks to Israeli citizens with training on
their use to prepare for possible use of chemical warheads.

They also helped prepare provisionstorage and sealed rooms for family shelters.
Since Iraqi ballistic missiles had poor accuracy, Israel issued warnings upon the launch of missiles
to place all Israel on alert.

Following missile strikes, civil defense units fought fires, conductedrescues and provided other relief. All ballistic missiles Iraq used had conventional warheads, andwith effective passive defense Israel was able to minimize casualties to two dead and 226 wounded
despite the fact that missiles damaged over 6000 homes and 1300 other buildings.

Confinementof damage was a major element in restraining Israeli counter-attacks.3
2)

Development of a System to Protect People in Japan

Nuclear and ballistic missile issues of North Korea, 9/11 terrorist attacks on the US, and thechanging security environment in Northeast Asia have increased Japanese interest in emergency
defense legislation. As a result, Japan established the Armed Attack Situation Response Law,
the basic legislation for responses to situations (emergency legislation), in June 2003.

This wasfollowed in June 2004 by a “Law Concerning the Measures for Protection of the Civilian
Population in Armed Attack Situation” (hereinafter referred as Civil Protection Law).

This Law

stipulates the responsibilities of national and local governments and other public sectors tominimize the effects of such attacks, and damage control as well as evacuation and relief
measures.
Based on the Civil Protection Law, the Japanese government developed a Basic Guidelines forProtection of the People (Basic Guidelines) in March 2005.

This Guidelines list measures on theprotection of people, including evacuation, relief, and response to armed attacks disaster.

The

Basic Guidelines classifies four types of armed attack situations, including ballistic missile attacks.
The Cabinet Office also prepared a safety manual, “Protecting Ourselves against Armed Attacks
and Terrorism.”
On ballistic missile attacks, the Basic Guidelines note the extreme difficulty of identifying targets
upon missile launches as well as the very brief flight times of these missiles, thus emphasizing theSee Kunihiko Kida, “Gulf War and Missile Defense: What Israeli did at that time,” Securitarian, November
1998 [http://www.bk.dfma.or.jp/~sec/1998/11/kida.htm] (in Japanese) .
3

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importance of confining damage through quick communication, and evacuating mainly indoor
areas, and taking into consideration of NBC attacks.
Local governments and public sectors are developing their own civil protection plans based on the
Basic Guidelines.

In February 2005, the Fire and Disaster Management Agency published amodel civil protection plan for local governments.

Based on this model, 47 prefectures completed

their civil protection plans by the end of FY2005.

During FY2006, cities and towns have beendeveloping their civil protection plans and evacuation instructions.
Joint exercises between national and local governments have been conducted with Saitama,
Toyama, Tottori, and Saga prefectures.

These exercises featured desk plan training on theassumption of simultaneous terrorist attacks.

In November 2005, Fukui Prefecture and thetowns of Mihama and Tsuruga City conducted exercise with an assumed terrorist attack on the
Mihama Nuclear Power Plant.

Desk plan exercises and actual trainings were conducted among

many other local governments in 2006.
As seen here, the Japanese system to protect people is being gradually but steadily developed.
However, in responding to ballistic missile attacks, Japan seems to focus more on active defense(BMD) or offensive defense; interest in passive defense still remains on a lower level.

Even at thetime of North Korea’s missile launches in July 2006, the Fire and Disaster Management Agency
sent information obtained from the Cabinet Office to prefectures concerned around 6:30 am, about
three hours after the first missiles were launched.

Although there was not much possibility thatthe missiles would hit Japan, this highlighted a problem in the communication of information.
There are many books published on BMD but only few describe passive defense, keeping theawareness of the general public at a low level.
2.

Measures of Passive Defense against Ballistic Missiles Attacks

Measures of passive defense vary, but can be classified mainly as follows:・

Reducing Vulnerability

・Providing Warning・

Facilitating Recovery and Reconstitution

The following sections describe Japan’s situation and measures of passive defense, particularly
against ballistic missile attacks.
1)

Reducing Vulnerability

Reducing vulnerability serves to ensure that lives, assets and facilities survive ballistic missile
attacks, minimize casualties and damage, and maintain critical infrastructure.
need to be implemented systematically before threats materialize.

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Such measures

Reducing vulnerability measures also help to avoid ballistic missile attacks through concealing
target locations.

Targeting plays an important role in preparations for ballistic missile attacks.

Major targets are usually those at a national “center of gravity” such as key defense facilities,
communication centers, core political, administrative and economic functions, nuclear power
plants, and other critical infrastructure. Effective implementation of measures to reduce thevulnerability of such key facilities could lower the likelihood of their being targeted for attack andcertainly reduce damage if attacked.
a. Reinforcement of Key Facilities
This is literally the strengthening of facilities to reduce damage when hit by ballistic missiles or by
their components and debris.

Construction standards in Japan mainly address resistance toearthquakes, but have not considered external impacts such as those from ballistic missiles.
Certainly it is not practical, in terms of cost-effectiveness, to reinforce ordinary homes andadministrative buildings against ballistic missile attacks.

Reinforcement work would focus on

lifeline-related facilities such as electricity, gas, water and communications; national and local
government organizations for information collection and decision-making (including major local
SDF headquarters); and nuclear power plants.
b. Deconcentration of Key Functions
Concentration of administrative, financial, and commercial functions is convenient and efficient
for routine activities, but increases the risk of serious damage when targeted for attack.
Therefore, central and local governments need to avoid to the extent possible concentration ofadministrative functions and lifeline infrastructure to minimize damage from ballistic missile
attack.
c. Measures against WMD Attacks
Response to attacks by WMD-armed ballistic missiles requires expert knowledge and specified
equipment to be delivered within a very short time.

In Japan, the sarin attacks on Tokyo

subways and 9/11 terrorist attacks in the US led to gradual preparations against biological andchemical weapons use by terrorists and other groups, but these efforts are not yet sufficient.

It isnecessary to quickly mobilize initial response by establishment of evacuation sites and periodic
exercises to prepare for WMD attacks, while building stocks of vaccines, neutralizers, anddecontamination agents.
d. Securing Redundancy and Robustness
As demonstrated in the case of huge earthquakes, recovery of lifeline facilities takes a long time;
the longer it takes, the less motivation people have reconstruct their lives.

Many key facilities inJapan are increasingly interdependent, so any failure in one will likely cause a cascading effect of－161－dysfunction and broadened damage that will impact political, economic, and security systems, aswell as health and welfare measures, and thus undermine trust in government.4

Strengthening

the redundancy and robustness of key infrastructure will not only ensure survival in the face ofballistic missile attacks, but also encourage public willingness to respond, which will enable quick
and appropriate actions by the Japanese Government.
When there is no awareness of imminent threats, it will not be easy to gain understanding of theneed to secure key infrastructure through sacrificing efficiency and economy. At present, there isno national policy to maintain the functions of cities and regions in the face of armed attacks.

Onthe other hand, such measures against attacks, including ballistic missile strikes or terrorist
attacks, would also contribute to quick recovery from natural disasters such as earthquakes.
2)

Providing Warning

a. Information Collection, Detection of Launches, and Issuance of Warning
One of the necessities of passive defense is quick warning upon detecting signs of ballistic missile
launch, and rapid communication of such information to relevant ministries and agencies as wellas the general public.

During the Gulf War in 1991 Israeli warning systems did not function

effectively during the first phase of Iraqi missiles attacks; warnings were issued after the missiles
had hit.

US support allowed about 5 minutes warning, so people could reach shelters and hadtime to help the elderly and children with gas masks.5

Early warning is the most effective

measure to confine damage, but mistaken warnings could result in unnecessary actions, and evencause panic.
Note the flow of warning notices; warning of imminent ballistic missile launch is broadcasted to
the general public through TV and radio.

Warnings of actual launches would be issued for eachlaunch with sirens and similar measures where missiles are expected to hit.6

Information forballistic missile launch warnings would be provided by collection and analysis of information fromearly warning sensors.

FPS-XX, X-band radar, or SPY-1 radar are mutually complimentary intheir features, and enable the early identification of incoming ballistic missiles and expected
impact areas, thereby contributing greatly to the early issuance of warnings.

On the other hand,to detect signs of ballistic missiles launching and launches immediately afterward, it is also
necessary to gather human intelligence information (HUMINT) in advance, as well as electronic
and communication intelligence (ELINT/COMMINT) from reconnaissance satellites.
respect, Japan’s past measures were unfortunately insufficient.

In thisAs noted earlier, Japan needs toconsider developing its own satellite capability, in addition to information exchanges with the US.
United States of America, The National Strategy for the Physical Protection of Critical Infrastructures and
Key Assets, February 2003, p. 81.
4

See Kida, “Gulf War and Missile Defense.”
Cabinet Secretariat, “Protecting Ourselves against Armed Attacks and Terrorism,”” September 2005, p. 6.
(in Japanese)

5
6

－162－

b. From Issuance of Warnings to Instructions for Evacuation
According to the Basic Guidelines to protect citizens, information on ballistic missile launches is tobe reported to the Prime Minister’s Office as soon as possible, distributed to relevant ministries,
agencies, and organizations through the Cabinet Office, and conveyed to municipal governments
through prefectural offices, then to the public.

Japan is also preparing to establish a Civil

Protection Warning Siren (J-Alert) to send alert requiring immediate response, such as warningsof tsunamis, severe weather, and armed attacks.

The Fire Defense Agency would issue J-Alerts

to the disaster prevention wireless systems of municipal governments through a satellite
communication network, so to alert to all residents simultaneously.

The J-Alert system to beinstalled from 2007 has a proven capability to send information from the Fire Defense Agency
through wireless systems within 6.25 seconds.7
On the other hand, there are some issues that need to be addressed; for example, how to ensure
the immediacy and credibility of an alert system, or the most appropriate alert procedures (setting
criteria for warning issuance, the flow of warning information, or how to keep residents informed).
It is essential to inform the people what warning sirens mean.8

Other issues to be clarified are

who shall responsible for issuing warnings or evacuation instructions, and how such decisions areto be made and implemented.

Moreover, Japan needs to determine clear standards for measuring

immediacy and accuracy that take into account reactions to the issuing of warnings.
During the North Korean missile launches in July 2006, it took up to several hours for central
government warnings to reach local governments and other locations.

It is fortunate that themissiles did not impact Japanese territory, and the delayed communication did not result indisaster.

But, based on the lessons learned from this incident, it is necessary to develop an

instant alert system as soon as possible.

Of course, responsibilities for issuing the alert should beclearly defined, including protection of intelligence information and judgment on the timing ofalert issuance.
c. From Instructions for Evacuation to Evacuation Guidance
Measures to be taken from alert issuance until missile impacts include evacuation of people fromthreatened areas by police, firefighters and the SDF.

However, there are not many people who

understand evacuation procedures in case of ballistic missile attacks.

Even the SDF, police,

firefighters and local government staff are not well aware of or trained in protection and relief
activities, as well as procedures to request support.

7

Mainichi Shimbun, July 12, 2006.

Sample sound of a siren can be heard at the Cabinet Secretariat Website
pc-index.html].
8

－163－

[http://www.kokuminhogo. go.jp/

Response to ballistic missiles is different from measures dealing with other types of armed attacks
because of extremely short warning time as well as the possibility of exposure to WMD.

Response

measures, including development of appropriate procedures and training with people, must also
conform to local characteristics of the targeted areas.
3)

Facilitating Recovery and Reconstitution

If interception by active defense (BMD) fails to prevent missile strikes, prefectural governments
would implement measures to evacuate residents, rescue and treat victims, confine damage (fire,building collapse, spread of diseases, etc.), and restore facilities and equipment.

Such measureswould be based on the Basic Guidelines and the civil protection plans developed by governmentorganizations and local communities.

If damage and casualties do not exceed the range ofordinary disasters, response measures will likely follow those similar for large earthquakes, so
local governments could use plans for natural disasters developed from past experience.

However,

for attacks involving WMD, support by the SDF and Fire Agency personnel with expert knowledge
and skills would become critical.

For areas contaminated by WMD, decontamination would beneeded in addition to existing plans.
3.

Policies Japan Needs to Take

1)

Comprehensive Strategy and the Promotion of Measures

The objective of passive defense cannot be achieved by the efforts of the Ministry of Defense, theSDF, police, and firefighters alone.

National and local governments as well as other public

sectors must unify their efforts to implement planned and coordinated measures at every stage ofthe emergency.
In the US, the Missile Defense Agency (MDA) and the Department of Homeland Security (DHS)
promote measures for missile defense and consequence management as their major tasks.

Japan,

on the other hand, has developed policies like the Basic Guidelines on how to protect people, butgovernment agencies tend to address the issue as a mere additional duty.

Even at the level ofnational government, the importance of passive defense can hardly be described as fully
understood.

A new organization established under the Cabinet Office or the Ministry of Defense

should develop and implement a comprehensive strategy.
a. Completion of Civil Protection Plans
The Basic Guidelines on the protection of people prepared by the national government and civil
protection plans prepared by local governments are limited to basic plans, and lack details of
measures for ballistic missile attacks.

These plans are to be tested through training andexercises, and modeling and simulations (M&S), and revised accordingly.

Procedures fromissuing of alerts to evacuation guidance must verify the effectiveness of information flow between
various ministries and agencies.

According to the Basic Guidelines, a headquarters for－164－emergency response at the national government level is established, which is to coordinate efforts
between national agencies and local governments. The government should provide comprehensive
training on response to emergencies to check for any lack of smoothness in coordination within theheadquarters, as well as between ministries and agencies.
b. Cooperation with US Forces
Cooperation with US Forces include not only active defense and information sharing, but also
required cooperation in rescue, medical services, restoring facilities and equipment, and protection
against WMD.

Japan needs to develop joint program for strengthening of cooperation with the

US and improve mutually complimentary capabilities.

US Forces stationed in Japan and the

SDF are said to be studying such activities but further review, including legislative issues, will beneeded on activities of US Forces in Japan, or, in turn, Japan’s support for any damages inflicted
on US bases.

It will also be important to coordinate with the US State Department, which isprimarily responsible for matters concerning US personnel or other citizens outside the US.
c. Development of Long Term City Planning, and Review of Capital City Functions
Japan should gradually develop the redundancy and robustness of its lifeline infrastructure, as
well as facilities and preparedness to enable timely decision-making and response activities
throughout the duration of emergencies.
2)

Development of Public AwarenessThe passive defense explained above includes reduction of damage through issuance of alerts,
evacuation guidance, rescue activities, recovery from damages, and broader measures for reducing
vulnerability.

Implementation of passive defense will inevitably affect the lives of people, so itcannot be done without public understanding.

Unfortunately, compared to active defense

measures such as BMD, the Japanese public has a lower level of awareness on the need for passive
defense.

The Civil Protection Law does not make cooperation on safety measures mandatory, but

is left to the voluntary will of the public.
Again, response against ballistic missile attacks requires the appropriate combination of offensive
defense, active defense, and passive defense.

Passive defense, in particular, is closely related tothe daily activities of people, so it is essential that they understand its importance and can thencooperate its activities.

For this purpose, the Japanese Government needs to explain theimportance of passive defense through such activities as providing analyses of damage frommissile strikes and debris using M&S studies.

Other important activities will be periodic

training and exercises based on civil protection plans, and establishment of a civil defense teams
located in each region.
3)

Defense Capability against Weapons of Mass Destruction－165－

Since ballistic missiles can be armed with WMD warheads, it is imperative to reinforce defense
capabilities against WMD.
resolve.

Yet, the kind and level of capabilities needed are not easy issues to

At present, Japan has only limited capabilities to defend against the WMD. In

addressing this problem, the following capabilities should be maintained as a minimum level of
response:① Defense and sheltering— preventing and reducing contamination/exposure to WMD;
② Detection and notification— detecting and measuring contamination from WMD, and making
timely notifications;③ Maintaining key functions—a decontaminating, quickly implementing recoveries throughmedical services, and restoring functions; and④ Conducting activities under CBR environment—continuing services and activities, especially,
police, and firefighting operations, in a WMD-contaminated environment.
4)

Development of Deficient Functions

Deficiencies in passive defense measures such as those listed below need to be corrected:① Capabilities of organizations, such as the SDF, police and firefighters, whichmust operate in

impacted areas before and after ballistic missiles attacks, to protect themselves against WMD;
② Building stocks of equipment and supplies required for medical services and decontamination
activities in case of WMD attacks;③ Operation of early warning satellites to reinforce information collection and initial response
capabilities; and④ Protection of the SDF units and bases with capabilities for active defense, especially the
C2BMC functions.

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Chapter 12
1.

Defense Industrial/Technology BaseJapan’s Defense Industry and its Technology Base

Many reports have discussed the situation of Japanese defense companies in regard to theirtechnology base. 1

Financial difficulties have constrained Japan’s defense budget, forcing

reductions in procurement and R&D funding.

Procurement budgets have contracted to about 830

billion Yen in 2006 from about 1 trillion Yen in 1995.

Since Ministry of Defense orders many

types of defense equipment, contractors need to maintain production lines that can accommodate
various items.

However, due to the Japan’s “Three Principles on Arms Export”— not to license

the export of arms ① to communist countries, ② to UN Security Council arms embargocountries, and ③ to countries involved in or likely to be involved in international conflicts—andits strict application—① not to license the export of arms to the countries or regions restricted in
the Three Principles, ② to refrain from the arms export to other areas not included in the Three
Principles in conformity with the spirit of the Japanese Constitution and Foreign Exchange andForeign Trade Law, and ③ also to treat the equipment for arms production in the same category
as arms —Japanese companies cannot expect to export such products but must rely solely on
MOD(former JDA) orders.

This obviously reduces production rate and cost-effectiveness, thusincreasing the expense of domestically produced defense equipment.
Budget cuts mean further decreases in procurements.

With reduced operating rates andincreased production costs, defense companies have difficulty keeping production lines open andengineers employed.

“In defense departments of Japan’s companies, over 70% of manufacturing

facilities and over 80% of engineers and technicians are tasked solely for defense equipment
production.

As the production of defense equipment requires special technologies and production

processes, there are many regulations and restrictions applicable to such production.”2The

maintenance of a defense industrial/technology base has been a big burden for defense relatedcompanies in Japan.

With reduced orders, the defense departments become less important inthese companies and some companies are withdrawing from defense production. As mentioned
above, defense production requires special technologies and facilities, so once a production
foundation is lost, it takes many years and tremendous expense to recover.

In Japan, almost all

See, for example, Research Committee on Defense Industrial/Technology Base, “Basic Direction on the
Maintenance and Development of the Defense Industry and Its Technology Base: Toward the Development ofa Foundation for 21st Century,” November 2000 (in Japanese); Japan-US Industry Forum for Security
Cooperation, “Joint Statement of the Japan-US Industry Forum for Security Cooperation: Interests of
Defense Industries in Japan and the US,” December 2002; Nippon Keidanren, “Future Development of
Defense Power: Toward Strengthening Defense Equipment Production and Technology Base,” July 20, 2004
[http://www.keidanren.or.jp/japanese/policy/2004/063.html] (in Japanese); Japan Defense Agency, “Report of
the Meeting on Security and Defense: Vision for Future Security and Defense,” October 2004 (in Japanese);
Meetings on Strategy to Procure Defense Equipment, “Toward the Procurement of Equipment for a New Age:
Establishing the Technology Base Truly Needed Defense Production,” June 2005 (in Japanese).
2 Meetings on Strategy to Procure Defense Equipment, “Toward the Procurement of Equipment for a New
Age,” p.20.
1

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defense technologies reside within these contractors.

If the weakening of defense companies andtheir technology base continues it will become difficult to respond to emergencies.
In addition, Japan has another problem in that the public and private sectors do not share anawareness of the need to jointly develop and produce equipment on an equal basis.

There is astrong hierarchy in which the public sector has superiority and never takes risks in development,
while the private sector submissively accedes to such hierarchy.3

To be specific, development

work always carries risk, which may be a factor in changing manufacturing costs.

In case ofdefense industries in Japan, the private sector bears increased costs, while any cost savings must
be returned to the public sector.

The application of such “excess profit returns to purchaser” rule

results in the public sector bearing no risks.
Excessive interference from the public sector discourages competition and consolidation among
defense industry companies, thereby leading to higher priced equipment, less progress intechnological innovation, and ultimately lowered competitive power. In reality, the role of the
public sector is to develop defense capability and ensure its effective operation, while the goal of
the private sector is to attain profits.

Therefore, serious dialogue between public and private

sectors must be maintained to enable the pursuit of both sectors’ purposes.
In Europe and the US, there are many cases where equipment is studied, developed and producedwith other countries bilaterally or even multilaterally.

Such joint efforts narrow gaps in defense

technologies, improve efficiency in budgeting by concentrating on priority areas and avoiding
overlapping investments, maintain defense industrial/technology bases of allied and friendly
countries as well as domestic one, and strengthen interoperability among allies.4

However, incase of Japan restrictions imposed by the Three Principles of arms export have curtailed
participation in international programs.
The basic concept of the Three Principles on Arms Export is not to exacerbate international
conflicts.

However, excessively restrictive application of the Principles has been not only abarrier to Japan-US cooperation on defense equipment, but prevents Japan from providing
equipment, materials, and technologies that can benefit the international peace and stability.

As

noted above, sole procurement by the Government of Japan makes the production costs of defense
equipment much higher than those of other countries.

In the case of joint development projects

like the FSX support fighter, no components could be exported to the US but used only in Japan,

Akio Shono, “Issues on Acquiring Equipments,” DRC Annual Report 2004, 2004 [http://www.drc-jpn.org/
AR-8/shohno-04j.htm] (in Japanese).
4 See Masahiro Shigemura, “Proposal for Health of Japanese Defense Industries,” DRC Annual Report 2003,
2003 [http://www.drc-jpn.org/AR-7J/shigemura-03j.htm] (in Japanese); Masahiro Shigemura, “Security
Policies in International Equipment Cooperation,” JFSS Quarterly Report, Japan Strategy Study Forum,
Suring 2005 [http://www.jfss.gr.jp/jp/zuisou_35j.html] (in Japanese).
3

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thereby leading to higher prices.5

As discussed below, the application of the Three Principles on

Arms Export has been modified for joint BMD projects, but many issues remain for the defense
industry and its technology base as a whole.
As for defense industrial cooperation between Japan and the US, there are also many restrictions.
The Japan-US Industry Forum for Security Cooperation pointed out the following problems:“Industry dialogue can only be as effective as governments permit through their laws,
policies, and regulations. Unfortunately, government practices still reflect the conditionsof earlier times, restricting industry dialogue to a level well short of that needed forenlightened US-Japan cooperation on defense programs.

US companies must go

through elaborate "marketing license" procedures before they can even discuss theconcepts underlying potential cooperative programs with Japanese counterparts.
Japanese companies are not authorized by their government to undertake studies with
US industry that are not part of established government programs.

This combination of

government policies and procedures actively discourages US and Japanese industry fromeven exploring possibilities for cooperation. ”6As seen here, Japan is left out of the current trend of joint projects among developed countries, andthere are concerns that lack of participation in activities may adversely affect the technology leveland production costs of defense equipment, and ultimately the overall security of Japan.7

Given

the current trend of severely restricting the transfer of most advanced technologies underlicensing agreements, Japan finds it more difficult to have access to such advanced technologies.
In other words, the Japanese defense industry and its technology base face more severe conditions
than ever.
2.

BMD and the Defense Industrial/Technology Base

Ballistic missile defense is one of the highest priorities Japan’s national security and its defense
policies as well as budget.

BMD also has significant implications for Japan’s defense

industrial/technology base and can become a driving force for fundamental reforms.

On the other

hand, there are many issues that Japan needs to address, as described below.
1)

Restrictions on Japan’s Defense Budget

Ballistic missile defense requires the acquisition and support of various equipment, including
weapons such as interceptors and their platforms, sensors like radar, Command and Control,
Masahiro Shigemura, “The Alleviation of the Arms Export Ban Policy and International Armament
Cooperation,” DRC Annual Report 2003, 2003, [http://www.drc-jpn.org/AR-8/shigemura-04j.htm] (inJapanese).
6 Japan-US Industry Forum for Security Cooperation, “Joint Statement.”
7 Nippon Keidanren, “Future Development of Defense Power.”
5

－169－

Battle Management and Communications (C2BMC) systems and support equipment, all of whichhave very advanced and costly capabilities.8

Since FY 2004 when BMD acquisition was firstbudgeted, BMD has exceeded 10% of all JDA(now Ministry of Defense) procurement expenses foreach fiscal year.
The National Defense Program Guideline (NDPG) revised in 2004 stated that Japan will develop
capabilities for immediate responsiveness, mobility, flexibility and multi-role functions, supported
by highly advanced technologies.

However, current financial restrictions allow hardly any

increase in defense budgets, and with the considerable funds allocated to BMD, it becomesincreasingly difficult to procure equipment that can provide multi-functional, flexible and practicaldefense power. Moreover, the burden of two to three trillion yen that Japan is to bear for therealignment of US Forces in Japan may further impact budget allocations.

Thus Ministry of

Defense is reviewing its current Mid-term Defense Program (2005-2009), and considering further
compression of the defense budget as a whole.
Given this situation, many factors could undermine the defense industrial/technology base as awhole, and impact unfavorably on industrial resources related to BMD.

The North Korean

missile launches of July 2006 will inevitably advance BMD development, but Japan faces threatsother than ballistic missiles that require the development of various defense equipments.
Therefore, depending on the security environment around Japan, the focus of defense spending
may shift to “multifunctional, flexible and effective” capabilities rather than BMD.

If there is no

increase in defense budgets and expenses to support the realignment of US Forces in Japan
increase, then the BMD budget may be reduced, further delaying the development of BMD
systems.

The industrial/technology base related to BMD could weaken rather than strengthen,even if this is a capability Japan must maintain for the future.
2)

Joint Operations and Ballistic Missile Defense (BMD)

C2BMC is the core of BMD, supporting prompt and efficient operations of a Joint Task Force.

For

BMD operations, it is necessary to collect, process and analyze all information received fromvarious sensors, determine which interceptor missiles to use, and make decisions on launches inaccordance with emergency response procedures.

Considering that medium-range ballistic

missiles (MRBM) can reach Japan within 10 minutes, decision-making processes should be
automated as much as possible.

Moreover, BMD systems require real-time communication

among component systems, so that further research and development effort in information
technology is essential, including satellite communication and data links. The development of
Tactical Data System (TDS) infrastructure to enable interoperability among the three

Akio Shono, “How to Proceed with Defense Industries Policies,” DRC Annual Report 2003, 2003
[http://www.drc-jpn.org/AR-7J/syouno-03j.htm] (in Japanese).

8

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Self-Defense Forces (SDF) must be addressed immediately.
BMD systems consist of many subsystems and components, linked by systems integration
techniques that optimize the capability of each component and coordinate their functions tomaximize total capability.

Such performance can be obtained only when sufficient know-how andexperience in know-why accumulate through pursuing the best combinations of element
technologies, so it is essential to have continuity in development experience.9
Technologies for sensors, C2BMC, communication infrastructure, and system integration that
constitute BMD systems build on spin-offs from private sector technologies, so the pace of theirdevelopment is quite fast.

Incorporation and updates of such technologies will greatly contributeto BMD system capabilities.

These technologies can also be applied to measures other than BMD,

such as damage control from ballistic missile attacks or attacks on missile launch sites.

Under

the traditional acquisition process, each SDF Service developed its equipment plan, budget
request, and maintenance provisions.

However, Japan needs to develop a defense program basedon integrated operation of three SDF Services.

Their integration will be enabled by developing

processes for the acquisition of integrated equipment, storage of resources, development andmaintenance of production and technology bases, and accelerated procurement of priority
capabilities.10
3)Technological Gaps between Japan and the US

The US has an overwhelming advantage in BMD-related technology and test capability overJapan and other countries, as it has invested tremendous amounts of money since the Cold War.
While BMD systems consist of many components (system of systems), Japan could participate only
in development of the four missile components in the Joint Technology Research on Navy Theater
Wide Defense (NTWD).

Among the reasons why Joint Technology Research did not involve othermatters was the fact of considerable technological gaps between Japan and the US in the fields ofsystem integration and the core system of C2BMC, so that the US was rather reluctant to releasetechnological data in these areas.
“To use a broad range of technologies that fully utilizes the most advanced resources ofcounterparts in joint research and development, it is necessary to bring our own technologies asbargaining power.”11

If the technological gap is too great, Japan cannot expect the US to provide

technology support and bear financial burdens alone. As a result, imports from the US may
Research Committee on Defense Industrial/Technology Base, “Basic Direction on the Maintenance andDevelopment of the Defense Industry and Its Technology Base,” p.20.
10 Akio Shono, “Defense Policies on the Procurement of Equipment,” DRC Annual Report 2005, 2005, p.64.
11 Research Committee on Defense Industrial/Technology Base, “Basic Direction on the Maintenance andDevelopment of the Defense Industry and Its Technology Base,” p.12.
9

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increase.

Given limited defense budgets, having considerable funds flow to the US means thatJapan’s defense industrial/technology base will have a smaller “piece of the pie,” thereby further
weakening it and expanding the technological gap between Japan and the US.

This trend could

further increase imports from the US, leading to a vicious spiral in the procurement of equipment.
The fact that Japan cannot implement BMD tests domestically further opens its technological gap
with the US.

Without tests using actual BMD systems, it is difficult to obtain sufficientperformance data. Unless such data can be built-up domestically, it is not possible to obtainsufficient design information to improve imported systems and design next generation
replacements, thereby further increasing dependency on the US.
Since SDI, the US has invested over 20 trillion Yen on missile defense, while Japan has juststarted an investment of only one twentieth that amounts.

Considering this fact, it may bedifficult to narrow the technology gap between two countries, but public and private sector
interests should share recognition of this gap, and make efforts to reduce it on BMD systems.
Japan’s dependence on the US for much of the development, production, and improvement work on
its BMD system makes it extremely difficult to obtain self-sufficiency.

For Japanese BMD items

developed by the US, the following problems could raise:・ The time would be needed to implement transfers from the US;・ Although the system is continuously updated in the US, Japan may end up with an older
version that is not updated;
・ “Black boxes” in the system prevent complete test, evaluation, and maintenance work inJapan, and maintenance may be time-consuming;
・ Due to conditions in the US, a ‘final buy’ may be required at an early stage of acquisition,
so Japan (especially industry) may need to hold considerable inventory;・ In any emergency, the US situation will always be given priority over Japan, so exports
could be delayed, or even blocked.
To resolve these issues, Japan needs to argue at every opportunity that Japan’s BMD capability
serves the US interests.

The Japanese Government and defense industries should also makeefforts to address disadvantages in technological capabilities.
Development of systems with the involvement of the US, such as BMD, raises other concerns as
well:
・ Japan may not obtain all data needed for system design (such as threats and interception
requirement), so the system will be designed on what could be doubtful assumptions;・ Japan cannot test a complete system in its territory, unlike the US which has large andadvanced facilities in the South Pacific to acquire data on the launch and interception of－172－

ballistic missiles.

To build a facility with same capabilities would be extremely difficult

for Japan, so even if Japan could develop a system without the cooperation of the US, it
would still need the US support for the acquisition of analytical data.
It may not be practical for Japan to aim for self-sufficiency in BMD system development, but
Japan should promote indigenous BMD efforts by sharing measurement data already analyzed by
the US through participation in US test and analysis activities.

Moreover, Japan’s introductionof an indigenous high performance ground-based radar, and subsequent the US reliance on such
Japanese BMD capability will increase interdependence on system analysis.

This would be one of

the ways to narrow a technological gap.
4)

Japan-US Cooperation

Strict application of Japan’s arms export restrictions has been a barrier to joint development andproduction of defense equipment. A Statement of the Chief Cabinet Secretary issued with therevised National Defense Program Guideline in December, 2004, noted, “[i]f Japan decides that it
will engage in joint development and production of ballistic missile defense systems with the US,
however, the Three Principles will not be applied, under the condition that strict control ismaintained, because such systems and related activities will contribute to the effective operationof the Japan-U.S. security arrangements and are conducive to the security of Japan.”
Although exports of BMD products are literally limited to the US, the fact that the Japanese
Government has revised its application of the Three Principles on Arms Export is quite significant.
Not only could effective work sharing and mutual usage of production lines for SM-3 (or PAC-3)
become possible, but Japan and the US could also support each other in cases where one country
experiences sudden increases in demand or reduction of production capacity.

For Japanese

defense industry, there will be opportunity to deliver products to the US as well as Japan, and thus
benefit from more cost-effective production.

Naturally, defense-related exports should continue tohave some degree of control; in particular, third party transfers should be undertaken with great
care.
Revised application of arms export restrictions is a favorable development for Japan-US
cooperation, but other issues remain.

For example, dialogue on specific projects without thoroughdiscussion on appropriate terms for joint development could result in increased dependence andsubordination of Japan toward the US, inhibiting independent thinking on the development oroperation of BMD systems in Japan.
tendency toward dependence.

Data-sharing concerns in particular could increase such

Given the technological gap between Japan and the US, it isinevitable that the US views Japan as being less experienced and lacking credible operational data－173－

as well as funding resources, thus obstructing development of its own software.12
Cooperation between Japan and the US on BMD systems has focused on technologies related tomissiles and their platforms; discussion of C2BMC has hardly begun.

Currently there is nocommon understanding on development of C2BMC, so that technologies for exchange have notbeen identified.

One of the reasons for this is insufficient discussion on the development of joint

operational plans and procedures for BMD.
Japan-US defense industrial cooperation is limited due to policy and regulatory restrictions as
discussed above, a situation that impacts unfavorably on overall BMD cooperation.

Even if

Japanese and US companies want to explore possible cooperation outside the framework of agreed
projects, discussion would be limited to public information.

The Framework Memorandum ofUnderstanding (MOU) on Japan-US BMD cooperation does not allow industry to exchange viewson BMD projects except those authorized for Aegis BMD systems (and then only between theprime contractors), so industry has no incentive to recommend beneficial proposals.
5)

Information Collection Capability

At present Japan does not have early warning satellites equipped with infra-red sensors, and theresolution of its information gathering satellites is much less than those of US spy satellites.
Therefore, Japan has to rely on the US for much of its pre-launch intelligence as well as early
warning information.

The US, on the other hand, wants to obtain sensor information gathered inJapan as it is closer to North Korea and other regional countries.
This seems to be an interdependent relationship, but that is not really the case.

While the US

has already developed a comprehensive system to gather information required for the BMD
operations, Japan lacks information collection capability for early warning, and information
obtainable through other sensors is not better than that of the US.
collection capabilities raises the following concerns.

This gap in information

First, if Japan and the US exchange

information on the basis of equivalence instead of transferring all information available, thenJapan may not be able to have all the information it needs from the US. Second, if the US
provides sufficient information to Japan, Japan’s dependence on the US becomes excessive,
obstructing its interests in independent BMD operations.

To receive sufficient information fromthe US while maintaining independence in BMD operations, Japan must develop an advanced
level of information collection capability.

Masahiro Matsumura, “The International Politics of Datalink: Prescribing Japan’s Policy for AllianceManagement,” The Journal of International Security, Vol.31, No. 3 (December 2003), p.19(in Japanese).
12

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6)

Spiral Development

The SM-3 Block IA Japan will introduce initially is to be upgraded through the US “spiraldevelopment”approach to acquisitions.13

Spiral development aims to introduce weapons systems

that are not fully matured, and gradually develop such equipment by adapting to changes inthreats, absorbing operational experience, and incorporating new technologies where appropriate.
As it will be some time before Japan introduces the upgraded SM-3 (Block IIA), Japan may need to
improve early SM-3s phase by phase, or acquire upgraded Block 1 SM-3s to remain effective
against ballistic missile threats and ensure interoperability with US BMD forces.

However, such

upgrades would require additions to the originally assumed budget, and it may become necessary
to store stocks of spare components for earlier SM-3 versions, which would complicate training andlogistic activities.
One notable characteristic of Joint Development of SM-3 Block IIA is Japan’s adoption of a spiraldevelopment approach.

Although Japan expected to start Joint Research tests in 2006, it decided

to implement Joint Development in December 2005, stating that there is a good prospect ofovercoming initial technological problems.

This reflects a spiral development approach.

Spiraldevelopment is an extremely effective acquisition method for R&D, introduction, and improvementof advanced capabilities such as BMD.

However, Japan must consider how to integrate spiraldevelopment practices into current Ministry of Defense budget and procurement procedures.
Such efforts must also address criticism, not only in the US but also in Japan, that the initial BMD
system is not sufficiently developed.14

Moreover, under the spiral development approach, thefinal form of a weapon system is not apparent at the initial stage, so that it is difficult to estimate
the total budget.

With the possibility of excessive demand from users, it is quite possible thatcosts will become much more than originally planned.

For Japan-US joint development, bothcountries need to review the objectives and terms of work for each stage of the program, and to
determine appropriate cost-sharing for each country.
7)

US Policy Changes

Commitment by Japan and the US to a long term project always faces the risk of policy changes by
a new US administration.

While the Republican and Democrat parties agree on the promotion of

BMD, they differ on the pace of promotion, and which systems should be prioritized.

BushAdministration policy to actively promote BMD actually accelerated Japan’s BMD planning.

On

13 MDA listed the targets for Block 06, such as: increasing Block 04 capabilities; addition of limited capability
to intercept long-range ballistic missiles; and improved Aegis BMD performance as remote sensors. See
Ronald T. Kadish, Director, Missile Defense Agency, “Missile Defense Program and Fiscal Year 2004 Budget,”before the Senate Armed Services Committee, March 18, 2003; General Accounting Office, Missile Defense:
Actions Are Needed to Enhance Testing and Accountability, GAO-04-409 (April 2004), p. 41.
14 See, for example, Philip Coyle, “Is Missile Defense on Target?” Arms Control Today, Vol. 33, No. 8 (October2003) [http://www.armscontrol.org/act/2003_10/Coyle_10.asp]. He criticized the US decision on missile
defense deployment for 2004-2005 as the introduction of an underdeveloped system with insufficient tests.
For PAC-3, also, there was criticism that there were no tests using Scud missiles, or actual use in combat.

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the other hand, the Bush Administration decided to cancel the development of Navy Area Defense(NAD).

Although such a change may have been a relatively minor one for the US, it could have

had a significant impact on a program partner. As noted above, Bush Administration use of aspiral development approach to acquisition could also have significant effect on the development
and procurement practices of a joint project partner.
The Bush Administration also changed NTWD to “Aegis BMD” and removed the distinction
between Theater Missile Defense (TMD) and National Missile Defense (NMD).

Its decision toacquire initial (13.5 inch airframe Block 0-I) versions of SM-3 for Aegis BMD was linked to spiraldevelopment of upgrades; this became the basis of the US offer of Sea-Based BMD to Japan.

Onthe other hand, initial US reluctance to adopt a larger (21 inch airframe, now Block II) version of
SM-3 questioned the significance of having a Japan-US project.

There may be further USchanges in missile defense policies that could impact work with Japan; thus Japan must consider
how to reduce such risks in the future.
3.

Future Measures

1)

Defense Industry and its Technology Base

To reinforce ballistic missile defense capabilities, Japan must strengthen its BMD-related defense
industrial/technology base. At the same time, such action must proceed in balance with otherareas of industrial/technology capability.

Defense budgets are not likely to increase for someyears, and BMD system development will demand more funds in the future, even as Japan is
asked to bear substantial expense for the realignment of US Forces in Japan.

If BMD is the mostcritical issue for Japanese national security policy, it may be necessary to exert to more politicalpressure for funding, as well as consider the possibility of supporting BMD programs through aspecial national budget.
Japan also needs to consider how it can support its defense industry and its technology basewithin limited budgets.

One of the ways could be to establish a joint facility for PAC-3 or SM-3

support in Japan, where Japanese companies can service equipment owned by both Japan and the
US.15

This would not only help maintain the technological level of Japanese defense contractors,

but also benefit US missile defense deployments in and around Japan, since the missiles would notneed to return to the US for maintenance.

For the upgraded SM-3 (Block IIA) being co-developed

by Japan and the US, both sides must cooperate to complete development and smoothly proceed tojoint production.

Japan should discuss production matters with the US from an early stage ofdevelopment to obtain for Japan production of components other than those it is to develop, as wellas the assembly of complete missiles.

See, for example, Fumio Kyuma, “Keynote Address at the Sixth Japan-US Security Strategy Meeting,”2005 (in Japanese).
15

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On the other hand, Japan should consider how to contribute to US MD capability throughcooperation on developing Japan’s BMD system, while maintaining Japan’s operational
independence.

Since BMD is a high priority issue for both Japan and the US, it may be possible

to gain US cooperation.

However, Japan should make every effort to develop capabilities for

information gathering, C2BMC, and data-linking, and thus avoid over-dependence on the US.
Certainly, such technological capability cannot be obtained overnight.

For the moment, it is morepractical for Japan to provide component technologies that can contribute to the US MD system,
further develop an interdependence, request technology transfers from the US, and graduallystrengthen Japanese technological capabilities.

There is a particular need for continuity indevelopment experience in the area of systems design and integration.

While ultimately

targeting systems integration of BMD as a whole, Japan needs to raise its technological level toenable the integration of individual components and subsystems in a BMD system.
2)

Promotion of Technological Exchanges on C2BMC

To promote technology cooperation on C2BMC it will be important to thoroughly understand eachother’s systems and methods through active exchange exercises.
incorporate Japanese companies into FMS contracts.

It may be possible toOr, companies and research institutes inboth countries could support each other’s systems development under a SETA (system engineering
technical assistance) Agreement,16 with configuration and confidentiality controls required forJapan-US cooperation.
3)

Establishment of M&S Center

Japan’s BMD development will progress with the Ministry of Defense taking on a central role inplanning, integration of research and development work, and decisions on policies and operation.
Public and private sector interests in Japan should acquire comprehensive M&S (Modeling &Simulation) capabilities and establish an organization that can effectively use such resources tosupport Ministry of Defense efforts.
In the US, the JNIC (Joint National Integration Center), which directly reports to the Director of
MDA, performs systems integration and interoperability measures that cannot be implemented at
Service levels, and develops plans for comprehensive BMD operations.

Specifically, the JINC : ①

carries out development, procurement, and deployment analysis of MD system; ② supports
integrated missile defense doctrine and operational plan development; and ③ uses integrated
simulation and war games to support the MD plan and systems integration of BMC4I.

The use ofPrivate sector and neural expert organizations that supports the use requirement, designing, andassessment from the viewpoint of experts, and support the government in technological and management
aspects.

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M&S, with which the US still has considerable problems, is an essential function in thedevelopment of MD systems.17

In the United Kingdom, the Missile Defense Centre (MDC) wasestablished in 2003 through government-industry cooperation.

The main purpose of this Centre

is to promote the participation of British companies in the US MD program, and incorporates M&S
as a way to link with the US JNIC.

In NATO, NC3A (NATO Consultation, Command and Control

Agency) has the M&S capability to support NATO activities.
Japan also must implement M&S to build the most appropriate and effective BMD system for its
requirements.

To implement such M&S capability, it will be “necessary to have simulationinterfaced with real world systems to support real-time decision-making and thus make training
more effective.” 18

Furthermore, Japan needs the US to share as much as possible themeasurement data it has already acquired and analyzed through tests of BMD interception.

Itwill also be useful to integrate simulation software in operational equipment.
Thus, Japan needs its own M&S capability to build a truly effective BMD system.

Japan should

establish a M&S Center like the US JNIC or UK MDC through the cooperation of government andindustry, and with association with the US.
4)

Building an Early Warning System

Japan will import an Unmanned Aerial Vehicle (UAV) system from the US in 2007.

This UAV

will be equipped with image collection and infrared sensors to detect ballistic missile launches.
In November 2005, the MSDF UP-3C multipurpose aircraft equipped with “air boss” (infrared
detection equipment for high-altitude operations under development at Technical Research andDevelopment Institute of the Ministry of Defense) participated in a US ballistic missileinterception test and succeeded in detecting and tracking exercises.19 During the North Korean
missile launches in July 2006, electronic intelligence aircraft such as the MSDF EP-3C and ASDF
YS-11E collected and analyzed information along with US Forces and significantly contributed totask force readiness.

This is important in terms of Japan understanding the essential role ofinformation collection systems.

Japan is to consider the introduction of aircraft for collecting

missile launch data, such as the RC-135 used by US Forces, but as aircraft systems may have
limited capability, Japan also needs to examine the acquisition of early warning satellites.
Japan is prohibited to use space for military purposes under the “Resolution on the Peaceful Use of
the Space” passed by the Diet in 1969, but internationally the use of space for

17

defense purposes

About the situation of M&S related to missile defense in the US, see Defense Science Board Task Force,

Missile Defense Phase III: Modeling and Simulation, Office of the Undersecretary of Defense for Acquisition,

Technology, and Logistics, March 2004.
Hiroshi Ikawa “Baseline Assessment of Modeling and Simulation (M&S),” DRC Annual Report 200”, 2001
[http://www.drc-jpn.org/AR-5J/ikawa-j.htm] (in Japanese).
19 Sankei Simbun, November 19, 2005.
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is now widely accepted.

There has been discussion on revision of Japan’s space policies in the

direction of the international community.

For UAV and early warning satellites, import from the

US seems practical at present, but Japan and US should find room for Japanese industry to play arole in these programs.
5)

Expansion of Japan-US Technology Cooperation

Along with joint development and future production of the SM-3 Block IIA, Japan should explore
additional opportunities for joint R&D related to BMD, and begin studies on next generation
systems. Defense against cruise missiles or SRBMs launched from off-shore container ships, which
are drawing attention as new threats, could be important subjects for such studies.

Studies fornext-generation systems could include the addition of ballistic missile interception capability to
mid-range air defense missiles (like the Japanese Chu-SAM) by retrofitting appropriate radar andguidance equipment.

Future Chu-SAM could be a project on which Japan takes the initiative forjoint development and production.
Although close cooperation with the US is inevitable, maintaining independence in thedevelopment of BMD capabilities will require Japan to further develop technologies in various
BMD system areas and systems integration, as well as capability to operate a BMD system.

Inthe face of budgetary and technological constraints, Japan needs to choose appropriate systems, aswell as support related defense industrial/technology capabilities, and concentrate resources into
selected areas.

For this, Japan needs to determine clear policies for “selection/concentration” and“produce/purchase” on the following points:
・ What equipment Japan can renounce or reduce?
・ What are the systems and technologies Japan needs to develop on its own to maintain its
defense industrial/technology base?

What equipment should be imported?

・ What are the technological fields where Japan has an advantage, and for what equipment
does Japan need to distribute production with regard to supply from the US?

Whatshould Japan approach work sharing arrangements?
・ What would be the ideal model for cooperation between Japan and the US?

In particular,

what roles should Japan seek?
Given rapid advances in technologies, the Japanese government must provide strategic support todevelop key technologies, while incorporating the views of its defense industry.

If Japan-US joint

R&D, production, and operations can complement such efforts by Japan, it becomes possible tohave a favorable cooperative relationship on BMD and respond effectively to ballistic missile
threats.
BMD is a large scale system that cannot be built solely by Japan.
cooperation with, and imports from the US.

It is inevitable to have

For a policy of “selection and concentration,” Japan

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must “identify core areas based on needs that reflect future defense program, and technologies
needed to gain superiority in future combat.

Moreover, Japan needs to maintain industrial

capabilities that are irrecoverable once lost, since these are essential for BMD and have no use
other than for defense purposes.”20

Ensuring independence in BMD operations will continue tobe an important consideration in fields related to information collection and decision-making(technologies for sensors, network and data-linkage, C2BMC, and space usage).

These are areas

where spin-offs from private sector technologies can be expected, and areas where Japan has
strength.

In view of participating in the US MD system, it is increasingly important to search fortechnologies applicable to BMD in which Japan has superiority relative to other countries.
If Japan can develop clear policies and strategies in the areas discussed above, it can
independently propose subjects for joint development as well as appropriate roles Japan can take.
Until now, cooperation with the US has been a relationship of supplier (US) and customer (Japan),but this can be changed to more of a partnership on equal footing.
To further promote Japan-US cooperation in the development and production of BMD systems,
Japan must adopt some legal and regulatory measures.

Agreement on a MOU to enable

comprehensive interaction between Japanese and US industries would be a first step in thisdirection.

Conclusion of a General Security of Military Information Agreement (GSOMIA)

between Japan and the US would help ensure a credible system for the protection of sensitive
defense information.

Japan should also strengthen public-private sector cooperation, and makebetter use of private sector creativity. Japanese government encouragement of active dialogue
between Japanese and US industry, and its willingness to consider proposals on cooperation
projects, would be a strong incentive for defense industries to undertake such initiatives.

Efforts

to strengthen Japan’s defense industrial/ technology base should maximize the use of technologies
from industry and research institutes whose staff often are unaware that their resources havepotential application to security purposes, and build effective linkages among industry, academics,
and the public sectors.

Meetings on Strategy to Procure Defense Equipment, “Toward the Procurement of Equipment for a New
Age,” p.20.
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Chapter 13

Responses to Cruise Missiles

1.

Proliferation and Increasing Threat of Cruise Missiles

1)

Proliferation of Cruise Missiles

As described in Chapter 1, cruise missiles approach targets by flying through the atmosphere.
They can be classified by targets as Anti-Ship Cruise Missiles (ASCM), and Land Attack Cruise
Missiles (LACM), or by launch platform such as Air-Launched Cruise Missiles (ALCM) and
Ship-Launched Cruise Missiles (SLCM).
Over 80 countries have cruise missiles at present, and 18 of these countries can manufacture them.
There are over 100 different types of cruise missiles, including derivatives, with an estimated totalof 70,000-80,000 missiles in existence.
cruise missile proliferation.1

Russia is said to be the most important player in terms ofHigh-performance cruise missiles are valuable export products for

Russia; for example, it has exported the SS-N-22 to China, with Sovremenny-class destroyers as
platforms. Continued Russian exports of cruise missiles and related equipment and materials aswell as technologies will accelerate the proliferation of such weapons around the world.
Soviet countries have also exported cruise missiles and related products.

Former

The Kh-55s ALCMs leftin Ukraine were reportedly exported to Iran and China illegally and there is concern that even
North Korea may have received them.2
China continues to build up its cruise missile inventory, with the planned deployment of an
upgraded “Ying Ji” ALCM (with a 400-500 km range) within 2 to 3 years, and tests of an upgraded“Hong Niao” LACM (with a 2500 km or greater range) were conducted in August 2004.

Accordingto a US assessment, China is likely to possess several hundred LACMs with greater accuracy by
the year 2015.3

Taiwan, which is strongly concerned by China’s military build-up, tested its

ASCM “Xiong Fu 2E” (1000 km range) in June 2005, and has since begun deployment.4

In

addition, Pakistan tested its “Hatf” cruise missile (500 km range) which has a rather short range
but can carry nuclear warheads.5
2)

Factors Accelerating the Proliferation of Cruise Missiles

The primary factor behind the proliferation of cruise missiles is their low expense compared toballistic missiles.

For example, $50 million allows the purchase of 1 or 2 advanced tactical

Thomas G. Mahnken, The Cruise Missile Challenge (Washington D.C.: Center for Strategic and Budgetary
Assessments, 2005), p. 18.
2 Andrew Feickert, “Missile Survey: Ballistic and Cruise Missiles of Selected Foreign Countries” CRS Report
for Congress, RL30427 (Updated July 26, 2005), p. 9.
3 Lowell E. Jacoby, Director, Defense Intelligence Agency, “Current and Projected National Security Threats
to the United States,” Statement for the Record, Senate Select Committee on Intelligence, 16 February 2005.
4 Yomiuri Shimbun, August 13, 2005 (morning edition).
5 Yomiuri Shimbun, August 12, 2005 (morning edition).
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fighters, 15 theater ballistic missiles with 3 launchers, or 100 cruise missiles. 6

Also, thetechnologies required to develop and manufacture cruise missiles are more easily accessible thanthose of ballistic missiles.7

Formerly, the difficult parts of building cruise missiles were thenavigation, guidance, and propulsion systems, but recently such obstacles have diminished.
The most advanced US LACM, “Tomahawk,” is equipped with navigation systems such as Terrain
Contour Matching (TERCOM) and Digital Scene Matching Area Correlation (DSMAC).

As thesesystems rely on precision mapping obtained from secret reconnaissance systems, it is reportedly
difficult to export them.

On the other hand, due to the widespread use of GPS, it has become

easier to produce effective navigation systems that are less expensive than the high precision andstand-alone Inertial Navigation System (INS).

Since GPS could become unavailable inemergencies if the US sets the system to allow only the use of equipment with military
specifications, there are efforts to develop satellite-based ground positioning systems that do not
rely on GPS.8

For propulsion, turbojet engines widely used in airplanes can be easily converted

for use in cruise missiles.9

In short, cruise missiles can be developed and manufactured withmore readily available dual-use technologies than can ballistic missiles.
It is obviously more difficult to implement effective export controls for cruise missiles. There is noconsensus among Missile Technology Control Regime (MTCR) members on cruise missile controls.
Many materials, equipment, and technologies used for cruise missiles can also be used for various
purposes.

Due to the structural characteristics of cruise missiles, it is difficult to accurately

identify the ranges and payloads of completed missiles; furthermore, lists of controlled items
cannot keep up with technology developments. 10

In addition, cruise missile items andtechnologies are embedded in the aviation industry.

The US, a primary exporter of advanced

aviation systems, is not fully active in promoting strengthened export controls over cruise
missile-related products.

Some observers point out that strict export controls on GPS, propulsion,

and/or flight control systems might cause a loss of property rights within the aviation industry.11
Export controls over cruise missiles can hardly be described as being strictly implemented as in
the case of ballistic missiles.

Under the MTCR, Category 1 missiles requiring very strict export

controls have ranges of 300 km or longer and payloads of 500 kg or greater.

Since the range andpayload capabilities of cruise missiles are difficult to identify, they may hence provide a loophole
Adam J. Hebert, “Cruise Control,” Air Force Magazine, Vol. 85, No. 12 (December 2002), p. 43.
Loren Thompson, “Cruise Missile Defense: Connecting Theater Capabilities to Homeland Needs,” White
Paper (Lexington Institute), December 31, 2004, p. 7.
8 For example, China participates in the EU Galileo satellite navigation program. Thus there is concern that
China could use Galileo-based GPS for its cruise missiles.
9 Dennis Gormley, “Addressing the Cruise Missile Threat: Defense and Diplomatic Responses,” Proliferation
Papers, Spring 2002, pp. 5-6; Hebert, “Cruise Control,” pp. 43-44.
10 Dennis M. Gormley, “Prepared Statement,” Hearing of the International Security, Proliferation andFederal Services Subcommittee of the Senate Governmental Affairs Committee, February 12, 2002.
11 Hebert, “Cruise Control,” p. 45.
6
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for exporters.

Furthermore, countries capable of manufacturing cruise missiles, such as Brazil,

China, India, Iran, Iraq, Israel, and North Korea are not members of the MTCR.

This is anotherfactor that accelerates the proliferation of cruise missiles.
As cruise missiles are less costly, it is easier to use them for saturation attacks.

Being generally

smaller than ballistic missiles, they have greater stealth and mobility. As cruise missiles have
low signatures and fly at low altitudes, ground- or ship-based sensors can detect them at only
short distances.

Even in the case of monitoring by aircraft-based sensors, cruise missiles can bedifficult to detect due to ground clutter.

Improved stealth technologies and use of deception

techniques like chaff and decoys make the detection of cruise missiles even more difficult.
Generally cruise missiles are very accurate, so they can be used for attacks on key facilities suchas nuclear power plants or chemical factories.
cruise missiles can still do great damage.

Therefore, even if their warheads have less impact,

In comparison to ballistic missiles that fly into space atsupersonic speed, cruise missiles flying in the atmosphere at lower speed require less maintenancework on the material in their warheads, so they are useful for delivery of WMD payloads,
especially biological and chemical weapons. As cruise missiles can be launched from various
platforms, terrorist groups could attack coastal areas using cruise missiles concealed on container
ships.12
No effective Cruise Missile Defense (CMD) system has been established, and development efforts
to build such a system are far behind those of BMD.

Once more effective BMD systems are

established, those countries and non-state actors seeking missile attack options may become moreinterested in cruise missiles.13
2.

Cruise Missile Defense (CMD)

1)

Current Status of CMD in Japan and the US

In response to the Defense Authorization Bill of 1996, the US Defense Department has developed
several CMD proposals.

For example, the Army is developing the Joint Land Attack Cruise

Missile Defense Elevated Netted Sensor System (JLENS), which is a balloon the size of a football
field equipped with various sensors and communication systems for airborne detection andtracking of cruise missiles.

This system is to be deployed from 2010.

Introduction of the Surface

Launched Advanced Medium Range Air-to-Air Missile (SLAMRAAM) with CMD capability is

12 See, for example, the United States of America, The National Strategy for Maritime Security, September
2005, p. 8.
13 About the characteristics of cruise missiles, see Gormley, “Addressing the Cruise Missile Threat,” p. 5;
Mahnken, The Cruise Missile Challenge, pp. 32-33.

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scheduled for 2008.14

The Army is also working on less expensive cruise missile interceptors witha range of 50 miles and equipped with active sensors.
The Navy is approaching CMD through the introduction of Cooperative Engagement Capability(CEC) on Aegis ships and E-2C Hawkeye early warning aircraft.

The Air Force already has

AWACS (Airborne Warning and Control System) aircraft and Advanced Medium Range Air-to-Air
Missiles (AMRAAM).15

The US is also developing CMD capabilities through the Joint Theater

Air and Missile Defense Organization (JTAMDO), Single Integrated Air Picture (SIAP), Joint
Combat Identification Evaluation Team (JCIET), and Integrated Fire Control (IFC) systems.16
However, US CMD capabilities are still limited.
for effective interception of cruise missiles.17

The PAC-3 system requires further development

The US Navy has the most extensive experience indefense against low-altitude air attack, 18 but still lacks effective capability against
high-performance ASCMs.19

Except for study of BMD/CMD applications for the Medium Range

Extended Air Defense System (MEADS) under development by the US, Germany and Italy, each
US service is proceeding with separate CMD measures.
Japan’s Type 03 medium-range air defense missile (Chu-SAM) reportedly has capabilities against
aircraft, air-to-ground missiles (including those that can dive at sharp angles), and cruise missiles.
The MSDF has deployed various weapon and electronic warfare systems to achieve comprehensive
air/missile defense capabilities.

The ASDF has some look-down and shoot-down capability, but

has yet to acquire the means for defense against land attack cruise missiles.
2)

Difficulties posed by CMD

The interception of cruise missiles involves detection, tracking and identification of incoming
cruise missiles, and finally interception.

In addition, following identification it is possible to cue

sensors and other systems on the course of an incoming missile’s flight.

Although the process of

CMD is basically that of BMD, there are huge differences in technologies as well as operations, sothat improvements in BMD will not necessarily lead to a strengthening of CMD capability.
Larry J. Dodgen, Commanding General, U.S. Army Space and Missile Defense Command and U.S. Army
Forces Strategic Command, “Statement,” Before the Committee on Armed Services, Strategic Forces
Subcommittee, United States House of Representatives, March 15, 2005.
15 Thompson, “Cruise Missile Defense,” pp. 16-21; Mahnken, The Cruise Missile Challenge, pp. 43-44.
16 Ravi R. Hichkad and Christopher Bolkcom, “Cruise Missile Defense,” CRS Report for Congress, RS21921(Updated May 2, 2005), pp. 3-5.
17 Andrew Feickert, “Missile Survey: Ballistic and Cruise Missiles of Selected Foreign Countries,” CRS
Report for Congress, RL30427 (Updated July 26, 2005), p. 24. Theoretically, PAC-3 has a capability tointercept cruise missiles flying in at the lower altitude, but they will not be able to discover such missiles
unless they are within 35 km range, due to the horizon limit of radar. Dennis M. Gormley, “Testimony,” Before
the Subcommittee on National Security, Emerging Threats, and International Affairs of the U.S. House ofRepresentatives Committee on Governmental Reform, March 9, 2004 [http:// cns.miis.edu/research/ congress/
testim/testgorm.htm].
18 Thompson, “Cruise Missile Defense,” p. 16.
19 Mahnken, The Cruise Missile Challenge, pp. 18, 41.
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CMD more resembles air defense (though on a differing scale) than BMD.

Ballistic missiles rely

on inertial flight through space and have hypersonic terminal velocities.

Cruise missiles, on theother hand, fly through the atmosphere, usually at sub- to trans-sonic velocities (thoughsupersonic cruise missiles have appeared recently); thus their flight characteristics resemble thoseof aircraft rather than ballistic missiles.
Because cruise missiles are slower than ballistic missiles, their interception upon target
confirmation seems not too difficult.

However, detection, tracking, identification and interceptionof cruise missiles is in fact more difficult than is the case with ballistic missiles.20

As noted above,it is not easy to detect cruise missiles, and because of their maneuverability, which ballistic
missiles lack, it is more difficult to identify their targets and then track the missiles for cueing
operations.

Moreover, because of their flight altitudes and courses, as well as radar images, one

could mistake cruise missiles for aircraft.

In addition, in the case of combined cruise and ballistic

missile attacks, air and missile defense systems will face the difficulty of simultaneously
responding to high- and low-altitude threats.21
Another difficulty in building an effective CMD system is the shortness of time from cruise missile
launch to impact (ten minutes in the case of a 100 km range missile), thus requiring the executionof processes from detection to interception in a very brief period.

There may seem to be little

difference in flight time compared to a North Korean No Dong ballistic missile.

However, unlike

ballistic missiles launches that can be detected and cued by early warning satellites, cruise
missiles are likely to come close to their targets before being detected, so reaction time will bemuch less.

In other words, CMD requires the building of an extremely automated system toenable real-time decision-making.
The fact that cruise missiles can use various types of platforms indicates that monitoring andwarning systems should be set at a much broader scope than those for BMD.

Japan’sgeographical features means that attacks can be made from any direction. Therefore, Japan
must build a monitoring and warning network for CMD that covers its entire territory.
In addition, the interception process itself presents different challenges from those of BMD. As
described before, lower-cost cruise missiles encourage saturation attacks.

Confronting suchattacks will require a highly cost-effective defense system to ensure a sufficient quantity of

20 US CMD capability is deficient in monitoring networks to detect and track cruise missiles, in quick
identification of unknown flying objects, and in the fire control system of integrated combat systems.
Thompson, “Cruise Missile Defense,” p. 13; Hichkad and Bolkcom, “Cruise Missile Defense,” p. 3.
21 Gormley, “Addressing the Cruise Missile Threat,” p. 13; Christopher Bolkcom and Sharon Squassoni,“Cruise Missile Proliferation,” CRS Report for Congress, RS21252 (July 3, 2002), p. 4; Mahnken, The Cruise
Missile Challenge, pp. 42-43.

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interceptors and thus a credible capability.

In addition, it is necessary to consider that, especiallyin the case of cruise missiles with WMD warheads, the need to neutralize warheads and mitigate
fall-out damage could be even greater than with the case of BMD.
As cruise missiles fly at lower velocities in the atmosphere, kinetic warheads used for BMD may
not provide sufficient energy to destroy cruise missile warheads.

Even if such kinetic warheads“hit” nuclear warheads on cruise missiles, the destructive energy may not be sufficient to damage
the ignition devices or molded fissile materials within the warheads and thus prevent a nuclear
explosion.

(In the case of BMD, a direct hit would instantly destroy the ignition apparatus due tothe energy from hypersonic velocities.)

For similar reasons, biological or chemical warheads may

cause damage unless sufficient thermal energy is imparted to toxic agents in the warheads tomake them harmless at the instant of interception.22
3.

Future Measures against Cruise Missile Attacks

1)

Building an Effective CMD System

An effective CMD system will require an air defense network more densely distributed than thatfor a BMD system, and C4ISR systems automated to allow the shortest possible response time(similar to the C2BMC system needed for control of BMD operations).

Implementation of CMD

will require the following measures: collection and distribution of relevant information;
surveillance over as broad an area as possible; continuous monitoring of potential attack routes;
rapid identification of threats; continuous, all-weather tracking of potential threats; strengthened
capabilities to enable interception at harmless locations as far away as possible from intended
targets (such as over water); and systems integration as well as linkage to the SDF and otherrelevant organizations.23
The critical part of the above process is the building of a sensor network that enables effective
detection, tracking and identification of cruise missiles.
not necessarily required for CMD.

High-powered sensors used for BMD are

Due to the horizon limit of radar, low-altitude objects such as

cruise missiles cannot be detected until they get closer to their targets. Rather, CMD will require
the development of networks to continuously distribute information through deployment of lessexpensive sensors over as wide an area as possible.
Also, development of technologies to eliminate obstruction from ground clutter will enable
look-down operations from airborne sensors.

Installation of sensors to monitor cruise missiles on

existing SDF aircraft such as P-3Cs or E-2Cs would allow them to be used for continuous
In case of ballistic missiles defense, especially when interception is made in outer space, it is possible tosignificantly reduce the probabilities of receiving damage from fall-out.
23 Gormley, “Addressing the Cruise Missile Threat,” pp. 14-17; Thompson, “Cruise Missile Defense,” pp.
10-12.; Charles E. Lambert, “The Cruise Missile Conundrum,” Aerospace America Online, (February2003)[http://www.aiaa.org/aerospace/Article.cfm?issuetocid=309&ArchiveIssueID=35].
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surveillance of cruise missile threats in the seas and airspace surrounding Japan.

Not only SDF

but also Coast Guard and air control radars can be used to obtain information needed to detect
cruise missiles.

It is even possible to detect dispersion waves reflected from cruise missiles whenstruck by waves emitted from FM radio stations throughout Japan.
Sharing surveillance information will require either strengthening existing networks or building
new ones.

In this case there is no need to centralize C2BMC systems as in the case of JADGE,

which the ASDF is developing for both BMD and air defense. Given significant improvements incomputers and communication network capabilities, current information collection and control
systems tend to be less centralized, relying on a network of distributed systems.

As CMDrequires very short response times (like BMD, though for differing reasons), its C2BMC
capabilities need to be more distributed than those for existing air defense systems.

Also, theMSDF needs a CEC network to enable distribution of sensors and shooters.
Another option for Japan could be to add CMD capability to conventional mid-range SAMs.
Mid-range SAMs can be given increased velocity as well as side thrusters to improve
maneuverability.

In addition to improved performance, another challenge will be development oflower-cost interceptor missiles for response to saturation attacks.
Other options for using existing assets may include interception of cruise missiles using air-to-air
missiles fired by F-15 fighters, or fire from traditional air defense artillery.

Rather than such

“hard kill” measures, however, it may in fact be more effective for local or area defense to use “softkill” techniques such as disruption of missile flights through jamming navigation systems.
Since cruise missiles can be launched from various types of platforms, the ultimate goal for CMD
is to deploy surveillance sensors and interception systems over the entire area of Japan.
Considering the high accuracy of cruise missiles, an enemy country or non-state actor using themis likely to plan pin-point attacks on a specific target, so it is necessary to defend key points suchas important infrastructures or urban political and economic centers.
2)

Promotion of Cruise Missile Defense

At present, BMD is one of Japan’s highest defense priorities.

Since first budgeted in 2004, theportion of BMD in overall defense acquisition expenditures continues to exceed 10% each year.
Without increases in overall defense budgets, it may be difficult to add significant funding for
CMD.

However, the threats Japan faces now are mostly from ballistic missiles, and it will besome time before serious threats from cruise missiles become evident.
For the moment, placing priority on BMD is appropriate for Japan.

Of course cruise missile

threats are likely to increase, and Japan should begin development of CMD systems as soon as－187－possible.

Gradual strengthening of air defense capabilities against cruise missiles would be arealistic option.

To utilize limited budgets and assets more efficiently, Japan should consider the

possibility of building CMD capabilities interoperable with BMD and existing air defense systems.
In addition, as in the case with the 5Ds of BMD, Japan should seek comprehensive measures for
CMD that incorporate dissuasion, deterrence, denial, defense capabilities and damage
confinement.
Measures for dissuasion diplomacy could include the strengthening of export control regimes such
as MTCR and the Wassenaar Arrangement, and the prevention of further proliferation to rogue
states or non-state actors through the Proliferation Security Initiative (PSI).

The deterrence

element of CMD could be based on multi-layer defense measures covering offensive defense (denial
capability), active defense (defense operations) and passive defense (damage confinement).
Offensive defense measures to preempt cruise missile launches would include the capability to
attackground-based

cruisemissilelaunchsites,

andinterdictionofcruisemissileplatforms—submarines, surface warships, aircraft, and even suspicious commercial ships such as
container vessels.

Active defense interception of cruise missiles will require optimal use ofexisting sensor and shooter assets, while building capabilities for electronic soft-kill capabilities.
Passive defense measures can use methods similar to those used for BMD.

Overall, it will beessential to obtain more comprehensive effects by systematically linking capabilities over theentire sequence from offensive defense to active defense and passive defense.

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