Disaster Prevention Measuresby the Tokyo Metropolitan Government

2023/1/31
Bureau of General Affairs Tokyo MetropolitanGovernment

Potential crises

New type of disasters
Armed conflict

CBRNEdisasters

New or re-emerging
infectious disases

Bird flu
Infectious diseases(cholera, dysentery)
Earthquakes

Large-scale incident

Wind/waterdamages

Natural disasters

Man-made disaster

Large scaleterrorist attacks
Cyber-terrorism

Novel influenza

Volcaniceruptions

Existing
disasters
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Framework of Tokyo’s disaster prevention measures
Basic Act on Disaster Management
Nationalgovernment

Disaster Management Basic Plan

Tokyo TMG Regional Disaster Management Plan

Central Disaster
Management council
TMG Disaster
Management Council

Municipality
Local Disaster Management Plan

Municipality Disaster
Management Council

District Disaster Management Plan

Residents, businesses, etc.

Municipality

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Tokyo Metropolitan Government operational framework during disasters
TMG Disaster Management
Headquarters
Information

Information

International Affairs Division,
Office of the Governor for
Policy Planning

Information

Bureau of Citizens, Cultural and Sports
Citizens' Affairs Division
Disaster Information Center for Foreign Nationals

Information

Information
Information

Information

Information

Municipalities
Embassies, etc. in Tokyo

Information

Information

Information
providedby websites, etc.

Foreigners
3Providing information to foreigners① TMG Disaster Prevention
Information website(available in multiple languages)② Digital signage(examples③ Tokyo Metropolitan
Government Disaster
Prevention Guide Book

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Information provision to foreigners④ Disaster Readiness Guide (Chinese,English, Korean)⑤ Disaster Readiness App (Chinese,English, Korean)AndroidiOS

Help Card(Issued by Bureau of Citizens,Cultural and Sports)
Showing useful Japanesephrases to ask for a help forforeign residents.
(Chinese, English, Korean)
5Background to revisions to damage estimates
March 2011: Great East Japan Earthquake
Estimates for damage in Tokyo
following earthquake centered onTokyo, published （2012）■Maximum intensity: Magnitude 7■Buildings destroyed: About 300,000■Deaths: About 9,700 ■Evacuees: About 3.39 million■People unable to return home: About 5.17 million*North Tokyo Bay earthquake

Estimates for damage in Tokyo
following or Nankai Trough earthquakeon Tokyo, published （2013）■Maximum tsunami height: 30.16m (tsunami will arrive
about 15 minutes after the earthquake)■Buildings destroyed: About 1,300 (of which about 1,200
are destroyed by the tsunami)■Deaths: About 1,800※ Carried out based on findings from the 1995 Hyogo-ken Nanbu(Kobe) earthquake and the 2011 Great East Japan earthquake

Developments in the decade since
New insights and knowhow
about damage due to major
earthquakes etc.

Massive earthquake presumably
imminent
Probability of a Nankai Trough earthquake:70％ ➡ 70％-80％

Steady progress with earthquakeresistant urban development
Major changes in social
environment

Preparation of new estimates on which to basedisaster preparedness measures

6Damage Estimates in Tokyo (Epicentral earthquake under southern city center)○ This is an earthquake with the maximum predicted damages within the city, with an intensity of 6
upper or greater effecting approximately 60% of city wards.
○ 194,431 buildings will be damaged, and 6,148 deaths are predicted.
Distribution of intensity for an epicentral earthquake (M7.3)
under the southern city center

Intensity
7
6Upper
6Lower5Upper
5Lower4
3or less7Damage Estimates in Tokyo (Epicentral earthquake under southern city center)

Distribution of collapsed buildings

Number of collapsed buildings

Distribution of burned buildings

Number of burned buildings

8Comparison with earthquake in northern Tokyo Bay, which in the previous
estimate was expected to cause the most damage※ ( ) denotes the previously predicted damages for an earthquake effecting the north of Tokyo Bay.
※ The seismic activity for an epicentral earthquake under the southern city center and an earthquake in northern Tokyo Bay will be different, and could be hard tocompare.
※ Totals may not add up due to rounding to the nearest whole number.
※ Shaking, etc. includes damage from liquefaction and landslides.

9Damage prediction for Tokyo (Subduction-zone earthquake: islands)

OshimaKozushima

ToshimaMiyakejima

NiijimaMikurajima

Shikinejima

MaxTsunami
heightArrival
timeOshima@ 16 m@ 23 min.

Toshima@ 17 m@ 19 min.

Niijima@ 27 m@ 17 min.

Shikinejima @ 28 m

@ 14 min.

Kozushima@ 27 m@ 17 min.

Miyakejima @ 16 m

@ 25 min.

Mikurajima @ 6 m@ 30 min.

Hachijojima @ 17 m

@ 32 min.

Aogashima@ 14 m@ 36 min.

Chichijima@ 15 m@ 126 min.

Hahajima@ 16 m@ 108 min.

Hachiojima
Max flooding
or moreLess than 0.3m
* Flooding on each islandis maximum predictionMax tsunami
or more-Building damage
1,258(1,282)

Deaths952(1,774)( ) Previous prediction

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Aogashima

Chichijima

Hahajima

１Making buildings earthquake-resistant, other renovations◆ Major Specific Efforts
Self-help / mutual-help
 Using seismic diagnosis to confirm earthquake resistance, and having work done on
the building to make it earthquake-resistant if necessary.
 Thoroughly considering where to place and how to secure furniture, home appliances, etc.
 Ensuring the safety of living spaces by fitting windows with shatterproof film, etc.

Public assistance Promoting earthquake-resistant schools, hospitals, and other key public buildingsfor disaster prevention.
 Measures to keep non-structural elements like suspended ceilings and light fixturesfrom falling in school facilities, kindergartens, nursery schools, etc.
 Promoting earthquake-resistant condominiums through financial support toencourage earthquake-resistant retrofitting and reconstruction.
Example of damage caused by the Great
East Japan earthquake ▶

・Make key public buildings for disaster prevention earthquake-resistant ⇒ to 100% as soon as possible
・Prevent suspended ceilings, etc. in Tokyo Metropolitan High Schools from falling ⇒ complete by fiscal 202211

２ Curbing the outbreak and spread of fires◆ Major Specific Efforts
Self-help / mutual-help

 Fireproofing and other fire prevention measures in homes, etc.
 Confirming how to use a fire extinguisher.
 Participating in and interacting with fire brigades, voluntary fire prevention organizations, etc.
Public assistance Promoting the development of earthquake-resistant fire cisterns and deep wells.
 Promoting the development of designated maintenance routes to serve as firebreak belts inthe event of an earthquake disaster as well as for evacuation routes, emergency vehicle
access, etc.
 Encouraging fireproofing through subsidies for rebuilding or demolishing aging woodenbuildings under the Fire Resistance Regulation Zone system.
・Secure firefighters (23 central wards) ⇒ 90% or more of the numbers needed by fiscal 2030
・Designated maintenance routes ⇒ Spanning 28 wards/total of approx. 25 km by fiscal 202512

３ Preventing disorder due to people being unable to return home
◆ Major Specific Efforts
Self-help / mutual-help
 Understanding and putting into practice the idea of preventing everyone from returning home at onceand of helping each other in the event of a disaster.
 Confirming stockpiles and ways to get home if a disaster strikes when you are not at home.
 Developing a safe environment where employees or customers can wait without worrying.

Public assistance Conducting training drills in cooperation with business associations,

local communities etc. for measures to take for people unable to returnhome.
 Improving operational effectiveness in the event of a disaster by

establishing a new system to improve the efficiency of temporary
accommodation facilities, etc.

Training drill for measures for people
unable to return home▲13

４ Smooth establishment and running of evacuation centers◆ Major Specific Efforts
Self-help / mutual-help

 Cooperation by evacuees in the running of evacuation centers.
 Evacuation center management with consideration for various people, where common courtesy
and rules are upheld.
 Utilization of liquid infant formula that can be stored at room temperature.
Public assistance Promoting earthquake-resistant school facilities, social welfare
facilities, etc.
 Promoting the installation of air conditioning in indoor sports
facilities at public schools, etc.
 Support for municipalities that install toilet facilities for use during
disasters such as manhole toilets.
Manhole toilets in a school yard▲(From “Guidelines for the Installation and Operation of Cultivating disaster volunteer coordinators.

Manhole Toilets,” Ministry of Land, Infrastructure, Transportand Tourism (March 2016))

・Create manuals for municipality evacuation center management and operations ⇒ For allmunicipalities by fiscal 2023
14５ Securing drinking water and stockpiling◆ Major Specific Efforts
Self-help / mutual-help
 Preparing gloves, etc. for cleaning up your room.
 Practicing “daily stockpiling” by purchasing a little extra of food and other supplies you use on a day-to-daybasis.
 Paying attention to the expiration dates for batteries and medicine and stockpiling non-food items as well.

Public assistance Promoting earthquake-resistant water treatment plants and water pipes with earthquake-resistant joints.

 Promoting stockpiling, taking into consideration the perspectives of persons with special needs and women.
 Encouraging daily stockpiling of fuel for private vehicles through the “full-tank” campaign.
 Facilitating the introduction of solar power generation equipment, etc. which is also effective as anemergency power source.

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Reference URLs
■ Disaster Prevention web page (multilingual support)
https://www.bousai.metro.tokyo.lg.jp/index.html■ Tokyo Disaster Readiness Guide (Chinese (simplified characters),
English, Korean)Chinese
https://www.bousai.metro.tokyo.lg.jp/bousai/1000031/1003770.html■ Disaster Preparedness Tokyo (Chinese, English, Korean)
https://www.bousai.metro.tokyo.lg.jp/1002147/1008042/index.html■ Disaster Readiness Guide (Chinese, English, Korean)
https://www.bousai.metro.tokyo.lg.jp/1005427/1005746.html
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