Earthquake Disaster
Recovery Plan in TMG“Pre-disaster Management Measures byDistrict and Recovery from Expected
Earthquake Directly Underneath Tokyo”
Planning Section
Urban Development Projects Division
Bureau of Urban Development

Great East Japan Earthquake(Occurred in 2011, M９.０）●TokyoDeath

16 thousand
Persons

Totally Collapsed
Buildings

130 thousand
Buildings

Great Hanshin-Awaji Earthquake(Occurred in 1995, M７.３)●TokyoDeath

6.5 thousand
Persons

Totally Collapsed
Buildings

104 thousand
Buildings

Great Kanto Earthquake(Occurred in 1923, M7.9)

Death

104 thousand
Persons

Destructed Area byFire

36 km2

Destructed Numberof Buildings

366 thousand
Buildings● TokyoEarthquake Disaster Recovery Project(Source: Urban Planning in Tokyo 100 Years)

Metropolitan City Recovery Project after Great Kanto Earthquake in 1923

Eitai Bridge just after the Disaster Event

Nearby Sumida Park

Eitai Bridge after Recovery ProjectShowa Street, Chuo-Ward

Plates surrounding Japan

Plate inContinental Side

Chishima
TrenchJapan
TrenchNankai TroughPhilippines
Sea Plate
NanseiIslandsTrench

SagamiTroughPacific Plate

Izu/
Ogasawara
TrenchMeasures of Pre-disaster Recovery
Project in TMG
Disaster Recovery Manual Disaster Recovery Ground Design Urban Recovery Simulation Drill～ Disaster Recovery Manual ～(Amended in March 2003)(Government)(Citizens)• Recovery• Recovery ProcessMeasures• Action Program• Urban Recovery

Occurrence

Flow of Recovery Works(Earthquake Disaster Recovery Manualin TMG)
Phase I

Phase II

1 Week 2 Weeks

1 MonthPhase III

Phase IV

2 Months 3 Months 6 Months

Phase V2 Years

6) Target Area 7) Basic Plan for 9) Urban Development
For Recovery Urban Recovery Plan For Recovery(Outline)
11) Recovery2) Detailed Building
Projects
Damage Survey10) Basic Plan forUrban Recovery3) Strategy forRecovery
4) Enforcement of 1st Building Restriction 8) Enforcement of 2ndBuilding Restriction

1) Brief BuildingDamage Survey5) Urban Area in Limited Period

Process for Urban Recovery(5 Phases/11 Steps)
 Occurrence ~ 1 Week

I. Establishment of Initial Recovery Works
1) Brief Building Damage Survey

 1 Week ~ 1 Month

II. Preparation of Concept for Urban Recovery2) Detailed Building Damage Survey,3) Strategy for Urban Recovery4) 1st Building Restriction5) Urban Area in Limited Period6) Target Area for Recovery 1 Month ~ 6 Months

III. Preparation of Basic Plan for Urban
Recovery7) Basic Plan for Urban Recovery (Outline)8) 2nd Building Restriction
9) Urban Development Plan for Recovery
10) Basic Plan for Urban Recovery

 6 Months ~ 1 Year ~IV. Decision of Contents of Recovery Project11) Recovery Project

V. Implementation of Recovery ProjectLevel of Urban Recovery(Never repeat the disaster damages)

Demarcation of the Role on Urban
Development for Recovery(Responsible for Ward/City Government- Regional Coordination)

Main Body of Urban Development forRecovery(Community-level supporting activities,“Cooperation (=Coping Capacity)”Urban Recovery
Occurrence

Urban Development
Plan for Recovery

StrategySurvey on DamageCondition

Classification ofRecovery Project Area
1) Intensive Recovery
Area2) Recovery PromotedArea
3) Recovery
Recommended Area
4) General Area

Plan
LegalProcedure
Project Area
Methodology
Discussion andConsensus(Community/Consultative Group)～ Disaster Recovery Grand Design ～(Prepared in May 2001)
If a great earthquake hit Tokyo Metropolitan
Area…

After the disaster event, how should we recover
the Area?

Let’s think together about urban development ofTokyo after huge damages by earthquake.

If we suffered by huge damages caused by a great earthquake?

What is the Disaster Recovery
Ground Design
1. To share the Concept for Recovery
2. To promote Urban Visions after Recovery Works
3. To propose implementation measures ofrecovery projects
4. To incorporate into the urban development
plans in ordinary times
5. To prepare in consideration of damage
estimation

How the Recovery Works are conducted?
Occurrence

Immediately

Formulation of a basic framework based on survey on damage
1 WeekRestriction on building to implement safe and comfort urban recovery
Decision of strategy for area-wide recovery by TMG
2 Months

Preparation of recovery plan by Ward/City based on the Strategy
6 Months

Beginning of recovery projects and reconstruction of buildings

Grand Design

1 MonthSymbol of Recovery called “Green Corridor”

Images of the City after Recovery
Works in Suffered Area
The area where is expected to be destructed by fire because of densely
built wooden houses and small & medium business buildings

Images of the City after Recovery
Works in Suffered Area
The area where is expected tobe destructed by fire becauseof densely built wooden houses
and small & medium businessbuildings

Images of the City after Recovery
Works in Suffered Area
District Center near by Railway Station
The area where is expected to be destructed by fire because of densely built
wooden houses and small & medium business buildings

～ Urban Recovery Simulation Drill(Map Exercise) ～(Conducted every year since 1998)
Practice and Investigation of Manual
・ Town Inspection
・ Preparation of Urban Development Plan
for Recovery“Cooperation”• Kogakuin University, Tokyo Metropolitan University• Disaster Recovery Support Organization

Town Inspection(Damage Estimation Survey)

Discussion on Urban Development
Plan for Recovery

Instruction by Experts

Presentation on Prepared Urban
Development Plan for RecoveryMap of Urban Development Plan forRecovery (Completed)

Urban Planning Road
(Sub-arterial No.26)
Urban Redevelopment
Area
Land Readjustment Are
Urban Facilities
Schools
Park (New)
Shopping StreetImplementation of
Urban Development for Recovery
Government
Proposal of Project Area
and Methodology
Discussion/
Agreement(Community/Community
Consultative Group)(Consultative Group)Implementation of
Urban Development for Recovery[Measures of Consensus Building]Community Activities in Ordinal Time
Future Images of the CityDiscussion ⇔Aims to Keep
Agreement Living in
Sustainment of Local
Community
Support by NPO and Experts

Damage Estimation by Earthquake Directly underneath Tokyo(TMG Disaster Management Board, April 2012)
Northern Tokyo Bay Earthquake – The Most Extensive Damages are Expected Earthquake Directly underneath Tokyo with M7.3, epicenter is northern Tokyo Bay• Weekda¥y in Winter, 18:00, Wind Speed is 8m/s
• The depth of epicenter is expected 10km shallower than the former estimation

Seismic Intensity

Damaged Buildings
 Intensity 6 upper in Japanese scale covers 444km2, 70% of  300,000 buildings by totally collapsed or totally
Ward Area• It is increased to 1.5 times larger than the former
estimation of 305km2.

 Intensity 7 is applied for the first time to 7 Wards.
Death 9,700 persons (1.5 times bigger than the former estimationof 6,400 persons)• 5,600 persons (2,900 persons) by building collapse• 4,100 persons (3,500 persons) by fire
• The most damages are occurred in Ota-ward (1,073persons)Liquefaction
 Number of totally/half collapsed buildings: 64,000 buildings• 2.6 times bigger than the former estimation of 25,000buildings.
• 1,100 buildings are totally collapsed, 63,000 buildings arehalf collapsed.

destructed (reduced from 470,000 buildings)• That amount is 10% of the total number of buildingsof 2.82 million buildings in TMG• 116,000 buildings are totally collapsed (127,000buildings)• 188,000 buildings are totally destructed by fire (345buildings)• It is reduced from the former estimation because of
seismic retrofit/non-frammable/rebuild of buildings

Refugees who are difficult to go back to home
 5.17 million persons (increased from the former

estimation of 4.48 million persons)• Of which 1.63 million persons are stayed in therailway stations and out of building.
• In case of East Japan Earthquake in 2011, thesepersons amounted to 3.52 millions and the expected
number is exceeding that amount.

Distribution of Seismic Intensity
By Earthquake Directly underneath Tokyo

Seismic Intensity inJapanese Scale
76 Upper
6 Lower
5Upper
5 Lower
4Below 3

Northern Tokyo Bay Earthquake (M7.3)

Distribution of Totally Collapsed Buildings byExpected Northern Tokyo-bay Earthquake

Number of Totally Collapsed
Wooden Buildings

Distribution of the Number of Destructed Buildings by
Fire by Northern Tokyo Bay Earthquake(Winter Evening, 18:00, Wind Speed: 8m/s)

Number of Destructed
Buildings by Fire

Thank you very much
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