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Tsunami Disaster Mitigation System in Japan. Bitter Tsunami Experienced Tsunami Warning and Mitigation System Outline of Disaster Management System New Challenges against Tsunamis. 1. Historical Damaging Tsunamis along Japanese Coast (in last 150 years).

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tsunami disaster mitigation system in japan
Tsunami Disaster Mitigation System in Japan
  • Bitter Tsunami Experienced
  • Tsunami Warning and Mitigation System
  • Outline of Disaster Management System
  • New Challenges against Tsunamis

1

slide2

Historical Damaging Tsunamis along Japanese Coast (in last 150 years)

1) The number includes dead or missing from earthquakes.

2) Tsunami generated at far off Japanese coast.

8

tsunami warning system elements

TSUNAMI

WARNING

Tsunami

Signboard

TSUNAMI

WARNING

Tsunami Warning System Elements

Communication & Transmission of Tsunami Warning

to Localities & Civil Defense Authorities

Local government

Central Government

TSUNAMI

WARNING

Radio

TV/Radio Station

TV(Telops, Warning maps)

13

nhk tv screen image
NHK TV Screen Image

showing Seismic Intensity by Miyagi-ken Earthquake on 26 July 2003

within 5 minutes after the Earthquake with/without Tsunami Warnings

15

slide5

Promoting Basic Knowledge about

“TSUNAMI” Disaster

+

Safe Evacuation Route

Early Warning

=

Understanding of Hazardous Areas

Appropriate Risk Awaweness of Local Communities

Safe Evacuation

16

slide7

Pictogram on Tsunami

Tsunami Hazard Area

Tsunami Evacuation Area

Tsunami Evacuation Building

Building for evacuation

against Tsunami.

Safe place/hill for evacuation

against Tsunami.

There is a high possibility to

be flooded in this area

when earthquake occurs.

21

slide8

Sign of Previous Tsunami Height (2)

Inundated level of previous Tsunami

23

tsunami countermeasures taken by local municipalities and communities 1

Tsunami countermeasures taken by local municipalities and communities (1)

Group session on evacuation plan

(Urado-District, Kochi Pref.)

Evacuation drill on Tsunami

(Taro Town, Iwate Pref.)

25

tsunami countermeasures taken by local municipalities and communities 2

Tsunami countermeasures taken by local municipalities and communities (2)

Training for supplying food

(Yawatahama-city, Ehime Pref.)

Check of the dangerous points

(Nansei-Town, Mie Pref.)

26

tsunami countermeasures taken by local municipalities and communities 3

Tsunami countermeasures taken by local municipalities and communities (3)

Drill for disaster management with maps

(Hyga-city, Oita Pref.)

Meeting on the disaster map

(Bungo-Takada-city, Oita Pref.)

27

slide13

Tsunami Hazard Maps

Purpose

  • Identifying and showing vulnerable areas

- Enhancing people’s awareness

・Showing information on disaster risks and evacuation routes, etc.

・Letting residents in coastal areas and visitors know the hazard map through various opportunities

・Tsunami drills

Tsunami Hazard Map(Susaki City)

National Government prepared a guideline for help local authorities to make and use hazard maps.

28

slide15

Japan and its major seacoasts

Chishima Trench

Japan Trench

200 km

400 km

600 km

800 km

1,000 km

Suruga Trough

Seismic areas for reinforcing and promoting disaster reduction measures related to the Tokai, Tonankai and Nankai Earthquakes

Nankai Trough

District (undesignated) for promoting seismic disaster reduction measures related to earthquakes along the Japan Trench and the Chishima Trench

48

possible large scale earthquakes and tsunamis in japan
Possible large-scale earthquakes and tsunamis in Japan

Tokyo Inland EQ

Tokai EQ

Tonankai & Nankai EQ

Japan Trench & Chishima Trench EQs

49

slide17

Estimation of damage caused by possible EQs

(by technical investigation committees of Central Disaster Management Council)

Tonankai

Nankai

EQ

Tokai

EQ

Kobe EQ

1995

(Maximum cases)

9,200

(7,900

by strong tremors)

18,000

(8,600

by tsunamis)

Victims

(persons)

6,436

Houses destroyed

260,000

360,000

105,000

Economic loss

(billion yen)

37,000

57,000

10,000

51

slide18

Earthquake Disaster Risk Reduction Strategy

(formulated by Central Disaster Management Council on 30 March 2005)

Setting an overarching goal

for disaster risk reduction in the next decade

To halve the estimated death toll and economic loss

Tokai EQ

  • Death toll : 9,200 persons → 4,500
  • Economic Loss : 37 trillion yen → 19 trillion yen

☆Strategic goal (ex.)

- Increase the ratio of retrofitted houses : 75% (2003) → 90% (2015)

Tonankai & Nankai EQ

  • Death toll : 17,800 (8,600 by tsunamis) → 9,100
  • Economic Loss : 57 trillion yen → 31 trillion yen

☆Strategic goal (ex.)

- Every municipality at risk is expected to develop hazard maps in 2015

54

communities last resort

Police, Firefighting, Self-defense Force

Families

Neighbors

Communities – last resort

Need to build communities resilient to disasters, including through enhancing public awareness and developing hazard mapping

How the affected people were rescued in case of Great Hanshin-Awaji EQ?

approx. 35,000 persons

23%

77%

55