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Regional Vulnerability of the Tokyo Metropolitan Area to Flood and Earthquake Disasters

  • Sotaro TsuboiEmail author
  • Chisato Asahi
Part of the New Frontiers in Regional Science: Asian Perspectives book series (NFRSASIPER, volume 4)

Abstract

Until the 1970s, the majority of flood disasters occurred in the lowlands to the east of Tokyo. In recent years, however, with the increasing frequency of localized torrential downpours – referred to as ‘guerrilla rainstorms’ – locally concentrated, devastating damages have been suffered. With respect to measures against such damages, underground reservoirs and rivers are being constructed. As a soft measure, flooding hazard maps are being made public. Because of its densely concentrated urban structure, the Tokyo Metropolitan Area is also at high risk of fires and building collapses during earthquakes. Furthermore, a large-scale earthquake is expected to occur there in the near future. As mitigation measures, earthquake-proof reinforcement is being subsidized and disaster prevention activities and education are being conducted by community organizations. Although a variety of disaster prevention measures against floods and earthquakes are being conducted in the Tokyo Metropolitan Area, lowland areas could still suffer serious damage due to their densely concentrated urban structure. Since disasters affect society as a whole, vulnerability can be defined not only by such urban structure and mitigation measures, but also by the pre-disaster welfare state of individual households, capacity of administrative bodies and cooperation within them. Thus, we should clarify the respective roles of affected individuals, areas, and administrative bodies so that they complement each other. However, even administrative responses to disasters (rescue and assistance) have limits. Therefore, individuals should be prepared to protect their own lives and assets (self-help) and respond cooperatively in collaboration with their neighbours.

Keywords

Tokyo metropolitan area Earthquake Flood Self-help Resilience Mitigation Community Hazard map 

References

  1. Bureau of Urban Development Tokyo metropolitan government. (2010). Summary of propulsion plan for creation of disaster-proof Districts (Bousai Toshi Zukuri Suishin Keikaku). (in Japanese).Google Scholar
  2. Bureau of Urban Development Tokyo metropolitan government. (2013). Survey report of degree of regional risk 7th (Jishin Ni Kansuru Chiiki Kikendo Sokutei Chousa). (in Japanese).Google Scholar
  3. Expert Examination Committee on Countermeasure for Great Flood, Central Disaster Prevention Council. (2010). Special committee report: Inundation of metropolis, countermeasures for damage mitigation (Daikibo Suigai Taisaku Ni Kansuru Senmon Chousakai Hokoku Shutoken Suibotsu- Higai Keigen No Tameni Torubeki Taisaku Towa). (in Japanese).Google Scholar
  4. Expert Examination Committee on Countermeasure for Near Field Earthquake of Metropolis, Central Disaster Prevention Council. (2005). On the results of damage estimation (Higai Soutei Kekka Ni Tsuite). (in Japanese).Google Scholar
  5. Miyamura, T. (1985). The flood disaster (Suigai), Tokyo: Chuko Shinsho 786. Chuo Kouronsha. (in Japanese).Google Scholar
  6. Miyata, T. (1969). Variation and runoff and flood damages caused by urbanization in the Shakujii River Basin Tokyo. Geographical Review of Japan (Chirigaku Hyouron), 42–10, 667–680 (in Japanese).CrossRefGoogle Scholar
  7. Moroi, T., & Takemura, M. (2002). Re-evaluation on the damage statistics of wooden houses for the 1923 kanto earthquake and its seismic intensity distribution in and around Southern Kanto District. Journal of Japan Association of Earthquake Engineering, 2(3), 35–71.CrossRefGoogle Scholar
  8. Nakabayashi, I. (2005). Planning of disaster proof city: Community development for disaster prevention and reconstruction in Science for City (Toshi No Kagaku) (pp. 149–176). Center for Urban studies, Tokyo metropolitan University Press. (in Japanese).Google Scholar
  9. Nakabayashi, I. (2010). National wide regional improvement for mitigation from huge earthquake disaster, basic issue for mitigation from the next Tokyo earthquake. Journal of Economics, 242, 24–40 (in Japanese).Google Scholar
  10. Nakano, T. (1963). Land areas below sea level in Japan (Nihon No Zerometoru Chitai). Tokyo: University of Tokyo Press. (in Japanese).Google Scholar
  11. Okuma, T. (1981). Historical change of flood control of the TONE river and flood disaster (Tonegagawa Chisui No Hensen to Suigai). Tokyo: University of Tokyo Press. (in Japanese).Google Scholar
  12. Takahashi, H. (1971). Metamorphosis of National Land and Flood disaster (Kokudo No Henbo To Suigai), Tokyo: Iwanami Shinsho 793. Iwanami shoten. (in Japanese).Google Scholar

Copyright information

© Springer Japan 2016

Authors and Affiliations

  1. 1.Disaster Reduction and Human Renovation InstitutionKobeJapan
  2. 2.Division of Urban Policy, Faculty of Urban Liberal ArtsTokyo Metropolitan UniversityHachioji, TokyoJapan

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