2013.3.11

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 Feb.21,2013
 1854 Ansei Nankai Earthquake Tsunami Hit 'The Water Metropolis of Osaka'. 
   Monument Warns of the Next Nankai Earthquake Tsunami.

Takeshi Nagao

Epilogue


 Epilogue  

 About 30 years ago I passed by the Taisho Bridge and found a big, grey rectangular, stone memorial. The inscription stated that tsunamis had hit Osaka and caused serious damage. At that time I did not know about tsunamis had hit Osaka, despite having grown up in Osaka City. On Dec.26th, 2004, a large tsunami hit the coasts around the Indian Ocean; it was the first time for me to watch a terrible tsunami disaster on television. I remembered the memorial by the Taisho Bridge and went to see it and reread the inscription.
 My study of the Ansei Nankai earthquake tsunami began by copying the memorial's inscription, sitting for a while in front of the memorial in the winter sun. The inscription says that when the earthquake hit, many people fled into boats to escape. After a while, the tsunami rushed into Osaka Bay; large ships anchored at the mouths of two rivers were carried up canals in Osaka City, where they destroyed bridges and many smaller boats. Consequently, many people boarding the boats died.
 It says "Always be careful of a tsunami when a big earthquake occurs, and don't try to escape into boats."
 The people that experienced the Ansei Nankai earthquake tsunami regretted that they had not learned the lessons of the Hoei earthquake tsunami. They built the monument not only as a memorial but also to teach future generations of this fearful tsunami and to warn them to take precautions against the next Nankai earthquake. People living in Saiwaicho have preserved the memorial and still hold a memorial service during the Bon festival in August every year.
 We should learn from past disasters and also presume that new disasters will occur. In modern times, Osaka City has expanded and developed. The lowland has become densely populated and, what is worse, the land has seriously subsided. If a tsunami hits Osaka in the future the damage will be more serious than that of the Edo era. We should anticipate different disasters from the Edo era and take precautionary measures accordingly.
 While writing this article, foreign language teachers helped with my English translations from Japanese. Without their kind help, I could not have completed this article. I am deeply grateful to them.
Assistant English translators: Todd Meyers, Chie Mori, Brendan Hurley, Simon Oetle, Erika Luley, Robyn Smith, Emily Long, Reena Redcar, Tony Malloy, Jonathan Brown, Jeremy Larsen.


 References   

*Earthquake Research Institute Of The University of Tokyo (Editor) (1986): Shinsyu Nihon Jishin shiryo (New Collection of Historical Documents on Earthquakes in japan ), supplementary vol. 5-1, 1438pp. (in Japanese)
*Isedo, S. (1983): Ohtsunami no Hi (The Memorial of the Big Tsunami), Osaka shunjyu, 36, 105-111. (in Japanese)
*Katsuhiko Ishibashi (2004): Status of historical seismology in Japan, ANNALS OF GEOPHYSICS, VOL. 47,N, 2/3, April/June 2004, 339-368. (in English)
*Kuroha, H. (Editor) (1976): Osaka Hennenshi (The chronicle of Osaka) , 22, The Central Library of Osaka City, 428pp. (in Japanese)
*Musha, K. (Editor) (1951): Nihon Jishin Shiryo (Historical Documents on Earthquakes in Japan), The Mainichi News Papers Co.,1119pp. (in Japanese)
*Nagao, T. (2012 a): Daijishin Ryokawaguchi Tsunamiki ni miru Osaka no Tsunami to sono Kyokun (The Lesson learned from Tsunamis in Osaka Referred to the Memorial'The Record of the Great Earthquakes and the Tsunami at the Mouths of the Two Rivers'), Historical Disaster Studies in Kyoto, 13, Kyoto Society of Historical Disaster, 17-26. (in Japanese with English abstract)
*Nagao, T. (2012 b): Suito Osaka wo Osotta Tsunami (Tsunamis Hit The Water Metropolis of Osaka), Revised edition, Nagao Takeshi, 528pp, English abstract 40pp.
*Nishiyama, A.(2004): Ansei Nankai Jishin (1854) niokeru Osaka deno Shinsai Taio (People's reaction in Osaka to disaster from the 1854 Ansei Nankai earthquake), Historical Earthquakes, 19, Society of Historical Earthquake Studies,116-138 . ( in Japanese)
*Oda, Y. (1995): Osaka ni okeru Ansei no Jishin Tsunamihi to Sinsai no Kiroku, Historia, 148, Osaka Historical Association. 91-95. (in Japanese)
*Sangawa, A. (2007): Jishin no nihonshi, Chuokoron shinsya,268pp. (in Japanese)
*Usami, T. (2003): Nihon Higai Jishin Soran (Materials for Comprehensive of Destructive Earthquakes in Japan), The latest edition, University of Tokyo Press, 605pp. (in Japanese)


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