Keywords:the tsunami of the 1605 Keicho earthquake, historical earthquake, historical tsunami
We conducted field survey of the tsunami damaged coast of the Keicho 9 earthquake of February 3rd, 1605 on the coasts of Tokai, Shikoku And Kyushu and tsunami inundation or run-up heights were measured newly at 17 points by using GPS. Tsunami height distribution along Boso Peninsula had been clarified by Tsuji et al(2018). At Nishina, Nishiizu Town, Shizuoka prefecture, sea water went upstream along Nishina River about 1.4 km from the river mouth and run up height was estimated at 8.9 meters above mean sea level. At Hashimoto in Arai Town, Kosai City, Shizuoka prefecture, 80 houses out of 100 houses were swept away, and tsunami height was 8.2 meters. At Shirasuka, a post town of Tokaido houses were swept away and severel people, horses, and cows were killed, and tsunami height was 9.4 meters. At Horikiri village, Tahara city, near the to of Atsumi Peninsula, Aichi preffecture, all fishing ships were wrecked but no house and human damage took place, and height was estimeted at 3 meters. At Sakihama, Muroto city, Kochi prefecture, sea water rose up to the entrance step stone of the main building of Dainichiji temple, and tsunami height was 14.4 meters. Coastal villages near cape Muroto, about 400 people were killed due to the tsunami. At Saga, Kuroshio Town, documents given by Lord Motochika Chosokabe was lost in Sakamoto's house, where tsunami height was estimated at 6.2 meters. At Misaki, in Tosashimizu city, 153 peoples were killed due to the tsunami, and tsunami height was estimated at 8.1 meters. Tsunami height distribution is illustrated in the figure.
This research was supported by MEXT (“Research project for compound disaster mitigation on the great earthquakes and tsunamis around the Nankai Trough region”).