Tsunami deposits refine great earthquake rupture extent and recurrence over the past 1300 years along the Nankai and Tokai fault segments of the Nankai Trough, Japan

Geochemical characteristics of paleotsunami deposits from the Shizuoka plain on the Pacific coast of middle Japan

“…Paleotsunami deposits from late Holocene were found on the coastal area of the Kii peninsula, Shikoku island, and Kyushu island (Fig. 1; Nankai and Tonankai area; southwest Japan; Okamura and Matsuoka, 2012;Fujiwara et al, 2020;Niwa et al, 2020), as well as in Shizuoka, on the Pacific coast of middle Japan (Tokai area; Fujiwara et al, 2013;Kitamura et al, 2013Kitamura et al, , 2016Kitamura and Kobayashi, 2014). The risk of earthquakes and tsunamis in Tokai-Tonankai-Nankai has been recognized by geologists and geophysicists for a long time (Yoshioka and Hashimoto, 1989;Rydelek and Sacks, 2003;Hori et al, 2004;Baba et al, 2006).…”

“…Paleotsunami deposits during the last ~4000 years have been well surveyed on the Shizuoka plain using cores and outcrops from archaeological sites (Fujiwara et al, 2013(Fujiwara et al, , 2020Kitamura et al, 2013Kitamura et al, , 2020. In addition, paleotsunami deposits have been detected in the Hamamatsu plain and Iwata area, west of the Shizuoka plain (Fujiwara et al, 2013(Fujiwara et al, , 2020Kitamura et al, 2013). Recent tsunami deposits (15th and 19th century) have been also found at the Izu peninsula, east of the Shizuoka plain (Fig.…”

Probabilistic tsunami inundation assessment of Kuroshio Town,Kochi Prefecture, Japan considering the Nankai-Tonankai megathrust rupture scenarios

“…The Tokai segment (E in Figure 1) ruptured synchronously with the Tonankai segments in the past and generated widespread geological evidence of large seismic events (e.g. Fujiwara et al, 2020).…”

“…The Nankai-Tonankai megathrust earthquake and tsunami pose an imminent threat to people living in western and central 25 Japan. Historically, the Nankai-Tonankai Trough hosted major earthquakes (Ando, 1975;Garrett et al, 2016;Fujino et al, 2018;Fujiwara et al, 2020; see Figure 1). The most recent events in 1944 and 1946 ruptured the eastern (Tonankai) and western (Nankai) parts of the trough, respectively, and similar segmented ruptures occurred during the 1854 Ansei earthquakes on December 23 and 24 with 32 hours apart.…”

The processes of isolation of the Japanese main islands based on stratigraphic analysis of both molluscan and foraminiferal fossils, and the history of the Tokai earthquake

“…前後まで移動するので (Hemleben et al, 1989 Fujiwara et al, 2010Fujiwara et al, , 2013Fujiwara et al, , 2020Garrett et al, 2018 Kitamura et al (2020b). The map is modified from the Geospatial Information Authority of Japan (http://maps.gsi.go.…”