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Bakun, W.H. (2005). «Magnitude and location of historical earthquakes in Japan and implications for the 1855 Ansei Edo earthquake». Journal of Geophysical Research110 (B02304 edición). pp. B02304. Bibcode:2005JGRB..110.2304B. doi:10.1029/2004JB003329.Falta la |url= (ayuda)
«東京消防庁<消防マメ知識><消防雑学事典>» [Tokyo Fire Department > Trivia around fire fighting]. tfd.metro.tokyo.lg.jp. Tokyo Fire Department. Consultado el 17 de julio de 2021 – via Sourced by Tokuo Fire Department, from "新 消防雑学事典" (Shin Shōbō Zatsugakujiten) 2nd ed., published by Tokyo Union of Fire Prevention Association (財)東京連合防火協会発行).