December 23, 1854 Tsunami: Enshunada Sea, Japan

Reference #150:

1854, Dec 23 [Nov 4, 9 am, Ansei 1 (Japanese calendar)].

20-21m high tsunami at Osatsu, Shima Penin. About 1,000 deaths, 8,300 houses destroyed and washed away in total. Ground upheaved 1.2m at Omaezaki, 2m at Shimizu in Shizuoka Pref.

Reference #237:

About nine a.m. local time a magnitude 8.3 earthquake in Tokkaido, Japan, created a local tsunami 21 meters high at Oatsu, Shima Peninsula, Japan. The earthquake and tsunami destroyed 8,300 homes and killed 1,000 people.

Reference #414:

The tsunami appeared along the entire coast from the Boso Peninsula in the east to Tosa Bay in the west; less strong waves reached the eastern shore of Honshu Island and the southeastern coast of Kyushu Island. About 300 people died in the earthquake and about the same number died in the tsunami However, it is possible that the real number of victims was greater. The damage done by the earthquake and tsunami has not been exactly established.

Reference #13335:

The time expression of the earthquake, however, should be interpreted not as being exactly 9:45 but between 9:45 and 9:59, due to the time announcing system used on board the ship [...] the origin time of the tsunami was estimated to be approximately 9:46 in local time at Shimoda. This result overlaps with the 15 minute window from 9:45, recorded as the time of the earthquake in the logbook [...] The time of 9:46 corresponds to the range between approximately 9 a.m. and 10 a.m. observed in Japanese diaries written in Shimoda. Muragaki recorded the closest time to 9:46 among them. As mentioned previously, he stated that a big earthquake had occurred just before 10 a.m. More precisely, under the timekeeping system at that time, which divided daytime and nighttime into six equal parts respectively, the time expression in his diary should be understood to be just before 9:53, based on dawn and dusk on that day in Shimoda. This is consistent with the time of the earthquake, known from the logbook and tidal records