there were two other very large earthquakes: the 1854 ansei-tōkai and ansei-nankai earthquakes. the 1707 was stronger than both. several observations show that the hōei earthquake was bigger. at cape muroto, kōchi, a cliff was raised up about 2.3 m in 1707, but just 1.5 m in 1854. in the kawachi plain area, the earthquake was around 6 - 7 on the jma scale. also, the amount of damage and height of the water from tsunami showed the strength of the earthquake. there are also records of tsunami at distant locations, such as nagasaki and jeju-do, south korea.