Meiwa tsunami on Ishigaki

The source entry likely confuses 1771 with 1971: the Meiwa tsunami struck Ishigaki on April 24, 1771. A historical chronicle records a run-up of about 85 m, but this is considered an overestimate; geological studies and modeling support a maximum run-up of roughly 25–35 m. This is the height reached by water on land (run-up), not the height of an offshore wave.