It triggered a large tsunami that caused serious damage along the coast of Wakayama Prefecture and the Tōkai region.

[5] There was severe damage from the earthquake on the eastern side of the Kii Peninsula particularly in the cities of Shingū and Tsu.

[6] The observed teleseismic response and tsunami records have been matched using a rupture area of 220 x 140 km and a maximum displacement of 2.3 m.[7] It has been suggested that splay faults, linking back into the plate interface, had an important role in generating large tsunamigenic earthquakes along the Nankai trough.

Run-ups in excess of 5 meters were also recorded at several locations along the coasts of Mie and Wakayama Prefectures.

The tsunami was observed along the Pacific coast of Japan from Izu Peninsula to Kyushu, and recorded by tide gauges from Alaska to Hawaii.