July 765 Tsunami: Kyushu Island, Japan

Name: July 765 Tsunami: Kyushu Island, Japan
Location: Kyushu Island, Japan

July 765 · Erroneous entry

A tsunami caused by a volcano began at Kyushu Island, Japan in July 765.

Where the waves reached

The source of the tsunami. No runup with a place is recorded for it.

Under 1 m
1 to 3 m
3 to 10 m
10 to 30 m
30 m and more
Height not recorded

Tsunami warnings in force

The tsunami

Date: July 765
Source: Kyushu Island, Japan
Cause: Volcano
Runups recorded: 0
Waters: Ocean
How certain: Erroneous entry

The toll

The record gives no deaths, injuries or damage for this tsunami.

What the record says

NCEI’s account, from the sources it cites.

765?, July?. There was a volcanic eruption and short-period

tremors on Kyushu Island, north of Kagoshima Bay (Osumi Peninsula) at Shinzoshinto. According to some chronicles, the island subsided. People were washed away. This probably refers to a mud flow, and not to a tsunami. (reference #414)

Note: This probably refers to the July 766 event.

Every tsunami in 765 The 700s Tsunamis of Japan Alerts in force

Sources

Tsunami events and runups from NOAA’s National Centers for Environmental Information, Global Historical Hazard Database, cited as NCEI/WDS, doi:10.7289/V5PN93H7. Public domain. Read 2026-09-24. NCEI tsunami event 5457.