The devastating eruption of Oshima–Ōshima began on 18 August 1741 and ended on 1 May the next year. Eleven days into the eruption, the Kampo tsunami with estimated maximum heights of over 90 m (300 ft) swept across neighboring islands in Japan and the Korean Peninsula. The eruption and its resulting tsunami killed at least 1,400 people. Damage was extreme along the coast of Japan, while in Korea, the tsunami damaged fishing boats.
Key Facts
| Subject | 1741 eruption of Oshima–Ōshima and the Kampo tsunami |
| Category | Volcanic eruption and tsunami off the coast of Hokkaido |
| Reading time | 1 min · Advanced |
| Key date | 1741 |