1454 Kyōtoku earthquake and tsunami
| Local date | 23 November 1454 |
|---|---|
| Local time | Midnight |
| Magnitude | 8.4 Mw |
| Epicenter | 38°30′N 143°48′E / 38.5°N 143.8°E |
| Type | Megathrust |
| Areas affected | Miyagi Prefecture Japan |
| Tsunami | Yes |
| Casualties | Many |
The Kanto and Tōhoku regions of Japan were struck by major earthquake at midnight on 23 November 1454, which triggered a large tsunami that led to many deaths. It had an estimated magnitude of about 8.4 Mw, based on the extent of observed tsunami deposits.