| Akaigawa Caldera | |
| Elevation M: | 725 |
| Elevation Ref: | [1] |
| Listing: | Volcanoes in Japan |
| Country: | Japan |
| Subdivision1 Type: | Prefecture |
| Subdivision1: | Hokkaido |
| Map: | Japan#Japan Hokkaido |
| Coordinates: | 43.0833°N 140.8167°W |
| Type: | Stratovolcano |
| Last Eruption: | Pleistocene |
Akaigawa Caldera (赤井川カルデラ, Akaigawa karudera) is a caldera located in Hokkaido Prefecture, Japan. It was active anywhere between 1.7 and 1.3 million years ago.[2]