| Mount Aka | |
| Other Name: | 赤岳 |
| Elevation M: | 2078.5 |
| Prominence M: | 8.5 |
| Parent Peak: | Mount Koizumi |
| Listing: | List of mountains and hills of Japan by height |
| Translation: | red peak |
| Language: | Japanese |
| Pronunciation: | pronounced as /ja/ |
| Location: | Hokkaidō, Japan |
| Range: | Daisetsuzan Volcanic Group |
| Map: | Japan |
| Coordinates: | 43.6744°N 142.9267°W |
| Topo: | Geographical Survey Institute 25000:1 層雲峡 50000:1 大雪山 |
| Type: | Stratovolcano |
| Volcanic Arc/Belt: | Kurile arc |
is a stratovolcano located in the Daisetsuzan Volcanic Group of the Ishikari Mountains, Hokkaidō, Japan.