| Mount Maru | |
| Other Name: | 丸山 |
| Elevation M: | 691.1 |
| Elevation Ref: | [1] |
| Listing: | List of mountains and hills of Japan by height |
| Translation: | round mountain |
| Language: | Japanese |
| Location: | Hokkaido, Japan |
| Range: | Kameda Peninsula |
| Map: | Japan Hokkaido |
| Label Position: | left |
| Coordinates: | 41.8519°N 141.0919°W |
| Topo: | Geospatial Information Authority 25000:1 尾札部 50000:1 尻屋崎 |
| Type: | stratovolcano |
| Age: | Late Miocene to mid Pleistocene |
| Last Eruption: | 200 thousand years ago |
is an active stratovolcano of the Kameda peninsula. It is located in Hakodate, Hokkaidō, Japan. Mount Maru is also known as to distinguish it from other Mount Maru's and because of its close association with nearby Mount E.
Mount Maru consists of non-alkali, mafic, volcanic rock.[2] The andesitic volcano is topped with a lava dome.
Mount Maru was last active some 200,000 years ago.[3]