| Mount Oakan | |
| Elevation M: | 1370.4 |
| Listing: | List of mountains and hills of Japan by height |
| Location: | Hokkaidō, Japan |
| Range: | Akan Volcanic Complex |
| Coordinates: | 43.4517°N 144.1647°W |
| Topo: | Geographical Survey Institute 25000:1 雄阿寒岳 50000:1 阿寒湖 |
| Map: | Japan#Japan Hokkaido |
| Type: | Stratovolcano, Lava dome |
| Age: | Late Pleistocene-Holocene |
| Volcanic Arc/Belt: | Kuril arc |
| Last Eruption: | 2008 |
is a stratovolcano located in Akan National Park in Hokkaidō, Japan.
Mount Oakan sits in the Akan caldera northeast of Lake Akan. The volcano rises some 900m (3,000feet) above the surrounding terrain. The top of the volcano is 1370m (4,500feet) above sea level. The volcanic cone is some 8km (05miles) in diameter. There are three explosion craters at the summit. At at about 800m (2,600feet), there is a fumarole. The volcano is made mostly from non-alkali mafic volcanic rock. The main rock type is andesite and dacite.
Mount Oakan emerged in the Late Pleistocene dropping pumice on Minamishikata. After that, continuous lava flows formed the bulk of the volcano. In the final stages of its life, a parasitic volcano formed a lava dome at the summit.[1]
According to its name and local legend, Mount Oakan is the male counterpart to Mount Meakan on the other side of Lake Akan.[2]