Mount Oakan (雄阿寒岳, Oakan-dake) is a stratovolcano located in Akan National Park in Hokkaidō, Japan.

[1] The volcano is made mostly from non-alkali mafic volcanic rock.

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.