Mount Maru (Esan)

 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.
Geology.
Mount Maru consists of non-alkali, mafic, volcanic rock. The andesitic volcano is topped with a lava dome.
Eruptive history.
Mount Maru was last active some 200,000 years ago.