Dewa Mountains () is a mountain range that runs north and south on the west side of the Tohoku region of Japan. The mountain range spans Aomori, Akita, and Yamagata prefectures. The Dewa Mountains are split into several sub-ranges by the Yoneshiro River, the Omono River and the Mogami River. These sub-ranges include the Shirakami Mountains, the Tahei Mountains, The Choki Mountains, and the Chotake Mountains.The highest peak of the mountain range is Mount Chokai (2,236m).
The Dewa Mountains are predominately covered with Beech forest. In particular the Shirakawa mountains (Shirakawa-Sanchi) contain the last area of virgin SieboldâÂÂs beech forest - the remnants of a forest which once covered most of northern Japan. In 1993 this forest became one of the first areas in Japan listed as a UNESCO World Heritage Site.
The range is the focal point for the Akinomine (ç§Âã®嶺 "peak of autumn") ritual, which is observed by the Mount Haguro lineage of Shugendà Â.