Mount Chōkai (鳥海山, Chōkai-san or Chōkai-zan) is an active volcano located on the border of Akita and Yamagata in the Tōhoku region of Japan, and is 2,236 m (7,336 ft) tall.

Mount Chōkai is a complex stratovolcano made of two old and new newer volcanoes, composed primarily of basalt or andesite.

From the summit, it is possible to see the Shirakami Mountains and Mount Iwaki to the north, Sado Island to the south and the Pacific Ocean to the east.

In the middle of the Edo period the mountain drew many pilgrims and had 33 chapels at its base., with additional routes to its summit opened in the north.

There is also a tradition that the island of Tobishima in the Sea of Japan was originally a part of the summit of Mount Chokai.