Mount Sentsū, also known in English as Sentsūzan, is a mountain located on the border of Nichinan, Tottori Prefecture and Okuizumo, Shimane Prefecture. Mount Sentsū has an elevation of 1,142 m (3,747 ft) and is one of the highest peaks in the Chūgoku Mountain Range and part of the Hiba-Dogo-Taishaku Quasi-National Park. Mount Sentsū was historically on the border of the ancient provinces of Hōki Province and Izumo Province. The base of Mount Sentsū is primarily composed of granite. This granite is a rich source of iron sand, and the mountain was historically known as a source for this material.