Mount Shirouma, Alpine summit in Hida Mountains, Japan

Mount Shirouma rises to a rounded rocky summit at 2,932 m, the highest peak of the Ushiro-Tateyama range in the Hida Mountains, on the Nagano–Toyama border within Chūbu-Sangaku National Park. Its slopes carry the Shirouma Dai Sekkei, Japan's largest snow gorge, and a long low lodge with a dark roof and light facade stands just below the top. The ridge is markedly asymmetric, and the summit area holds a first-order triangulation point.

The first documented ascent of Mount Shirouma occurred in 1883, establishing it as a key destination for mountaineering in Japan. This early climb marked the beginning of an enduring tradition of exploration on this peak.

The mountain's name comes from a horse-shaped snow pattern visible on its slopes during spring melt. This distinctive feature has long shaped how local people and visitors perceive and remember the peak.

The main route starts at Sarukura Lodge (1,250 m) in Hakuba and reaches the summit in about six hours via the Shirouma Dai Sekkei snow gorge. Another approach runs from Tsugaike via Hakuba Ooike and Mount Korenge (2,766 m). Two lodges stand near the top, Hakuba Lodge and Hakuba Kousha, and the latter has a tent site.

The summit area including the peak has no prefectural border set for a 700-metre stretch north to south, and Japan Post designates the summit as a place where mail cannot be delivered from outside year-round. A bronze panorama indicator was carried up and installed at the top in 1941.