Mount Ōshiromori

Mount Ōshiromori reaches 1,216 meters (3,990 feet) and straddles the border between Iwate and Akita Prefectures. Multiple hiking trails wind through forests and natural terrain, offering different routes to the summit.

The mountain has served as an administrative boundary between Iwate and Akita Prefectures since Japan's modern prefectural system was established. This border role shaped its geographic significance over time.

The mountain holds a place among 100 Famous Tōhoku Mountains, giving it recognition within Japan's outdoor community as a regional natural landmark. People who hike here connect with the broader network of celebrated peaks across northeastern Japan.

The summit is accessible from multiple starting points in both the Shizukuishi and Semboku areas. Marked trails and local transportation options make reaching the base straightforward for most visitors.

The name written as 大白森 translates to 'Great White Forest,' a reference to the vegetation and appearance visible on its slopes. Most visitors pass through without knowing this poetic connection between the peak's name and its landscape.

Location: Shizukuishi

Location: Semboku

Elevation above the sea: 1,216 m

Part of: 100 Famous Tōhoku Mountains

GPS coordinates: 39.84195,140.78506

Latest update: December 14, 2025 18:40