Mount Gassan

Mount Gassan is a stratovolcano in Yamagata Prefecture rising 1,984 meters (6,509 feet) above sea level and forming part of the Dewa Sanzan mountain range. The climbing routes traverse rocky sections, wooden boardwalks, and alpine meadows crossed by snowfields that persist well into summer.

A shrine was built on the summit between 712 and 773, making this site the oldest documented religious location in the Dewa Sanzan region. Ascetics and pilgrims sought the mountain over centuries to practice spiritual exercises in the isolation of the high slopes.

The peak honors Tsukiyomi, the moon deity, and hikers pass through several shrines built by mountain ascetics over centuries as they approach the summit. Visitors take part in purification rituals and often wear white garments while following paths once reserved for spiritual pilgrims.

The hiking season runs from July 1 to September 15, and the ascent covers 5.5 kilometers (3.4 miles) with steep sections requiring sturdy footwear. Fog and sudden weather changes are common at higher elevations, so bring warm clothing even in midsummer.

The summit area retains snowfields well into midsummer, allowing skiing from April through July while other mountains in the region are already free of ice. Some hikers bring skis and combine the pilgrimage with descents through the spring snow cover.

Location: Tsuruoka

Location: Shonai

Location: Okura

Location: Nishikawa

Location: Yamagata Prefecture

Elevation above the sea: 1,984 m

Part of: Three Mountains of Dewa, 100 Famous Japanese Mountains, Hana no Hyaku Meizan, New 100 Famous Flower Mountains, 100 Famous First Order Triangulation Station Mountains, New 100 Famous Japanese Mountains, 100 Famous Tōhoku Mountains, 100 Famous Yamagata Mountains

Website: http://dewasanzan.jp/en/publics/index/27

GPS coordinates: 38.54869,140.02684

Latest update: December 13, 2025 19:49