Mount Zaō

Zaō is a volcanic massif on the border between two prefectures in northern Japan, made up of several cones and lava domes. On the central peak lies a round crater lake with turquoise blue water, surrounded by steep walls of ash and rock.

The volcanic peaks formed over millennia through successive eruptions that built up layers of lava and ash cones. The last activity occurred in the mid-20th century and left visible traces on the slopes and around the crater.

The peaks have served as a place for spiritual exercises by monks for centuries, and pilgrims still walk here today to perform rituals. Hikers often encounter small shrines and prayer flags along the trails, which testify to the religious roots of the region.

The approach is via cable cars or hiking trails, with different equipment needed depending on the chosen route. In winter, one should wear warm clothing and non-slip boots, as snow and ice cover the paths.

The crater lake changes its color between green, gray and blue depending on the light and acidity of the water. In the cold season, trees transform into white sculptures through freezing water, rising like ghosts from the snow.

Location: Miyagi Prefecture

Location: Yamagata Prefecture

Elevation above the sea: 1,841 m

Part of: 100 Famous Japanese Mountains

Address: Mount Zaō, Zaoonsen, Yamagata, 990-2301, Japan

GPS coordinates: 38.13645,140.44947

Latest update: December 13, 2025 19:51