Mount Yosomi

Mount Yosomi is a lateral volcano in the Usu district on Hokkaido and displays cooled lava flows along with rocky slopes. The surroundings feature barren terrain and rock formations that show the results of volcanic activity.

This lateral volcano formed in 1910 as part of the Usu volcanic complex. The event was a significant geological change for Hokkaido's northern region.

Local residents maintain a connection to Mount Yosomi through seasonal hiking activities and nature observation programs that promote environmental education.

The mountain is reachable via marked walking trails that are open year-round and accessible from the nearby town of Toyako-onsen. Parking areas and signs help visitors navigate the site.

Photographers gather at specific viewing points around Mount Yosomi to capture the interplay of steam vents against the mountain's silhouette at sunrise.

Location: Usu district

Inception: 1910

Elevation above the sea: 252 m

GPS coordinates: 42.56056,140.83583

Latest update: December 12, 2025 09:05