Omanago Group

The Omanago Group is a mountain massif in the Nikko Mountains of Tochigi Prefecture, reaching approximately 2367 meters in elevation. The peak consists of andesite rock and displays steep slopes shaped by ancient volcanic activity.

The range formed through volcanic processes that built up andesite-rich rock over long periods. These geological features shaped the region's landscape and influenced how communities settled in surrounding areas.

Local communities near the Omanago Group maintain traditional practices of mountain worship, incorporating the peak into seasonal ceremonies.

Hikers can climb during spring through fall on established trails when weather conditions allow safe passage. The best conditions occur during warmer months when snow and ice do not block access routes.

The rock formations allow geologists to examine patterns of volcanic ash and lava deposits from different periods and compare them. These studies help researchers understand the broader volcanic history of the entire region.

Location: Tochigi Prefecture

Elevation above the sea: 2,367 m

Made from material: andesite

Part of: Nikko Mountains

GPS coordinates: 36.79529,139.50710

Latest update: December 11, 2025 11:09