Senninkaku

葛温泉 仙人閣

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Lodging
Chubu·Nagano

Capabilities

Mixed BathingYes

Shared bathing area for all genders

Programs

About

A hitou (秘湯, hidden hot spring) inn in the Kuzu valley near Omachi in the Northern Alps, belonging to the Nihon Hitou wo Mamoru Kai association. The outdoor bath draws from a soft alkaline spring (pH 9.4) that warms you through slowly and stays with you well after you get out. There's also a rock bath between the indoor and outdoor pools.

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Onsen Oni

Last updated June 9, 2026