Minobucho Minobu Mineral Spring (Hidden Hot Spring)

An open-air bath culture exemplified by nine remote mountain onsen inns in the Oku-Okhotsk valley, Nikko, Tochigi. These intimate facilities offer rustic rotenburo seamlessly integrated with nature. Guests experience bathing amid snow in winter, cherry blossoms in spring, and autumn foliage—embodying Japanese onsen aesthetics. Its difficult access preserves its character as a hidden gem in serene wilderness.

A hot spring resort on the shores of Lake Kawaguchi in Fujikawaguchiko, Yamanami Prefecture. Renowned for stunning views of Mount Fuji, with lakeside ryokan established since the early Showa period. Features alkaline simple hot spring waters known for skin-softening properties. Serves as a major gateway for Mount Fuji tourism.

A unique combination of thermal springs and Mount Fuji views in Fujikawaguchiko, Yamanashi Prefecture. Many ryokan outdoor baths offer Mount Fuji vistas, creating an experience of feeling both mountain coolness and thermal warmth simultaneously. Touristification began in the mid-Showa period, forming fusion tourism culture of Fuji worship and thermal therapy. Recognized domestically and internationally as exemplary integration of mountain scenery and hot springs.

A hot spring resort in Fujikawaguchiko, Yamanashi Prefecture. Characterized by scenic views of Mount Fuji from lakeside rotenburo. It offers a unique tourism experience combining Mount Fuji worship with hot spring use. The fusion of Fuji's landscape resources and hot springs has become a model for onsen resorts nationwide.

Lake Kawaguchi Onsen in Fujikawaguchiko, Yamanashi Prefecture, is renowned for its fusion of hot spring bathing and Mt. Fuji scenery. Many facilities feature open-air baths designed for viewing Mount Fuji, merging visual landscape experience with thermal therapy. It exemplifies commercialized rotenburo culture.

A small hot spring resort in Yamanouchi, Nagano Prefecture. Featuring approximately 80 traditional inns, it is known for its unique 'yumeguri' tradition where guests bathe in nine public bathhouses. Renowned for its old-fashioned charm and rustic atmosphere, it attracts many backpackers and younger tourists seeking an authentic onsen experience.