Kawaguchiko Onsen Mount Fuji-View Outdoor Baths

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 hot spring resort in Nozawa Onsen Village, Nagano Prefecture, featuring the historic 'Thirteen Baths'—communal facilities since the Edo period, still maintained by locals. Numerous free outdoor baths scattered throughout allow casual access to hot springs. Also renowned as a ski resort, winter snow bathing experiences attract many visitors seeking immersion in snowy mountain settings.

A hot spring resort in Fujikawaguchiko, Yamanashi Prefecture, positioned on Mount Fuji's northern slope with views of the mountain across the lake. Each season offers distinct vistas—spring greenery, summer blue, autumn foliage, and winter snow—attracting many visitors. Excellent views from onsen inns make the experience of contemplating Mount Fuji from outdoor baths highly valued.

A bath-hopping tradition formed by 13 municipal public baths in Nozawa Onsen Village, Shimotakai, Nagano Prefecture. Developed as a free communal system for villagers since the Edo period, also known as a winter ski resort. Outdoor bath culture is strong, with thermal springs experienced amid natural scenery. It exemplifies coexistence between locals and tourists in onsen communities.

A hot spring city boasting the highest volume of spring water in Japan. Known for its 'Beppu Hatto' — eight distinct onsen areas — and 'Jigoku Meguri' (Hell Tour), the city has roughly 2,300 individual springs. Diverse tourism experiences leverage these thermal resources in creative ways.

One of Japan's 'Three Great Hot Springs' in Gunma Prefecture. Roughly 4,000 liters of hot spring water gush per minute from the Yubatake (hot water field), and unique bathing customs include yumomi (water stirring) shows. It consistently ranks among Japan's most popular onsen destinations.