Sukayu Onsen

Seven hidden hot springs deep in Akita's mountains. Known for milky sulfur waters, Tsurunoyu with its thatched roof is called 'Japan's best hidden spring.' An ultimate onsen experience in nature.

A premier therapeutic hot spring at the base of Mt. Hakkoda, Aomori Prefecture. Renowned for its strong acidic waters, historically used for treating skin conditions and gynecological ailments. Its main bath, 'Hiba Sennin-buro' (Cypress thousand-person bath), is a massive ~50-tatami wood bath carved from 150+ year-old cypress, featuring unique temperature-layered circulation. Winter snow bathing is particularly sublime.

A collective term for six hot spring communities nestled in the northern Hida Mountains near Takayama, Gifu Prefecture. Comprises Shinhotaka, Tochiao, Fukuji, and Shinuhotaka onsen plus three distinctive rotenburo areas. Despite its remote mountain setting, settlements spread along the Kameda River. Particularly beautiful during autumn foliage season, attracting hikers and onsen enthusiasts.

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.

Hokkaido's premier hot spring resort, nicknamed the 'Department Store of Onsen' for its nine different spring types. The Jigokudani (Hell Valley) with rising steam and sulfur scents conveys nature's overwhelming power. Welcoming about three million visitors annually, it excels at hosting international tourists.