Manza Onsen

Hot spring in Unzen, Nagasaki Prefecture, characterized by volcanically-rich sulfur waters. Developed strong foot bath culture as a therapeutic practice. Historically known since the Edo period as a site of Christian martyrdom, it functioned as a spiritual purification location. Sulfur's medicinal properties for skin conditions contributed to the Meiji period's development of scientifically-validated onsen therapy.

A longstanding public bathing culture in Okukurogane Matsushima Onsen, Fujikawaguchiko, Yamanashi, continuing from the Edo period. Distinguished by vivid yellow sulfur-rich waters, it demonstrates a successful coexistence model between bathhouses and lodging facilities. The infrastructure offers diverse bathing experiences from simple bathhouses to luxury inns. It represents an important regional identity marker for Fuji-area onsen tourism.

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.

A 1,300-year-old hot spring town in northern Hyogo. Seven public bathhouses are scattered along charming willow-lined streets, and the custom of strolling between baths in yukata and geta is the signature experience. Also known as the setting of Shiga Naoya's literary work 'At Kinosaki.'