Ikaho Onsen

One of Japan's premier hot spring resorts in Kusatsu, Gunma Prefecture. With over 32,300 liters per minute of natural spring water, it boasts Japan's highest output. The resort centers on the yubatake hot water field, and the traditional yumomi practice of cooling hot water with wooden paddles is famous. Its strongly acidic waters have high bactericidal properties.

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.'

One of Japan's 'Three Great Hot Springs' alongside Arima and Kusatsu. Its smooth alkaline simple spring water is renowned as a 'beauty bath.' The hot spring town along the Hida River features foot baths and a free open-air spring. The rustic charm of the Hida mountain village adds to its appeal.