Izu Caldera Onsen Region Geothermal Resource Network

A collective name for numerous hot spring resorts scattered across the Izu Peninsula in Shizuoka Prefecture. Over ten onsen including Atagawa, Kawazu, Shuzenji, and Nakaa-Izu offer varying mineral compositions. Volcanic activity produces diverse waters, and has long been beloved by literati and artists throughout Japanese history.

A collective term for multiple hot spring resorts concentrated on the Izu Peninsula, Shizuoka Prefecture. Including Ito Onsen, Atami Onsen, Izu-Nagaoka Onsen, and Shuzenji Onsen, they blend seaside and mountain settings. Predominantly volcanic springs with diverse water qualities, thriving as healing destinations since the Edo period and remaining among Japan's premier tourist attractions.

Geothermal unity among multiple onsen areas on the Izu Peninsula, Shizuoka Prefecture. Shared volcanic geothermal source from the Izu eastern volcanic zone creates individualistic spring communities with varied mineral compositions and temperatures. Operating as a network rather than isolated sites, these springs integrate earth science tourism education with thermal therapy, developing as an advanced caldera landscape tourism model.

Plum gardens and Japanese gardens spread across Atami Onsen in Shizuoka Prefecture. Renowned for its early spring plum festival, it developed a unique tourism format combining hot spring therapy with garden walks. Since the pre-war period, it attracted elite villas and created a luxury onsen resort culture fusing hospitality with garden aesthetics.

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.