Izu Caldera Hot Spring 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 hot spring region spread across Aso and Minami-Aso villages in Kumamoto Prefecture. Located at the base of Mount Aso, which has one of the world's largest calderas, it offers hot springs amid vast grasslands and volcanic landscapes. Features mixed simple and sulfur waters with diverse mineral content. The fusion of majestic nature and onsen captivates visitors.

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.

Collective geothermal region of multiple hot springs distributed across the caldera topography of Izu Peninsula, Shizuoka: Izuyama, Izunagaoka, Shuzenji, and others. Unified geological geothermal resources form independent onsen towns. From Edo period, recognized as a unified 'hot spring zone' through geographic knowledge systems. Connection with modern geology creates intersection of onsen and volcanology knowledge. Tourism consciousness emphasizes underground physical connections over surface network integration.

Hot springs in Aso, Kumamoto Prefecture, uniquely utilize geothermal energy from volcanic activity. The geothermal resources within Aso Caldera rank among Japan's largest, serving both spring supply and geothermal power generation. It represents an important fusion of geological value and onsen culture.