Toi Onsen Izu

Toi Onsen Izu is located in the Toi area of Izu City on the Izu Peninsula, Shizuoka Prefecture, in a deep mountain-rimmed bay on the western Izu coast — a historically significant area where the Toi gold mine operated for 400 years during the Edo period, producing gold that partly funded the Tokugawa shogunate and whose Toi Kinzan gold mine museum remains open today as a fascinating glimpse into the heavy industrial geology underlying the peninsula's scenic surface. The chloride-rich coastal hot spring waters of Toi draw from the geothermal resources of the western Izu Peninsula, producing warm saline baths in a setting where rugged coastal scenery, fishing village culture, and volcanic mountain backdrop create one of the Izu Peninsula's most authentically working-coastal hot spring atmospheres. The combination of gold mining history, fresh Pacific seafood from the Suruga fishing grounds, and the therapeutic mineral waters of the western Izu volcanic zone offers visitors an unusually layered industrial, gastronomic, and geothermal experience in one of Japan's most geologically eventful peninsulas.