Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Nishino-omote Onsen on Tanegashima Island in Kagoshima Prefecture serves the historic island from which Japan's first firearms were introduced in 1543, when Portuguese traders arrived and demonstrated the harquebus to the island's Tanegashima clan, triggering a revolution in Japanese warfare that would reshape the political history of the archipelago within a generation. The siliceous spring water provides warm, smooth mineral baths on an island better known today as the home of Japan's primary space launch facility, the JAXA Tanegashima Space Center, creating an extraordinary juxtaposition of ancient geothermal bathing culture and cutting-edge space technology in a setting of beautiful subtropical coastline and agricultural lowlands.
Insider tip — Located on Tanegashima, Japan's rocket-launch island south of Kyushu, Nishino-omote Onsen offers volcanic thermal bathing with a view of the Pacific launch corridors used by JAXA. The sulfurous water emerges at around 44°C reflecting the active geothermal belt running through the Nansei archipelago. The island's sugar-cane farmland and pristine beaches make a striking contrast to the high-technology space center 20 km to the south. Ferry connections from Kagoshima allow an overnight island onsen experience.