Tokuyama Onsen Yamaguchi

Tokuyama Onsen in Shunan city, Yamaguchi prefecture, draws sulfate-calcium thermal waters in the western Chugoku region, where a large industrial port city surrounds a small traditional onsen culture rooted in the therapeutic use of sulfate-rich waters for musculoskeletal and skin conditions. Shunan is located at the eastern gateway to the Yamaguchi prefecture that contains some of Japan's most historically significant and undervisited sites — from the Mōri clan castles that shaped the Meiji Restoration to the extraordinary underground limestone caves of Akiyoshidai. The regional context of Yamaguchi as the political homeland of Japan's modern state founders — including Itō Hirobumi and Yamagata Aritomo — gives this onsen prefecture a historical significance far exceeding its modest size.