Relaxing — deep, immediate muscle release.
Loaded with major ions — the essential minerals (Ca, Mg).
Dense, salty water — you float without effort.
Toyako Onsen Manseikaku Hotel overlooks the stunning caldera lake of Tōya in southern Hokkaido — a UNESCO Global Geopark and one of Japan's most geologically active volcanic landscapes — where chloride-rich volcanic hot springs emerge near the lakeshore in a setting of exceptional natural drama and scientific significance. The Manseikaku, one of the oldest and most distinguished ryokan on Lake Tōya's shore, channels the volcanic spring water into lakeside rotenburo and indoor baths with sweeping panoramic views across the circular caldera lake to the active Shōwa-Shinzan lava dome, which erupted spectacularly in 1944–45 and continues to steam visibly from its summit. The lake's shores bear the permanent marks of the dramatic 2000 eruption of Usu volcano — preserved as a geopark exhibit where lava flows buried roads and buildings now shown as geological monuments — reflecting the deep geological dynamism of this remarkable Hokkaido volcanic landscape. Combining geological wonder, caldera lake panoramas, exceptional Hokkaido kaiseki cuisine, and the intimacy of a distinguished lakeside ryokan tradition, Toyako Onsen Manseikaku offers one of southern Hokkaido's most complete and atmospheric onsen experiences.