Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Ishikari, at the mouth of the Ishikari River where it flows into the Sea of Japan north of Sapporo, is famous for its extraordinary Ishikari nabe — a warming salmon and vegetable miso hot pot unique to Hokkaido cuisine whose bold miso-and-butter broth, thick salmon chunks, and root vegetables create the definitive taste of Hokkaido winter comfort food enjoyed at the fishing village restaurants of the Ishikari rivermouth. Ishikari Onsen Hokkaido draws on chloride-rich coastal thermal waters from the marine geological formations of the Ishikari Bay coastline, offering warming maritime baths in a salmon fishing port community whose river delta culture, traditional Ainu settlement heritage along the Ishikari River, and the coastal scenery of the Sea of Japan create a flavorfully distinctive spa setting with a deeply Hokkaido character. The Ishikari salmon fishing heritage and nabe hot pot restaurant culture, the Ishikari River delta wetlands important for migratory birds, and the traditional Ainu cultural heritage of the Ishikari River basin — the longest river in Hokkaido and one of Japan's three great rivers — create a richly natural and culinarily distinctive spa destination on the Hokkaido Sea of Japan coast.
Insider tip — At the mouth of the Ishikari River where Hokkaido's longest waterway meets the Sea of Japan, Ishikari's onsen captures sodium-chloride waters with a mild briny quality reminiscent of the nearby coast. The flat delta landscape here, shaped by centuries of river flooding and salmon fishing, gives the onsen a very different character from Hokkaido's mountain hot springs. Local fishermen have traditionally used the baths to warm up after working the cold Ishikari estuary. The combination of sea air, river views and warm saline baths is both grounding and restorative.