Namerikawa Onsen Toyama
- Location
- Namerikawa, Japan
- Water type
- sodium chloride
- Temperature
- 41 °C
- pH
- 7.1
Water profile
Relaxing — deep, immediate muscle release.
Loaded with major ions — the essential minerals (Ca, Mg).
Dense, salty water — you float without effort.
Namerikawa Onsen is a coastal hot spring in Namerikawa city, situated on the shores of Toyama Bay in Toyama Prefecture, renowned as the world's premier location for observing the spectacular spring migration of firefly squid, which mass in the bay's shallow waters and produce vivid bioluminescent displays visible from shore. The chloride-rich mineral waters provide deep body warming and skin-nourishing benefits, offering a restorative complement to the unique natural phenomenon that draws visitors from across Japan and the world to Namerikawa's fishing harbor each March through June. The combination of the glowing sea at night and the mineral warmth of the thermal spring creates a singularly magical coastal spa experience.