Bentenjima Onsen

Hamamatsu, Shizuoka, Japan

Location: Hamamatsu, Shizuoka, Japan
Water type: sodium chloride
Temperature: 40 °C
pH: 7.3

Water profile

Thermicity

Sedative

40 °C

LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation

Restorative

LowHigh

Loaded with major ions — the essential minerals (Ca, Mg).

Buoyancy

Effortless float

LowHigh

Dense, salty water — you float without effort.

SodiumChloruresBrome

Bentenjima Onsen takes its evocative name from Benzaiten, the Japanese goddess of water, music, and good fortune — one of the Seven Lucky Gods of Japanese tradition — whose presence is invoked by the island or sacred site associated with this spring, connecting the act of thermal bathing to an ancient cultural practice of veneration at naturally occurring water sources. The spring emerges from the volcanic geology of Japan's thermally abundant archipelago in a setting whose dedication to this deity of fortune links geothermal water, divine blessing, and the healing warmth of the earth within a single place of natural and spiritual significance. Bentenjima Onsen embodies the deeply layered Japanese tradition where the rising of thermal water from the earth is understood not merely as a geological phenomenon but as a manifestation of sacred generosity, inviting bathers into an encounter with both the physical warmth and the spiritual resonance of a blessed natural spring.

Insider tip — Bentenjima Onsen sits on the shore of Lake Hamana in Hamamatsu — a brackish lagoon famous for eel and oyster farming, connected to the Pacific and renowned for its seafood and mild climate. The sodium-chloride coastal springs serve a resort area on the lake whose warm waters and abundant seafood have made it a popular getaway, in a region of Shizuoka where the musical-instrument industry (Yamaha, Kawai) and the bounty of Lake Hamana define a prosperous and distinctive central Honshu culture.

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