Okajo Tennen Onsen: Tsuki no Shizuku
Taketa, Oita, Japan
- Location
- Taketa, Oita, Japan
- Water type
- thermal, sodium chloride
- Temperature
- 40 °C
- pH
- 7.3
Water profile
Thermicity
Sedative
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
Okajo Tennen Onsen, also known as Tsuki no Shizuku, is located in Taketa, Oita Prefecture. Its sodium-chloride water reaches around 40°C, with an indoor bath, an outdoor rotenburo bath and a sauna.
Insider tip — 'Tsuki no Shizuku' (月の雫 — drops of moonlight) at Okajo Tennen Onsen, named for the magnificent Oka Castle ruins (岡城) in Taketa city. Oka Castle inspired Rentaro Taki's 1901 piano composition 'Kojo no Tsuki' (荒城の月 — Moon over the Ruined Castle) — one of Japan's most beloved melodies, now an internationally recognized symbol of Japanese lyrical tradition. 'Drops of moonlight' in the castle's shadow is a perfect evocation: soaking in volcanic water while the moonlit castle walls stand in ruins above, exactly as Taki imagined when he composed his masterpiece.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 40 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features thermal & sodium chloride water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.