Photo: Thirteen-fri · CC BY-SA 4.0 · Wikimedia Commons
Keio Takaosan Onsen
Keio Takaosan Onsen is a hot spring town in Tokyo, Japan. The water leaves the ground at 26.2°C, cool enough that the baths here are usually reheated. It measures pH 9.9 — strongly alkaline. Officially the water is classed as simple spring and sulfur spring. Its sources put out around 300 litres a minute.
The water here
Simple spring
Mild and low in dissolved minerals. Usually clear and gentle on the skin, which is why these baths are often recommended for first-timers.
Sulfur spring
The classic rotten-egg smell and milky white water. It can tarnish silver jewellery, so take it off.
The numbers
- Water temperature
- 26.2°C
- pH
- 9.9 (strongly alkaline)
- Discharge
- 300 litres a minute
- Address in Japanese
- 東京都八王子市高尾町2229番7
Figures from the town's Japanese Wikipedia article.
Where it is
35.6321, 139.2692 — open the map
Read more
Other towns in Tokyo
Planning a first soak? Read how an onsen stay works, and what to do if you have tattoos.