An onsen in Inagi with a natural spring pumped from a depth of 1,700 metres.
The centre has indoor and outdoor baths, a sauna and a heated-stone bathing area (岩盤浴, iwanburo) at extra cost. The natural spring water, according to an English-language tourist guide, is pumped from a depth of 1,700 metres. At weekends attendance is high and the wait at the entrance can get longer.
A paid hot-spring complex, open every day until one in the morning, in the Kōyōdai neighbourhood of Inagi. It has no designation or stated historical connection: the draw is the spring itself and the range of baths.
ℹ️ Weekdays 9:00–25:00 (last entry 24:00), Saturdays, Sundays and public holidays 7:00–25:00 (last entry 24:00). Closed on the third Tuesday of March, June, September and December. Adults: 1,000 yen on weekdays, 1,200 yen on public holidays (children 520/680 yen). A 2024 review reports a chiller breakdown that brought the water to 23°C: an isolated case, stated as such by the review itself.
🚉 Minami-Tama · 6 min walk
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