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OnsenKōyama, Tokyo
Toshimaen Niwa-no-yu
About
Toshimaen Niwa-no-yu is a tranquil natural hot spring oasis in Tokyo, famous for its stunning Japanese garden designed by landscape architect Kenzo Kosugi. Perfect for couples and groups, it features a unique central bade pool where swimsuits are required, alongside traditional gender-segregated mineral baths, steam rooms, and saunas. It offers a peaceful, adult-only escape from the city's hustle.
Insider Tip
Bring a swimsuit to enjoy the co-ed outdoor bade pool and Finnish sauna together, as the rest of the facility is strictly nude.
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