One of the largest spa complexes in Saitama, in Kumagaya in the north of the prefecture. Its own alkaline simple spring, pumped from 1,500 m at over 600 litres a minute, feeds a wide range of tubs — a free-flowing open-air 'raw source' bath, pot baths, lie-down baths and a high-concentration carbonated bath. There is a löyly sauna, cold plunge and a garden-view outdoor rest deck. The optional 'Onkatsu Café Nest' adds eight kinds of bedrock-bath rooms, manga and free drinks for an all-day stay. Admission ¥950 on weekdays, ¥1,100 on weekends and holidays; open 10:00–23:00 (last entry 22:30), no closing days. Private rooms with an open-air pot bath can be reserved by phone. About 10 minutes by bus or taxi from JR Kumagaya Station; 300 free parking spaces. Kumagaya is about 40 minutes from central Tokyo by Shinkansen — combine with rugby at the stadium or Menuma Shōdenzan temple.

✔ Verified operating: 2026-09 じゃらん／スーパー銭湯全国検索（大人平日950円・土日祝1,100円・10–23時・無休）

Prices and hours change. Check official sources before visiting.

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Saitama · Tamagawa Onsen (Tokigawa)Tattoos: Ask ahead

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Saitama · ChichibuTattoos: Not allowed

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Saitama · ChichibuTattoos: Ask ahead

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Day-trip onsenNatural hot springDay use ¥980