A natural hot spring to visit after strolling Kawagoe's 'Little Edo' warehouse street. Its own sodium-chloride spring from 1,200 m fills indoor and open-air baths in two zones, 'Wood' and 'Stone', which swap between men and women daily. Nine baths and three saunas in all — a carbonated bath made by dissolving CO₂ into the spring water, a free-flowing source bath, bedrock-bath rooms and a private family bath — make for an in-house bath-hopping course. Adults ¥850 on weekdays, ¥950 on weekends and holidays; open 10:00–24:00 (from 09:00 on weekends and holidays, last entry 23:00), no regular closing day apart from maintenance. Body soap and shampoo provided; a soba-and-udon restaurant, massage and body scrub are on site. Seibu bus from Hon-Kawagoe Station (Seibu Shinjuku Line) to the 'Hōmukyoku' stop; 150 free parking spaces.

✔ Verified operating: 2026-09 駅探／るるぶ 2026-05（大人平日850円・土日祝950円・10–24時・無休）

Prices and hours change. Check official sources before visiting.

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