Saitama · Saitama city
Saitama Seiganji Onsen
さいたま清河寺温泉
A natural-spring bath complex on a wooded Musashino plot in Saitama's Nishi ward. The source, over 600 litres a minute from 1,500 m down, is a faintly green-tinged amber sodium-chloride water; in the outdoor area the rock bath and 'source tepid bath' are filled free-flowing without heating or dilution, and the place is famous among enthusiasts for its 'nuru-yu culture' of long soaks at around 38 °C. There are also raw-source pot baths, lie-down baths, a high-concentration carbonated bath, a sauna with löyly and a deep cold plunge, and an outdoor rest area facing the trees — remarkably quiet for the suburbs. Adults ¥880 on weekdays, ¥980 on weekends and holidays; children ¥500/¥550; open 10:00–24:00 (last entry 23:30), irregular closures. Restaurant, body care and scrub treatments on site. About 25 minutes by bus from JR Ōmiya Station to 'Seiganji', or by taxi from Ageo or Sashiōgi stations. A must for tepid-bath lovers in the Tokyo area; large car park.
- Price (adult)
- ¥880
- Hours
- 10:00–24:00
- Closed
- Irregular
- Access
- Seibu or Tōbu bus from JR Ōmiya Station west exit (toward Nishi-Asuma / Sashiōgi), about 25 min to 'Seiganji' then 5 min on foot; about 10 min by taxi from Sashiōgi (Kawagoe Line) or Ageo (Takasaki Line); about 20 min by car from Okegawa-Kitamoto IC
- Water type
- Simple spring
- Tattoos
- Not allowed
- Phone
- 048-625-7373
- Official site
- www.seiganji-onsen.com ↗
- Open in Google Maps
- Google Maps ↗
Essentials
Stay in this onsen town
Compare and book stays in Saitama city. Day bathing itself needs no booking.
Opens partner booking site (affiliate)
Why go
- Famous unheated 38 °C tepid source bath
- Open-air baths and rest area in woodland
- ¥880 weekdays; until midnight; 25 min bus from Ōmiya
Before you go
- Tattoos are explicitly not allowed, even if covered.
- Last entry is 30–60 minutes before closing.
Features
Sauna & wellness
Price
Amenities
✔ Verified operating: 2026-09 アソビュー 2025-09（大人平日880円 土日祝980円・10–24時・不定休）
Prices and hours change. Check official sources before visiting.
More in this area
Tamagawa Onsen — Showa Retro Bathhouse
In the hills of Tokigawa, Saitama, a popular day spa styled as a 1950s–60s Japanese town, complete with enamel signs and an old-fashioned sweet shop. Strongly alkaline (pH over 10) 'beauty' water that feels slippery on the skin, indoors and outdoors. Opens at 5 am on weekends for early bathers. ¥980 weekdays. About 1.5 hours from Ikebukuro by Tobu Tojo Line and town bus.
Seibu-Chichibu Station Onsen Matsuri-no-yu
About 80 minutes from Ikebukuro by Laview limited express, a complex hot-spring facility joined to Seibu-Chichibu Station. Themed on the 300-plus festivals Chichibu holds each year, it packs 9–10 tubs per side including open-air baths, a high-concentration carbonated bath and saunas. The food court serves waraji katsu-don and Chichibu soba; the shop sells local sake and miso pickles. ¥1,100 on weekdays, 10:00–22:00; morning baths from 6:00 on weekends.
Chichibu Onsen Mangan no Yu
A day spa on the Hinosawa stream in Oku-Nagatoro, named after Suisen-ji, the final temple of the Chichibu 34 Kannon pilgrimage. Mangan Falls tumbles right in front of the open-air bath—stunning in fresh green and autumn colour. pH 9.4 alkaline water with a pronounced silky feel. ¥980 weekdays (¥750 after 17:00), ¥1,200 weekends. Combine with the Nagatoro river boats or Mt. Hodo.