Saitama · Saitama city
Minuma Tennen Onsen Koharubiyori
見沼天然温泉 小春日和
A natural-spring day-bathing facility in Minuma-ku, Saitama. The unheated raw spring of Someya Tennen Onsen Hanamizuki (a sodium-chloride strong-salt spring at 38.4°C) flows free into the open-air and most indoor baths.
- Price (adult)
- ¥950
- Hours
- Weekdays 10:00-24:00 / weekends & holidays 9:00-24:00 (last entry 23:15)
- Closed
- Open year-round (occasional closures for inspections)
- Access
- 3-191 Someya, Minuma-ku, Saitama. Free shuttle bus from Kita-Urawa Station East Exit, or about 10 minutes by car from Higashi-Omiya Station. Free parking for 250 cars. Entry from age 5.
- Water type
- Simple spring
- Tattoos
- Ask ahead
- Phone
- 048-686-3636
- Official site
- koharubiyori.co.jp ↗
- Open in Google Maps
- Google Maps ↗
Essentials
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Why go
- A sodium-chloride strong-salt spring (hypertonic, neutral, thermal), unheated and free-flowing, 38.4°C
- Open-air baths (hot, warm, half-body) and indoor baths, a tower sauna and a binchotan cold bath
- 950 yen weekdays / 1,050 yen weekends (600 / 700 yen children); free shuttle from Kita-Urawa Station
About this onsen
The spring, called Someya Tennen Onsen Hanamizuki, is a sodium-chloride strong-salt spring (hypertonic, neutral, 38.4°C, pH 7.4) that flows into the baths unheated, so its strong salt content keeps you warm long after.
Good to know
Admission is 950 yen on weekdays and 1,050 yen on weekends/holidays (children 600 / 700 yen). Entry is allowed from age 5, and with last admission at 23:15 it stays open late.
Before you go
- No official tattoo policy is published — ask at reception.
- Last entry is 30–60 minutes before closing.
Features
Sauna & wellness
Convenience
Price
Amenities
✔ Verified operating: 2026-10 Operating status and rates cross-checked against the official site and onsen guides (full source notes in Japanese on the JA page)
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.
