Tokyo · Tokyo City
Maenohara Onsen Sayanoyudokoro
前野原温泉 さやの湯処
Eight minutes from Shimura-sakaue Station in Itabashi, one of Tokyo's most atmospheric super-sento, built around a Showa-era mansion and dry-landscape garden. Free-flowing olive-green spring water in the rotenburo, high-concentration carbonated bath, stone sauna and a soba restaurant. ¥970 weekdays, ¥1,300 weekends and holidays; open until midnight. No tattoos.
- Price (adult)
- ¥970
- Hours
- 09:00–24:00 (last entry 23:00)
- Closed
- Open daily (one maintenance closure a year)
- Access
- 8 min walk from Shimura-sakaue Station (Toei Mita Line)
- Water type
- Simple spring
- Tattoos
- Not allowed
- Admission
- Adults ¥970 weekdays / ¥1,300 weekends & holidays; children ¥600 / ¥900 (toilet-trained toddlers to elementary). Towel ¥160 to buy, bath-towel set ¥380 to hire. Bedrock bath ¥760. Private semi-open bath ¥2,100/h plus admission (reserve). On busy days +¥100/h beyond 5 hours
- Baths
- Fourteen baths per gender. Outdoors: free-flowing source tub, rock rotenburo, three pot baths and a lie-down deck. Indoors: high-concentration carbonated bath 39 °C, standing bath, lying bath, seated bath, 16 °C cold plunge. Two saunas (dry 86 °C; herbal salt steam 50 °C in the women’s side). Restored farmhouse restaurant Kakitensha (100 % buckwheat soba), dry-landscape garden and tatami nap room
- Water
- Iodine-bearing sodium chloride strong-salt spring (hypertonic, neutral) pH 7.4, 36.9 °C at source, 22,160 mg/kg dissolved solids. The source tub is free-flowing without dilution. Pale olive “uguisu” colour, strongly salty and ferrous — a classic “heat bath”
- Parking
- 74 spaces, free for 5 hours — unusually car-friendly for Tokyo
- Phone
- 03-5916-3826
- Official site
- sayanoyudokoro.co.jp ↗
- Open in Google Maps
- Google Maps ↗
Essentials
Stay in this onsen town
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Why go
- Dry garden and Showa mansion
- Free-flowing spring rotenburo
- Open until midnight
A farmhouse-style spa with undiluted free-flowing water inside Tokyo’s 23 wards
Sayanoyu-dokoro opened in 2005 in a residential part of Itabashi ward and has held a top spot in Tokyo onsen rankings for years. The reason is the water: an iodine-bearing strong-salt spring from 1,500 m down (22 g/kg dissolved solids) fills the outdoor “source tub” free-flowing and undiluted — pale olive, strongly salty and ferrous, a real onsen in the middle of the city. The setting is distinctive too: a relocated Showa-era farmhouse serves 100 % buckwheat soba overlooking a dry-landscape garden, there is a tatami nap room, four bedrock-bath rooms and a private semi-open bath — a ryokan-like day for ¥970 on weekdays. Eight minutes on foot from Shimura-sakaue Station, with 74 parking spaces, it is also easy by car from northern Tokyo.
Tips & cautions
- The free-flowing source tub is small and around 41 °C; the hypertonic water can make you light-headed — bathe in 5-minute spells.
- Weekends cost ¥1,300 and get very crowded; arrive before noon. Weekday evenings are relaxed.
- Towels not included (¥160 to buy) — bring your own.
- No tattoos.
- Private bath: no mixed bathing for ages 7+, reservation required.
- The soba restaurant Kakitensha has lunchtime waits — check ordering times before bathing.
Getting there
8 min on foot from exit A2 of Shimura-sakaue Station (Toei Mita line) — Maeno-cho 3-41-1, Itabashi-ku. Or Kokusai Kogyo bus from JR Akabane west exit to “Maeno-cho 3-chome”, 1 min walk; buses also from Tokiwadai (Tobu Tojo line). By car ~4 min from the Itabashi-honcho exit via Route 17; 74 free spaces (5 h).
Before you go
- Tattoos are explicitly not allowed, even if covered.
- Last entry is 30–60 minutes before closing.
Features
Rules & private
Mood & scenery
Price
Who with
Amenities
✔ Verified operating: 2026-09 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.
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