Gunma · Manza Onsen
Manza Onsen Yunohana Ryokan
万座温泉 湯の花旅館
At 1,800 m in Manza Onsen — said to have the highest sulphur content in Japan — this is the most rustic of the old spa-cure inns. The wooden bathhouse holds just one indoor tub per gender, but the milky acidic sulphur water is thick and hot enough to leave you drowsy afterwards. It is known for its 'Sarunokoshikake-yu', in which extract of a bracket fungus has long been added to the water. Day use 10:00–16:00, ¥700 for adults, towels sold for ¥250. For onsen fans who want an old-school cure-bath feel amid Manza's big resort hotels. The building has tilted due to ground subsidence, so phone ahead to confirm it is operating. About 40 minutes by bus from Manza-Kazawaguchi Station.
- Price (adult)
- ¥700
- Hours
- 10:00–16:00
- Closed
- Irregular (check ahead)
- Access
- About 40 min by Seibu bus from JR Manza-Kazawaguchi Station to 'Manza Onsen', then 3 min on foot; about 90 min by car from Usui-Karuizawa IC (Manza Highway toll)
- Water type
- Sulfur spring
- Tattoos
- Ask ahead
- Phone
- 0279-97-3152
- Open in Google Maps
- Google Maps ↗
Essentials
Stay in this onsen town
Compare and book stays in Manza Onsen. Day bathing itself needs no booking.
Opens partner booking site (affiliate)
Why go
- Rustic cure inn at 1,800 m
- Thick milky sulphur bath with fungus extract
- ¥700 day use; towels ¥250
Before you go
- No official tattoo policy is published — ask at reception.
- Ryokan day-use hours are limited and may be suspended in peak season — phone the same morning.
- Payment is usually by ticket machine in cash — bring coins.
- Last entry is 30–60 minutes before closing.
Features
Mood & scenery
Price
Who with
Convenience
Amenities
✔ Verified operating: 2026-09 万座温泉観光協会 日帰り一覧（10:00–16:00・中学生以上700円）／たびよみ 2025-05（地盤沈下・営業継続）
Prices and hours change. Check official sources before visiting.
More in this area
Sainokawara Open-Air Bath
A 10-minute walk west of Kusatsu's Yubatake, at the far end of Sainokawara Park, lies one of Japan's largest open-air baths. Around 500 m² of pool brims with strongly acidic water, open to the surrounding forest. Snow in winter, fresh green in summer, illuminations at night. There are no washing stations — this is purely for soaking.
Otakinoyu
A large day facility where you can try Kusatsu's traditional 'awase-yu' — a row of wooden tubs at rising temperatures, entered in order. Indoor baths, rotenburo, sauna, plus rest and dining areas make it good for half a day. About 10 minutes' walk from the Yubatake, or a short bus ride. Admission ¥1,200 (2026); three-bath pass with Gozanoyu and Sainokawara ¥2,100.
Gozanoyu
Right in front of the Yubatake, a wooden recreation of the Edo–Meiji communal baths. Wood and stone bath halls alternate between men and women daily, with two sources (Yubatake and Bandaiko). The upstairs hall looks down on the Yubatake.