Tochigi · Kinugawa Onsen
Kinugawa Onsen Niouson Plaza (day bathing)
鬼怒川温泉 仁王尊プラザ（日帰り入浴）
A small riverside hotel on the south side of Kinugawa Onsen, five minutes from Tobu World Square Station. While the big hotels stop day bathing around 15:00, this one welcomes walk-ins 9:00–21:00 for ¥700. Its own alkaline sulfur spring (43.6 °C) flows 100% free into a quirky set of baths: a rotenburo made from an actual Kinugawa river-cruise boat, a rock rotenburo, indoor baths and a swimsuit mixed bath. The slightly cool, silky water is highly rated by onsen fans.
- Price (adult)
- ¥700
- Hours
- 09:00–21:00 (last entry 20:00)
- Closed
- Open daily (occasional closures)
- Access
- 5 min walk from Tobu World Square Station; 20 min from Kinugawa-Onsen Station
- Water type
- Alkaline simple
- Tattoos
- Ask ahead
- Admission
- Adults (junior-high+) ¥700 / children (3+) ¥350. No booking. Bath towel rental ¥200, towel set ¥300, face towel ¥150 to buy. Cards, IC cards and e-money accepted
- Baths
- Four bath areas, each with its own changing room: indoor baths, rock rotenburo, the “yakatabune” rotenburo made from a retired Kinugawa river-cruise boat, and the swimsuit mixed open-air “Butai-no-yu”. Private bath also available
- Water
- Private alkaline simple sulfur spring, 43.6 °C, 100% free-flowing with no dilution, heating or recirculation. Clear, faintly sulfurous, mild and silky — rated by enthusiasts as one of Kanto’s genuine kake-nagashi baths
- Parking etc.
- Free, 50 cars. Fishing pond on site. Small 15-room inn, overnight stays possible
- Phone
- 0288-76-2721
- Official site
- www.niousonplaza.com/daytrip ↗
- Open in Google Maps
- Google Maps ↗
Essentials
Stay in this onsen town
Compare and book stays in Kinugawa Onsen. Day bathing itself needs no booking.
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Why go
- 9–21, walk-in, ¥700
- A rotenburo made from a river boat
- 100% free-flowing private source
¥700 until 9 p.m. in a town of big hotels — the Kinugawa day-bath answer
Kinugawa Onsen, lined with big gorge-side hotels, is surprisingly awkward for day bathing: most inns close to outsiders around 15:00, the municipal Kinugawa Park Iwaburo shut in March 2024 and Hotel Mikazuki ended day use in February 2025. Niouson Plaza is the exception — walk-in bathing from 9 a.m. to 9 p.m. for ¥700. Its 43.6 °C private alkaline sulfur spring flows with no dilution, heating or recirculation, earning a strong following as one of Kanto’s genuine free-flowing baths, and the playful line-up includes a rotenburo built from a whole retired river-cruise boat and a swimsuit mixed bath.
Tips & cautions
- The four bath areas have separate changing rooms, so you dress between each — allow time. Get a quick briefing at the desk, then head downstairs.
- The water is mild (~40–41 °C), suited to long soaks; adjust expectations if you want it hot.
- Swimsuit required in the mixed “Butai-no-yu”. Cards and IC cards accepted.
- 20 min on foot or ~¥1,000 by taxi from Kinugawa-Onsen Station; nearest is Tobu World Square Station (5 min).
- Day use may be suspended for group bookings — phoning 0288-76-2721 is wise.
Getting there
5 min on foot from Tobu World Square Station, or 20 min on foot / 5 min by taxi from Kinugawa-Onsen Station (Ohara 371-1). By car ~20 min from Imaichi IC via Route 121. Free parking for 50.
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
Rules & private
Amenities
✔ Verified operating: 2026-09 仁王尊プラザ公式・日本温泉協会・NAVITIME
Prices and hours change. Check official sources before visiting.
More in this area
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Kojika-no-yu
A day-use facility on the same source as Shika-no-yu, open every day until 9 pm with an open-air bath and private rooms. Ideal for families or anyone daunted by Shika-no-yu's rituals — the milky water is identical.
Ōmaru Onsen Ryokan, Oku-Nasu (River Bath)
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