Fukushima · Ashinomaki Onsen, Aizu
Ashinomaki Onsen Ōkawasō
芦ノ牧温泉 大川荘（日帰り入浴）
The largest and most storied inn of Ashinomaki Onsen, a spa strung along the Aga (Ōkawa) river gorge south of Aizu-Wakamatsu. Its soaring lobby 'floating stage', where live shamisen echoes each evening, became famous for resembling the bathhouse of a beloved animated film. The star is the 'superb-view open-air bath' cantilevered over the gorge, looking down on the river and the mountainsides through the seasons – spectacular in autumn colour and winter snow. The clear sodium-calcium sulfate-chloride water warms deeply and holds its heat. Day bathing runs 11:00–15:00 (reception until 14:00) for ¥1,800 per adult and ¥900 for ages 3–12, tax and bathing tax included with a face towel, open every day. The 'sky open-air bath' can be booked privately for ¥3,300 per 45 minutes (two slots each at 13:00 and 14:00), and day plans with lunch in a private room from ¥5,500 are popular. Free parking for 150 cars, pick-up from Ashinomaki-Onsen Station on the Aizu Railway, or about 40 minutes by car from Aizu-Wakamatsu IC via Route 118. A natural stop between Ōuchi-juku and the Tō-no-Hetsuri cliffs.
- Price (adult)
- ¥1,800
- Hours
- 11:00–15:00 (last entry 14:00)
- Closed
- Open daily (may be suspended when busy or fully booked)
- Access
- About 10 min by shuttle (reservation required) from Ashinomaki-Onsen Station (Aizu Railway); about 40 min by car from Aizu-Wakamatsu IC via Route 118; Aizu Bus for Ashinomaki Onsen from Aizu-Wakamatsu Station about 40 min
- Water type
- Sulfate spring
- Tattoos
- Ask ahead
- Admission
- Day bathing: adults ¥1,800 / elementary ¥900 (adults may pay ¥150 bathing tax extra). The famous 'sky rotenburo' is a private reservation from 13:00 to 22:00, ¥3,300 per 45 min (free for overnight guests 5:30–9:30). Day plans with lunch available (reservation required)
- Baths
- Main bath 'Shiki-butai Tanada' (indoor pool, terraced open-air tubs stepped like rice paddies, sauna; two rotenburo per side). The private 'sky rotenburo' juts out over the gorge. Shampoo, conditioner, body soap, bath towels and dryers provided; free lockable lockers
- Water
- Calcium-sodium sulphate-chloride spring, free-flowing from the source. Colourless, yet distinctly slippery on the skin; it heats you to the core and the warmth lingers. Indicated for chronic rheumatism, neuralgia, burns
- Parking & access
- Free parking for 100 cars. About 5 min by car from Ashinomaki-Onsen Station on the Aizu Railway (pick-up for overnight guests, confirm in advance). About 30 min by car from JR Aizu-Wakamatsu Station, shuttle for guests. About 40 min from Aizu-Wakamatsu IC on the Banetsu Expressway
- Phone
- 0242-92-2111
- Official site
- ookawaso.co.jp ↗
- Open in Google Maps
- Google Maps ↗
Essentials
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Why go
- Cantilevered gorge-view open-air bath; autumn & snow
- Famous atrium lobby with live shamisen
- ¥1,800 incl. towel; 11:00–15:00; open daily
A 97-room inn perched over the Okawa gorge
Aizu Ashinomaki Onsen Okawaso is the largest inn — 97 rooms — at Ashinomaki Onsen, where ryokan line the Okawa gorge (the upper Agano River) in the south of Aizu-Wakamatsu, Fukushima. Built out over the cliff, it is famous for its multi-storey lobby atrium and the live shamisen performance on the 'floating stage' at its centre every evening (around 16:00–18:00); lately younger visitors have flocked here for its resemblance to a castle in a popular anime. The water is free-flowing from the source, and the signature baths are 'Shiki-butai Tanada', open-air tubs terraced like rice paddies, and the 'sky rotenburo' cantilevered over the gorge.
Terraced rotenburo and the sky bath
The main bath 'Shiki-butai Tanada' comprises an indoor pool, a sauna and open-air tubs that step down towards the gorge, so whichever tier you settle on, the Okawa River and the hills lie below you. Autumn colour and winter snow are the favourite seasons; each side has two rotenburo. The water, a calcium-sodium sulphate-chloride spring, is colourless yet clearly slippery when you rub your skin, and like a true sulphate spring it warms you through so the glow lasts long after. The 'sky rotenburo' projecting over the gorge is a private booking by day and evening (13:00–22:00) at ¥3,300 per 45 minutes, but overnight guests get it free from 5:30 to 9:30 the next morning — the morning soak is the smart move.
Tips
Day bathing is 11:00–15:00 (last entry 14:00) at ¥1,800 for adults and ¥900 for children — steep for Aizu, but bath towels and amenities are included. On autumn-leaf and snow-season weekends or when groups are booked, day use may be suspended, so phone ahead. Day plans with lunch (reservation required) are also offered. The shamisen performance is in the evening, so day visitors will miss it — stay overnight to see it. Five minutes by car from Ashinomaki-Onsen Station (famous for its cat stationmaster), 30 minutes from Aizu-Wakamatsu Station with a guest shuttle; free parking for 100 cars. Fits a southern Aizu itinerary with Ouchi-juku and To-no-Hetsuri.
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.
- 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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