Tokushima · Ōboke Onsen
Oboke Onsen Sun River Oboke
大歩危温泉 サンリバー大歩危
The spring of an inn in the Oboke and Koboke gorges. Its great bath and open-air bath look over Koboke Gorge and the Yoshino River; day bathing is ¥700.
- Price (adult)
- ¥700
- Hours
- 12:00–21:00 (last entry 20:00)
- Closed
- Open daily
- Access
- On the Yoshino River by Koboke Gorge in Yamashiro-cho, Miyoshi, Tokushima; about 30 minutes by car from Ikawa-Ikeda IC.
- Water type
- Alkaline simple
- Tattoos
- Ask ahead
- Admission
- Day bathing is a flat ¥700 for adults and ¥350 for children. Hotel guests bathe free.
- Hours and closure
- Day bathing runs 12:00–21:00 with last entry at 20:00. There are no regular closing days, but the baths may close from 15:00 on Saturdays, holidays or when groups are staying. A phone call before you go is the surest check.
- Spring quality
- An alkaline simple spring from Oboke Onsen, so strongly alkaline that it is called the rejuvenating bath, needing no lotion afterwards. It is indicated for the skin, cold sensitivity, digestive complaints, neuralgia, sprains, muscular and joint pain, skin conditions, haemorrhoids, frozen shoulder, women's complaints, motor paralysis and bruises.
- Baths and views
- There is one open-air bath and one indoor bath for each sex. The great bath faces straight onto the landscape, taking in Koboke Gorge and the flow of the Yoshino River. From spring greenery to autumn colour and winter snow, the gorge changes with the seasons and can be watched from the tub.
- Phone
- 0883-84-2111
- Official site
- oobokeonsen.jp ↗
- Open in Google Maps
- Google Maps ↗
Essentials
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Why go
- Great bath overlooking Koboke Gorge and the Yoshino River
- A strongly alkaline beauty bath called the rejuvenating spring
- Separate open-air and indoor baths for men and women
An inn's spring in the Oboke and Koboke gorges
Sun River Oboke is an inn in the Oboke and Koboke gorges of Yamashiro-cho, Miyoshi, Tokushima, inside the Tsurugisan Quasi-National Park. The Yoshino River, said to be Japan's fiercest torrent, runs below, and the great bath looks straight over Koboke Gorge and the water. The spring is an alkaline simple one from Oboke Onsen, with separate open-air and indoor baths. Day visitors are welcome from 12:00 to 21:00 even without a room.
A strongly alkaline bath called the rejuvenating spring
The spring is an alkaline simple one, strongly alkaline enough that the inn describes it as the rejuvenating bath, needing no lotion. It is indicated for the skin, cold sensitivity, digestive complaints, neuralgia, sprains, muscular and joint pain, skin conditions, haemorrhoids, frozen shoulder, women's complaints, motor paralysis and bruises. There is one open-air and one indoor bath for each sex, so you can soak in the gorge breeze. The great bath's view of the river changes with every season.
Timing and cautions for a day visit
Day bathing runs 12:00–21:00 with last entry at 20:00, and the flat rates are ¥700 for adults and ¥350 for children. There are no regular closing days, but the baths may be closed from 15:00 on Saturdays, holidays or days with group bookings, so an afternoon visit is best checked by phone first on 0883-84-2111. By car it is about 30 minutes from Ikawa-Ikeda IC, an easy stop to combine with a drive along the gorge.
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
Who with
Price
Convenience
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.
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Hotel Kazurabashi – Sky Open-Air Bath
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