Ryuzaki Onsen Shio-kaze-no-Yu: Dark Mineral Water by Agenesho Bay
Check Ryuzaki Onsen’s ¥730 admission, dark saline bath, sauna rotation, family-bath limits, bay views and bus route from Obatake Station.
Summary: Ryuzaki Onsen’s Shio-kaze-no-Yu pairs a dark, strongly saline spring with open-air baths facing Agenesho Bay and Mount Dake. Adult admission is ¥730; the facility also has a sauna and a restaurant. One detail remains unresolved: the town’s last pool-by-pool water-use notice is from January 2025, so call if bathing in source water throughout the facility matters to you.
Checked: September 27, 2026
A view over the bay comes with a very distinctive bath
The water at Shio-kaze-no-Yu is sepia-brown and strongly saline, a look that sets it apart from the clear baths at many day-use facilities. The open-air bath faces Agenesho Bay and Mount Dake. Inside, there are large communal baths and a sauna; the men’s and women’s sides rotate weekly, so the exact layout changes with the visit.
| Price or amenity | Listed amount / rule |
|---|---|
| Adult admission | ¥730 for junior-high age and older |
| Child admission | ¥410; the age band is unclear, so confirm it at the desk |
| Special rate | ¥520 for eligible Suo-Oshima residents aged 65+ and visitors with specified disability certificates; not a tourist discount |
| Adult 10-visit pass | ¥5,230 |
| Face towel / bath-towel rental | ¥100 each |
| Basic amenities | ¥100 each; POLA skincare set ¥200 |
| Adult visit with face towel and bath-towel rental | ¥930 total |
Changing rooms use baskets rather than individual lockable cubbies; put valuables in a locker.
Hours, closure days and the family bath
| Schedule | Current listing |
|---|---|
| Facility / bath hours | Facility 10:00–21:30; bathing 10:00–21:00, last admission 20:30 |
| Regular closures | Monday and one Tuesday each month; see the posted calendar |
| Restaurant | 11:00–21:30; last order 20:30; weekday orders pause 15:00–17:00 |
| Monthly Bath Day | On the 26th, dining spend of at least ¥500 per person after bathing earns a future admission ticket; confirm the month’s offer |
There is a family bath, but it is not an open-to-everyone private-room add-on. The current booking note limits reservations to groups accompanied by someone who needs care, an older person, a person with a disability, or a child under one year old. If that applies to your group, call 0820-77-1234 about availability and the fee.
What is known about the spring water
Ryuzaki is known for a sodium-chloride strong saline spring, and the water’s dark colour is part of the experience. The current facility page does not say which pools use the source. The town’s January 2025 notice recorded that, after partial repairs, the outdoor black-water bath used spring water while the other baths used tap water. If source-water use in a particular bath is important, ask the facility before setting out.
That uncertainty does not change the view or the facility’s current opening information, but it matters if you chose Ryuzaki specifically for the water rather than the seaside bathhouse. For a cleaner published set of source figures, Katazoegahama Yuyu Land has a 2024 analysis sheet with temperature and pH data. The two make different stops: Ryuzaki is by Agenesho Bay, while Yuyu Land is inside the Katazoegahama beach park. See the side-by-side comparison if you are planning a drive across the island.
The facility also lists a warm-water walking pool, but its current notice says that pool is out of service. Do not plan on aquatic exercise or rehabilitation there unless it reopens. The open-air bath, by contrast, is a strong reason to stop on a clear day: it looks across Agenesho Bay toward Mount Dake. In heavy rain, low cloud or strong wind, that view may not land as well.
There is a sauna on each bathing side, but the men’s and women’s sides swap weekly. Check the current assignment if you have a particular bath or sauna in mind. Tattoos are not clearly addressed in the cited current pages; ask the facility before relying on entry. The family bath is not a standard private-room option: reservations are limited to parties that include someone requiring care, an older person, a person with a disability or a child under one year old.
Getting there
From JR Obatake Station, the bus to Anko takes about 37 minutes, followed by a 10-minute walk. The walk is part of the trip, not a station-front arrival, and only some departures serve the relevant branch. Check the current timetable in both directions before bathing. By car, allow about 45 minutes from the Kuga interchange.
The car park is listed at about 40 spaces, though summer weekends and island events can make capacity less certain. If connecting to the train at Obatake, choose the return bus from Anko before entering the bath; the 8:30 p.m. last admission does not guarantee a late bus. For a public-transport plan that includes all three island facilities, use the Suo-Oshima no-car route guide.
