Kusatsu Yumoto Suisyun: Natural Onsen, Saunas and Late-Night Bathing
Plan a visit to Shiga’s Kusatsu Yumoto Suisyun with current bath and sauna prices, late hours, shuttle rules and its natural outdoor spring.
Kusatsu Yumoto Suisyun is in Kusatsu, Shiga Prefecture, inside Aeon Mall Kusatsu’s Sports & Leisure building. It is a convenient fit for a long evening soak, a sauna-focused visit or a break while shopping. This is not Kusatsu Onsen in Gunma, and the mall location is not beside JR Kusatsu Station: plan on a bus, car or the facility’s limited member shuttle.
The outdoor rock bath uses the facility’s named natural spring, Omi Kusatsu Bijin no Yu. The source page lists it as a sodium-bicarbonate and chloride spring, with a flow rate of 172 litres per minute. Other baths, including the carbonated bath, are artificial additions and should not be confused with the natural source.
Admission, extras and the late closing time
The current official fee table lists adult bathing at ¥1,050 on weekdays and ¥1,200 on Saturdays, Sundays and public holidays. The bathing ticket includes the bathing area and its in-bath sauna facilities. Rock-sauna access is an extra charge and cannot be bought on its own.
| Ticket | Weekday | Weekend or holiday |
|---|---|---|
| Adult bath admission (junior high school age and over) | ¥1,050 | ¥1,200 |
| Elementary-school child | ¥520 | ¥600 |
| Preschool child aged 3 and over | ¥260 | ¥300 |
| Child aged 2 or under | Free | Free |
| Adult rock-sauna supplement | +¥900 | +¥1,000 |
| Elementary-school rock-sauna supplement | +¥450 | +¥500 |
The adult total for bathing plus the rock-sauna area is ¥1,950 on a weekday or ¥2,200 on a weekend or holiday. The rock-sauna fee includes its dedicated clothing and a large towel mat. Children under elementary-school age cannot enter that area; elementary-school children need an accompanying adult.
The facility lists opening hours as 9 a.m. to 1 a.m., with last admission at midnight. It is open year-round in principle, though maintenance can cause temporary closures. Shampoo and body wash are provided in the bathing area, but towels and other bathing supplies are not included; bring your own or buy them inside. The facility uses a barcode wristband for purchases, which are settled at the exit.
A natural outdoor bath, with a much larger sauna setup
The natural spring bath is an outdoor, two-level rock bath. The indoor and outdoor bathing areas also include artificial carbonated water, a milky bath, pot baths, reclining and sitting baths, and jet baths. The facility’s spring page identifies the natural water as sodium-bicarbonate/chloride; it does not describe every tub as spring-fed.
Each bathing area currently lists four sauna types: a loyly sauna, a barrel sauna, a herbal-salt sauna, plus a gender-specific room. The men’s side has a quiet, self-loyly meditation sauna; the women’s side has a light-themed sauna with automatic loyly every 15 minutes, according to the current sauna page. The standard loyly sauna also runs automatic steam hourly. Event times and features can change, so check the official sauna page on the day if a particular session is the reason for your visit.
The expanded outdoor sauna area opened in January 2026. Men can use a 1.6-metre standing plunge, which is off-limits to elementary-school children and younger; both sides also have a separate 0.9-metre outdoor cold bath. Staff heat-wave sessions run at different times by bathing area, and the women’s light sauna has automatic loyly every 15 minutes. Treat event times as a day-of detail: the operator can revise the schedule.
The outdoor sauna area has cold baths as well. A 1.6-metre-deep standing plunge is reserved for the men’s bath and is prohibited for children of elementary-school age and younger. A separate outdoor cold bath is listed at 0.9 metres deep. These are practical details to check before taking children or anyone uncomfortable with deep water.
Rock-sauna admission makes the most sense if you expect to spend several hours using the heated rooms and the dedicated rest area, which includes roughly 16,000 manga and magazines. If you mainly want the natural outdoor bath and sauna circuit, the basic bathing ticket already covers those. Avoid paying for the extra area just because it appears beside the entrance fee; it is a separate facility and a longer-stay choice.
Getting there from the stations
The address is 300 Shinhama-cho, Kusatsu, Shiga, inside Aeon Mall Kusatsu. Drivers can use the mall’s free parking. From the main mall building, follow the connecting underpass to the Sports & Leisure building; the bathhouse is not in the main shopping building.
By public bus, the operator lists journeys of about 15 minutes from JR Seta Station, 20 minutes from JR Minami-Kusatsu Station and 25 minutes from JR Kusatsu Station.
The direct free shuttle serves JR Seta and JR Ishiyama, not JR Kusatsu. Riders need a Suisyun membership card or app pass; first-time visitors can ride if they tell the driver they will register after arriving. For the return trip, show that day’s receipt as well as the membership pass. The shuttle timetable ends before the bath closes, so arrange a regular bus, taxi or other ride for a late visit.
Rules to know before you go
The official usage guidance prohibits entry for people with tattoos, including tattoo stickers. It does not list a cover-sticker exception. Food and drink brought from outside are also not permitted. Children under junior-high-school age cannot bathe alone; mixed-gender bathing with a child is limited to children under elementary-school age and no taller than 120 cm.
If those rules work for your group, Suisyun offers a broad set of baths and saunas without requiring an overnight stay. If you only need a small bath near the station, Sakurayu in Kusatsu, Shiga is a different, simpler kind of visit. For a mountain-side alternative, see Kutsuki Onsen Tenkuu; the Ogoto ryokan comparison covers overnight stays rather than mall-based day bathing.
