Moriyama Yumoto Suisyun: Plan Your Visit to This Lakeside Spa

Updated September 30, 2026

Moriyama Yumoto Suisyun sits inside Pieri Moriyama, a shopping and leisure complex on Lake Biwa’s eastern shore. It combines a natural-spring outdoor bath, sauna and a separate bedrock-sauna area. Free shuttles from JR Katata and Moriyama stations make a visit possible without a car, though each route follows its own timetable.

The key decision is how long you plan to stay. The standard bathing ticket already includes the sauna; bedrock-sauna access costs extra and is most useful if you intend to settle in for a few hours. If your priority is a lakeside view, note that the operator’s bath photos show the men’s side. The women’s outdoor bath has frosted perimeter glass for privacy, so the view is less open.

Admission and towel costs

The operator’s current fee page lists these rates. The standard admission includes both the bathing area and sauna; the bedrock area is an add-on and cannot be used on its own.

Admission does not include towels. A rental towel set is available for ¥330. Shampoo and body soap are provided in the bathing area, and hair dryers are free to use. The facility uses barcode wristbands for purchases around the complex, with payment settled at checkout; the exact payment methods for purchasing admission or tickets may differ, so check the official fees and operating details if you are planning an all-card or cashless visit.

Opening hours and last entry

The spa opens 10 a.m.–midnight Monday through Saturday, and 7 a.m.–midnight on Sundays and Japanese public holidays. Last admission is 11:30 p.m. The operator says it is open year-round but may close temporarily for maintenance. Sunday and holiday mornings are the only regular early-bathing window; it does not open at 7 every day.

What the baths are like—and what is actually natural spring water

The outdoor panoramic bath is the facility’s signature: it uses the natural spring “Biwa-ko Bijo no Yu” on a flow-through basis and faces Lake Biwa. The operator classifies the water as sodium-chloride and bicarbonate spring water, with 1,221.4 mg/kg of dissolved minerals. Its posted source temperature is 34°C under the weather conditions noted on the official page; that is the spring temperature, not a promise that the bath itself is kept at 34°C.

There are other natural-spring baths, including Sazanami no Yu and a single-person ceramic pot bath. The high-concentration carbonated bath and reclining carbonated bath are artificial carbonated baths, not additional outlets of the same spring. The facility’s public pages do not provide a full treatment breakdown for every tub, so the flow-through claim should be applied to the panoramic outdoor bath rather than generalized to the whole complex.

The lake view is not identical on both sides. The operator notes that its photos show the men’s bath; the women’s outdoor bath uses frosted glass around the perimeter for privacy. Women still have an outdoor bathing area facing the lake, but the sightline is screened compared with the promotional images.

This is a busy commercial spa inside Pieri Moriyama, not a secluded bath in the hills. Expect families, shoppers and sauna users alongside onsen visitors. The setting is a better match for a relaxed half-day with a view than for quiet, remote bathing.

Sauna is included; the bedrock area is the extra

The standard ticket covers the high-temperature sauna, cold bath and outdoor rest chairs. Automatic löyly runs on the hour, according to the current sauna page. After cooling down, you can take a break outside with the lake in view. For safety, rinse off sweat before entering the cold bath, keep your head above water and skip the cold plunge if you feel unwell or have a condition that makes it unsuitable.

The separate bedrock area has four rooms, including a heated room with aroma löyly sessions at noon, 3 p.m., 6 p.m. and 9 p.m. Other facilities include a cool room, lake-facing recliners and a manga corner.

The add-on includes bedrock wear and runs until 11:30 p.m.; last entry is 11 p.m. Elementary-school children may enter, but preschool children may not. For a quick bath and sauna, the standard ticket covers both.

Getting there without a car

The address is Pieri Moriyama, 2620-5 Imahama-cho, Moriyama, Shiga. JR Katata Station on the Kosei Line and JR Moriyama Station on the Biwako Line both have a free shuttle to the complex. The Katata service runs via Mai Plaza; the Moriyama shuttle leaves from the west exit. The operator currently describes the service as roughly hourly, but the individual timetables and special-day calendar are route-specific and can change. Check the current shuttle timetable on the day you travel.

Seats are limited, buses may be delayed by traffic, and passengers cannot board or get off between the listed stops. Do not plan a tight connection to a long-distance train around the last shuttle. The operator also lists local bus options—about 10 minutes from Katata or 25 minutes from Moriyama—if the free service does not fit your schedule. For alternatives with different station access, see the Shiga guide to onsen visits without a car.

Pieri Moriyama has C parking and rooftop parking. The route from Kyoto, Osaka or Otsu crosses the toll Lake Biwa Bridge; include the bridge toll in your driving cost.

Families, mixed bathing and tattoo rules

Children have their own admission rates, but check the mixed-bathing rule if an adult plans to take a child into the opposite-sex bath. The current fee page allows it only when the child is both under eight and under 120 cm. A child who meets either limit but not the other cannot use mixed bathing. Children below junior-high-school age may not bathe alone. Bedrock-sauna access starts at elementary-school age.

The current entry rules prohibit tattoos, including those covered with a tattoo sticker. If that applies to you, choose another facility.

Moriyama Yumoto Suisyun or Agaryanse?

Both facilities pair natural hot springs with sauna and bedrock bathing, but the practical balance differs. Suisyun’s strengths are the station shuttles, lake-facing outdoor bath and sauna included in the base ticket. Agaryanse is a more complete stay-in-the-building option: its entry package includes a facility outfit, bath towel and face towel, while bedrock access is a separate ¥300 clothing charge. If you want a full day with meals, relaxation areas and multiple facilities, compare the details in the Agaryanse day-use comparison and Agaryanse guide.

For a smaller bath closer to town, see Hotaru no Yu in Moriyama. The broader Shiga day-use onsen guide compares facilities around the prefecture. Other options include the Osaka day-use onsen guide and Kyoto day-use onsen guide.

Sources

• Fees, opening hours and bathing rules — admission, sauna inclusion, bedrock surcharge, towels, mixed-bathing and tattoo policies.
• Baths and spring details — spring classification, source temperature and bath-side view note.
• Access and free shuttle buses — station routes, current timetables and travel cautions.
• Sauna and bedrock bathing — löyly schedule, rest areas and hours.
• How to use the facility, FAQ and children’s bathing guidance — facility procedures and child-specific rules.
• Payment and checkout — wristband purchases and payment process.