Yamashiro Onsen’s Two Public Baths: Which One Should You Use?

Yamashiro’s So-yu and Kosoyu are close together in the historic Yunogawa district, but the bathing routine is quite different. So-yu has taps and showers; Kosoyu recreates a Meiji-era bathhouse, with no showers and no soap or shampoo. The combined ticket covers both baths at a lower price than buying two admissions separately.

So-yu is the one for a proper wash

The newer So-yu has a spacious communal bath and two pools with different temperatures; the association does not publish fixed temperatures for them. It says the high-temperature spring is cooled through a heat-exchange system without adding water. Toiletries are not supplied, but washing products and bathing towels are available to buy, and a bath towel can be rented. The hair dryer is coin-operated.

So-yu is open from 6 a.m. to 10 p.m. The fourth Wednesday of each month is a morning maintenance period: the bath closes from 6 a.m. until noon, then reopens. That is not a full-day closure, although separate maintenance notices may change the schedule.

Kosoyu preserves an older bathing routine

Kosoyu was rebuilt to evoke a public bath from the Meiji period, including Kutani ceramic tiles and a second-floor resting room. The important difference is what is missing: there are no taps or showers, and soap, shampoo and other washing products cannot be used. The bathing routine is to rinse with bath water and soak.

That makes Kosoyu a poor substitute for a shower after a long travel day. It works better if you have already washed, want to experience the restored bathhouse and can take your time. The association describes it as a cultural bathing experience rather than a modern facility with full washing amenities.

Kosoyu normally opens from 6 a.m. to 10 p.m.; December through February hours are 7 a.m. to 9 p.m. It also closes on the fourth Wednesday from 6 a.m. to noon, then reopens.

The combined ticket is useful only if you want both experiences

Buying both admissions separately costs ¥1,200, so the ¥1,000 combined ticket saves ¥200. It is useful only if you want to visit both baths; there is no need to squeeze Kosoyu into a short visit just for the discount.

If time is short, choose So-yu for washing and bathing, or Kosoyu if the historic building and traditional bathing method are the point of your visit. With roughly 90 minutes or more, one option is to wash at So-yu first, then spend a shorter visit at Kosoyu. The two are in the same hot-spring district, so the walk between them is easy; the bus or drive into Yamashiro from Kaga Onsen Station takes more planning than the walk between baths.

Yamashiro is one part of the larger Kaga Onsen area. If you are choosing where to base yourself, compare the character and transport of Yamashiro and Yamanaka Onsen before booking.

Current prices and practical details

Kosoyu’s ¥700 rate took effect on April 1, 2026; older guides may still list it at ¥500.

Both baths have a fourth-Wednesday maintenance closure from 6 a.m. to noon, with service resuming at midday. The association may issue separate notices for other work. So-yu lists bathing towels for sale and rental; check the current notice if you need specific amenities or accessibility details.

Sources

• Yamashiro Onsen Tourism Association: So-yu and Kosoyu
• Yamashiro Onsen Tourism Association: Kosoyu
• Kaga City: 2026 Kosoyu price revision
• Official Kaga Onsen area site: Kosoyu

Prices, hours and maintenance schedules can change. Check the association’s current notice before travelling, especially in winter or on a fourth Wednesday.