Biwakoyu: A Neighborhood Bathhouse in Central Nagahama

Biwakoyu is a small, old-school sento in central Nagahama, about a 15-minute walk from the station. It opens in the evening, and its listed admission includes the sauna. That makes it an easy post-sightseeing stop if you are already in town; it is less suited to anyone looking for a spacious spa, lake views or a morning bath.

Biwakoyu uses local groundwater; its classification as a natural hot spring is unconfirmed. For a documented onsen, compare Hamakogetsu, Nagahama Taiko Onsen or Kitaomi no Yu.

Updated September 30, 2026.

Opening hours

Biwakoyu is listed as open 5:00–11:00 p.m. Tuesday through Sunday, with Monday as its regular closing day. Holiday schedules can differ, so call ahead if you are visiting around New Year or on a public holiday. There is no morning or daytime bathing here.

Admission and the October 2026 price ceiling

The October figures are prefectural caps for ordinary public baths, not confirmed Biwakoyu prices. The latest facility listings still show the earlier fares; a May 2026 visit record says sauna use was included in the adult admission. Check the entrance sign or call 0749-62-3674 before visiting from October onward. Bring cash as a fallback because current listings do not confirm cashless payment.

A compact bath and a very small sauna

The bathing area is on the second floor. Its lineup is more varied than the building's modest scale suggests: a deep main bath, a changing or herbal bath, an electric bath, jet baths, a sauna and a cold plunge. The groundwater is part of the bathhouse's local character, and the Shiga bathhouse guide describes it as water from the Ibuki foothills.

Space is tight. The sauna is listed for roughly three people on the men's side and two on the women's side; those are reported capacities, not guaranteed available spots. Recent user-submitted readings have varied by side and visit, so treat temperatures as snapshots rather than fixed settings. The men's sauna has a posted rule against pouring water on the heater. There is no confirmed auto-loyly or regular sauna event program.

The cold plunge is also small—about one person at a time in some reports. Its water comes from groundwater, but that does not make it a spring-analysis pool or establish a fixed year-round temperature. If you want a roomy sauna, outdoor cooling area or somewhere to lounge between rounds, a larger facility such as Kitaomi no Yu is a better fit.

Groundwater is not proof of a natural hot spring

Some third-party directories label Biwakoyu “natural” or “flow-through.” The public-bath listing classifies it as an ordinary bathhouse, and its local information describes groundwater. A current onsen analysis, spring classification, source temperature and pH are unconfirmed.

That distinction matters if you are choosing a facility for its mineral composition or a legally documented hot spring. The name “Biwakoyu” and the use of groundwater do not establish either. For a documented hot-spring stay in Nagahama, see Hamakogetsu; for a longer spa visit with sauna facilities, see Kitaomi no Yu.

What to bring, and where to keep valuables

Pack a small towel, a bath towel and your own shampoo and body wash. Towel rental or purchase may be available, but a current fixed price was not confirmed; listings also do not establish that toiletries are supplied.

Take extra care with valuables. User reports note that some clothing lockers do not lock and warn against bringing valuables into the bathing area. Carry only what you need, and ask at the counter whether a secure place is available before changing. Tattoo rules are not clearly published in the sources checked, so call ahead if access depends on it.

Older descriptions mention a first-floor coffee lounge and coin laundry, but a 2026 visit report could not locate the lounge. Treat both as unconfirmed rather than building them into your plans.

Getting there from Nagahama Station

The address is 5-18 Koshincho, Nagahama, Shiga. Walking from Nagahama Station takes about 14–18 minutes depending on the route; around 15 minutes is a sensible planning estimate. The bathhouse is not right by the station, but it can fit naturally after a walk around central Nagahama or the Kurokabe district.

There is parking at the building. Listings differ on the total count, so check the available spaces on arrival rather than relying on a precise number. If you are exploring the historic centre on foot, finishing at Biwakoyu also avoids making a separate out-and-back trip from the station.

Is Biwakoyu the right stop for your evening?

It suits a low-cost bath and sauna after sightseeing, especially if you enjoy neighborhood sento and do not mind sharing a compact room with regulars. The main trade-off is space: the sauna and cold plunge are tiny, and the bathing area can feel crowded when several people arrive together.

Choose another facility if you need a confirmed natural hot spring, a large relaxation area, a restaurant, outdoor bathing or a morning opening. For a broader comparison of facilities in the area, use the Kohoku, Nagahama and Maibara day-onsen guide or the Shiga sento guide, which covers other neighborhood bathhouses too.

Sources and verification

- Shiga Prefecture, public-bath price caps (updated September 1, 2026): https://www.pref.shiga.lg.jp/el00/2062.html - Shiga Public Health and Sanitation Association, Omi bathhouse guide: https://www.shigalife.or.jp/pickup/sentou/pdf/omi_sentou.pdf - Sauna Ikitai, Biwakoyu facility information and visit records: https://sauna-ikitai.com/saunas/2314 and https://sauna-ikitai.com/saunas/2314/posts - Nifty Onsen, Biwakoyu listing: https://onsen.nifty.com/kohoku-onsen/onsen009679/ - Yuru-to, Biwakoyu listing: https://yuru-to.net/detail.php?oid=8183 - Yahoo! Maps, Biwakoyu and visitor notes: https://map.yahoo.co.jp/v3/place/fWMynLUs6no - Image source: Nifty Onsen image gallery linked above. Reuse rights have not been independently verified.

Verified September 30, 2026.