17 Facilities7 Onsen towns
A Meiji-era inn at the entrance to the Jigokudani Monkey Park, famous worldwide for wild macaques that climb into its rotenburo in winter. Day bathing is only 12:00–15:00, so most visitors combine it with the monkey park. It's a 30-minute mountain trail from Shibu Onsen — wear grippy shoes in winter.
The centerpiece of Nozawa's 13 public baths, a traditional bathhouse in the middle of the village. Local 'yunakama' associations have cleaned it daily since the Edo period; payment is a donation in the box at the door. Two pools, hot and 'mild' — though even the mild one exceeds 42°C. Adding cold water is bad manners: rinse first, then keep soaks short. No soap or shampoo.
The signature inn of Shirahone, famous for milky-white water. Its highlight is a large mixed-gender open-air bath — the water is so opaque that women find it comfortable. Day use at midday only.
One minute from the Yudanaka station gate: a free-flowing day bath with two bathrooms (each with an open-air tub) that swap monthly. The lounge overlooks the platform — perfect while waiting for the train back from the snow-monkey park.
Of Shibu's nine communal baths along the cobbled street, No. 9 'Ō-yu' is the only one open to non-guests. Hot rusty-brown water plus a steam room fed by the source; a footbath on the roof. Buy a ¥800 ticket at the tourist office or nearby inns and have the door unlocked for you.
In Nozawa, where 13 outer baths are free (donation), this is the only paid day facility with showers, shampoo and an open-air bath. A handsome building with a curved gable, hot and mild indoor pools and a stone outdoor bath — the fallback when the outer baths are too hot or you want a proper wash.
Right at the Shirahone bus stop, gender-separated public open-air pools built against the gorge cliff. Milky bicarbonate water for ¥700; no washing area, pure rustic soaking. Closed late Nov–late Apr and Tuesdays. Handy before or after Awa-no-yu's short day-use window.
One of the three public 'outer baths' of Bessho Onsen near Ueda, the spa village nicknamed 'Kamakura of Shinshū'. Ishiyu is famed as the hidden bath of warrior Sanada Yukimura in Ikenami Shōtarō's novel Sanada Taiheiki; its tub is built around natural bedrock, filled free-flowing with faintly sulphurous, mildly alkaline water. Open 6:30–21:30 (last entry 21:00), closed Tuesdays, a modest ¥300 with free lockable lockers. Pair it with the other two — Ōyu (closed 1st & 3rd Wed) and Daishiyu (closed 1st & 3rd Thu) — plus Kitamuki Kannon temple and the National Treasure octagonal pagoda of Anrakuji, all on foot. Ten minutes' walk from Bessho-Onsen Station on the Ueda Dentetsu line.
In Asama Onsen, Matsumoto's spa hinterland, this day-use bath occupies the house of the hereditary bath-keepers who guarded the lords' private 'Goten-yu' for 400 years, since castle lord Ishikawa Kazumasa. Old garden trees and displays on the bath-keepers' history give the place the feel of a heritage site; the clear, mildly alkaline simple spring is fine-textured on the skin. Besides the main hall there is an open-air bath in a separate wing and a rest room, and many visitors come straight from Matsumoto Castle. Open 9:00–21:00 (last entry 20:00), closed Mondays (or the next day after a holiday), ¥900. About 20 minutes by bus from Matsumoto Station to Asama-Onsen Bunka Center-mae, then 10 minutes on foot.
A Western-style bathhouse on the shore of Lake Suwa, built in 1928 by the Katakura silk dynasty for the welfare of local residents and now an Important Cultural Property. Its famous Sennin-buro is a marble pool 1.1 m deep — you bathe standing, pebbles underfoot, surrounded by stained glass and sculpture — named for the hundred people it can hold at once. It uses Kamisuwa's spring water and also has a sauna and jet bath. Adults ¥750, open 10:00–20:00 (last entry 19:30), closed 2nd and 4th Tuesdays. The 2nd-floor rest room (until 19:00) and canteen (11:00–15:00) are open to bathers, and tours of the hall building are offered. Eight minutes on foot from Kami-Suwa Station, handy for Suwa Taisha shrine and Takashima Castle.
A day-bath facility attached to a coffee shop in the Shibu Onsen street. In a town where the nine communal baths are reserved for overnight guests, it is one of the few places you can soak without staying. The tub is ringed by the old stonework that gives the room its name, filled with clear water that runs straight from the spring with no added water and no heating. A partition divides the bath in two, and the side by the inlet runs very hot. Shampoo, body wash and dryers are provided; 600 yen for adults and 300 yen for children, 10:00 to 18:00, closed Tuesdays. It stands right off the street, which makes it easy to fit between other stops.
A Japanese-modern inn at the centre of Shibu Onsen, where two springs of different character are blended and run flow-through, and day visitors can use them too. Day bathing costs 1,500 yen for adults and 800 yen for elementary pupils (tax included), with a bath towel and a face towel provided. Reception runs 9:00 to 12:00 and 14:00 to 19:00. The great baths close for cleaning at times such as 12:00 to 14:00, and a private loyly sauna opened in 2021. There is a deep tub and an open-air bath, and after bathing you can rest on the first and fourth floors. Overnight guests receive keys for the nine-bath tour.
An inn on the shore of Lake Suwa with a spring-water bathing floor on the 14th storey of the main building. Soranoyu, where you look down on the lake from 45 metres up, is the signature bath, with a sauna and cold plunge. Day bathing is taken from 12:00 to 14:00 and may be used until 15:00, at 1,600 yen for adults and 800 yen for children aged 4 to elementary school, which includes a bath towel and a face towel (1,000 yen and 500 yen without towels). Bathing is for one visit and Thursdays are closed. The annex bathing house runs 10:00 to 22:00 at 1,000 yen for bathing alone and 2,300 yen with the rock sauna.
A public bath of Bessho Onsen named after the monk Ennin, known as Jikaku Daishi, who is said to have bathed here. It draws source no. 3 straight through with no recirculation and opens at 6:00 in the morning, so it is good for an early soak. It costs 300 yen for adults and closes on Thursdays. Standing in the middle of the spa street, it is a convenient base for walking the three outer baths with the Kannon temple and the great gate.
A hot-spring hotel at Kumanoyu Onsen, deep in Shiga Kogen at about 1,700 m. Its jade-colored sulfur spring (100% free-flowing, no added water, no heating, no recirculation) contains all three of Japan's great beauty spring types — bicarbonate, sulfate and sulfur. Day bathing is available.
A day-bathing facility at the heart of Asama Onsen in Matsumoto, Nagano, in a hot-spring area that has been flowing for over 1,300 years. Its weakly alkaline simple spring (colorless and clear) fills an open-air bath and a large indoor bath, and it stays open until midnight.
A long-established inn in the heart of the Yudanaka Onsen district, Yamanouchi, Nagano. Just a 6-minute walk from the Yudanaka Station-front bath Kaede-no-Yu, it is a popular base for visiting the Snow Monkeys of Jigokudani. The inn's bath is open to day bathers too: reception 10:00-17:00 at 500 yen for adults and 250 yen for children - as affordable as the station-front bath. Its appeal is soaking in softly flowing spring water in a quiet inn bathroom, away from the crowds of the station facility. Day bathing may be unavailable with groups or on occasion, so calling ahead (0269-33-2151) is recommended. Combine it with the Shibu Onsen outer-bath tour (Kuban-yu, Oyu and more) for a full day of hopping around the Yudanaka-Shibu spa area.