No. 42 · Nagano
Yudanaka Onsen
Yudanaka Onsen ranked No. 42 in the published 2025 Japan hot-spring destination list. Check bathing options, access and stay details before planning your visit.
Spring information
Water and bathing details for Yudanaka Onsen
Facility-level figures; blank town-wide averages are not inferred.
Named facility records for Yudanaka Onsen. Figures marked “Not published” are not treated as town-wide averages.
| Facility | Spring | Source data | Supply | Bath type |
|---|---|---|---|---|
| Kaede-no-Yu, Yudanaka Station-Front Onsen | Sodium chloride-sulfate hot-spring system. Yamanouchi Town confirms natural source-flowing water; existing national transport ministry information lists sodium, chloride and sulfate components. Source: Yudanaka Onsen; the current main page does not name the individual spring used by Kaede-no-Yu. | Source temperature: About 91.7°C in existing Ministry of Land, Infrastructure, Transport and Tourism information; this is not a 2026 re-sampling. pH: Not published. | Yamanouchi Town identifies natural source-flowing water and indoor and outdoor baths. Existing national government information says high-temperature source water is adjusted to bathing temperature. The 2026 main page does not publish the amount of added water or pool-by-pool circulation and disinfection details, so none are inferred. | Day-use bath. The most straightforward option for a single soak by Yudanaka Station, with full washing facilities and a place to rest. For a tour of local communal baths, use the 2026 outdoor-bath pass instead. |
| Yudanaka Oyu Public Bath | At the resort level, Yudanaka's main spring types are chloride and sulfate springs. A current chemical classification for Oyu itself is not published, so resort-wide averages are not treated as this bath's analysis. Source: Yudanaka Onsen; the individual spring used by Oyu is not named. | Source temperature: Not published for Oyu. Yamanouchi Town's 65–93°C range describes Yudanaka Onsen overall and is not substituted for this bath. pH: Not published. | The 2026 official outdoor-bath pass confirms access to Oyu. Pool-specific water addition, heating, circulation, disinfection and source-flow conditions are not published in the current pass information. | Day-use bath. Now included in Yudanaka's 2026 outdoor-bath pass, this is a good way to experience local communal-bath culture. Do not treat resort-wide spring averages as measurements for this individual bath. |
| Wata-no-Yu, Yudanaka Onsen | Yudanaka's area-wide spring types include chloride and sulfate springs. A current chemical classification for this individual bathhouse is not published, so area averages are not treated as its analysis certificate. Source: Yudanaka Onsen; the individual source used at Wata-no-Yu is not published. | Source temperature: Not published. Yamanouchi Town lists 65–93°C for Yudanaka Onsen overall; those figures are not assigned to this bathhouse. pH: Not published. | The 2026 official public-bath pass confirms that pass holders can use Wata-no-Yu. Current pass information does not specify water addition, heating, circulation, disinfection or source-flow conditions for this bathhouse. | Day-use bath. Wata-no-Yu is now included in Yudanaka's 2026 public-bath circuit. It suits visitors interested in local bathhouse culture, but its individual spring data should not be confused with averages for the wider Yudanaka area. |
Destination comparison
What this onsen town offers
History
89/100Spring character
73/100Town culture
94/100Seasonal scenery
75/100Access
86/100Local history
How the town developed
Four seasons
Seasonal conditions and travel rhythm
Plan your stay
Yudanaka Onsen: day trip or overnight?
Compare travel time, bath access and the time you want to spend in town.
Day trip
Check the first and last transport connections, then confirm which baths accept day visitors and when they stop admitting guests.
Tokyo to Ikaho: Choose Between the Direct Bus and ShibukawaOne-night stay
Compare the ryokan’s bath access with public day-use options and the journey back to your next stop.
Yudanaka Seifuso: Is the Free Private Cypress Bath Worth Booking?Stay plus a day bath
Choose one bath experience for your stay and use a day facility for a different source or setting, where the published details support it.
Tokyo to Ikaho: Choose Between the Direct Bus and ShibukawaNearby destinations
Other places in the same prefecture in the published ranking.
Related guides
Guides to Yudanaka Onsen
Filter English guides by the question you need to answer.
Getting thereTokyo to Ikaho: Choose Between the Direct Bus and Shibukawa
Compare the direct Shinjuku bus, trains via Shibukawa and driving to Ikaho. Check transfers, booking points and the seasonal Haneda service before you go.
Read the guide
Getting thereIkaho Without a Car: A Half-Day Route from Shibukawa Station
Plan four to six hours for Ikaho’s stone steps, ropeway and one bath; check the return bus and take the ropeway before it closes.
Read the guide
Destinations & itinerariesIkaho in Winter: Check the Ground Before You Climb
Plan for winter roads and icy stone steps in Ikaho. Check Shibukawa’s live cameras, bus conditions, ropeway maintenance dates and seasonal bath hours.
Read the guide
Sento & public bathsKairyouyu or Bunka Yokusen? Two Modern Tokyo Sento Compared
Compare Shibuya-side Kairyouyu with later-closing Bunka Yokusen near Ikejiri-Ohashi; both charge ¥600 and neither is a natural spring.
Read the guideSento & public bathsKairyouyu in Shibuya: A Modern Sento with a Whale on the Wall
This redesigned bathhouse blends its 1916 history with carbonated and soft-water baths and a sauna. Adult entry is ¥600; Saturday opening is occasional.
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Private bathsYudanaka Seifuso: Is the Free Private Cypress Bath Worth Booking?
Stay two minutes from Yudanaka Station and use Seifuso’s free lockable cypress bath when it is empty. Check shared bathrooms, meals and room details.
Read the guideGetting thereWhere to Stay in Yudanaka and Shibu Onsen: Station Access or Bathhouse Streets?
Choose a Yudanaka station-area inn for simpler transfers, or stay in Shibu Onsen for its nine public baths and evening streets.
Read the guideGetting thereYudanaka and Shibu Onsen Day Trip: A Simple Route from the Station
Choose Kaede-no-Yu by the station, Yudanaka’s 2026 bath-hopping ticket or Shibu Oyu; their opening hours and entry rules differ.
Read the guideDestinations & itinerariesYudanaka and Shibu Onsen Through the Seasons: How to Plan Around the Weather
Plan Yudanaka and Shibu around seasonal walking and daylight. Shibu’s nine-bath key is for inn guests; day visitors can use Oyu during listed hours.
Read the guideDestinations & itinerariesOne Night in Yudanaka and Shibu Onsen: An Easy Two-Day Plan
Stay in Shibu for its inn-guest bath circuit, then choose a station-side bath or Yudanaka stop the next day around your departure time.
Read the guideComparisonsYudanaka and Shibu Onsen: Can You Visit for the Day, or Should You Stay?
Compare 2026 Yudanaka bath tickets with Shibu Oyu day use. The full nine-bath circuit is reserved for guests staying at a Shibu inn.
Read the guideComparisonsPrivate Onsen Stays in Yudanaka and Shibu: What “Private Bath” Means
At Yudanaka Seifuso, guests can lock the hinoki bath for private use when it is free. That is not the same as booking a room with its own onsen.
Read the guideComparisonsYudanaka or Shibu Onsen? Compare Station-Side Stays and Seifuso
Choose a Yudanaka or Shibu ryokan by weighing train access, Shibu’s guest-only nine baths, and Seifuso’s free private-use cypress bath.
Read the guideOfficial sources
