No. 72 · Hokkaido
Kawayu Onsen
Kawayu Onsen ranked No. 72 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 Kawayu Onsen
Facility-level figures; blank town-wide averages are not inferred.
Named facility records for Kawayu Onsen. Figures marked “Not published” are not treated as town-wide averages.
| Facility | Spring | Source data | Supply | Bath type |
|---|---|---|---|---|
| Kawayu Onsen Public Bath | The individual public-bath page calls it a simple alkaline spring; the Kawayu area page calls it a sodium bicarbonate-chloride spring. The official descriptions differ, so both are retained. Source: Spring water piped from the sources rising through the bed of the Oto River; the individual source name is not published. | Source temperature: The facility-specific value is not published. Kawayu Onsen's area reference of 73°C is not assigned to this bath. pH: Not published in the current material summarized here. | The tourism association says the communal bath draws spring water that rises from the riverbed of the Oto River. Current individual pages do not publish water addition, heating, circulation or disinfection conditions for the bath. | Day-use bath. The strongest low-cost choice for a communal bath in Kawayu. During September high water, treat the public bath as the reliable option rather than planning around the riverside natural bath. |
| KKR Kawayu (Day-Use Onsen) | Acidic iron(II)- and carbon-dioxide-bearing sodium chloride-sulfate spring Source: Kawayu Onsen sources at 1-chome 8 and 10, as listed by the inn | Source temperature: Not published for this property pH: 1.8 | The inn describes the indoor and outdoor baths as 100% free-flowing spring water. Fixed bath temperature, heating and disinfection conditions for each bath are not detailed on the current page. | Ryokan. A balanced first choice for a Kawayu day trip if you want an outdoor bath, free-flowing water and a clear price. The tattoo restriction is explicit, and the strongly acidic water is not one to rush into. |
| Hotel Kitafukuro (Day-Use Onsen) | Strongly acidic natural hot spring; a complete current chemical classification was not available in the research material checked Source: The hotel's own-use Kawayu Onsen spring; the current pages do not publish an individual source name | Source temperature: 53°C at the source pH: 1.8 | The inn describes the baths as 100% free-flowing. Spring water goes directly from the source to the baths without a storage tank; inflow is adjusted to control bath temperature. A forest-facing outdoor bath is available. | Ryokan. A strong pick for the forest setting and transparent spring-to-bath setup. Check the current operating notice first, since the hotel is still in an equipment-work phase. |
Destination comparison
What this onsen town offers
History
70/100Spring character
73/100Town culture
71/100Seasonal scenery
72/100Access
72/100Local history
How the town developed
Four seasons
Seasonal conditions and travel rhythm
Plan your stay
Kawayu 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.
Yunomine, Kawayu or Watarase? A Day-Trip Guide to Hongu OnsenkyoOne-night stay
Compare the ryokan’s bath access with public day-use options and the journey back to your next stop.
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.
Lake Akan or Kawayu Onsen? Choosing Between Lake Views and Volcanic WaterNearby destinations
Other places in the same prefecture in the published ranking.
Related guides
Guides to Kawayu Onsen
Filter English guides by the question you need to answer.
ComparisonsLake Akan or Kawayu Onsen? Choosing Between Lake Views and Volcanic Water
Compare Lake Akan and Kawayu Onsen for scenery, spring water, day-use bathing and public transport. See which eastern Hokkaido base fits your trip.
Read the guide
ComparisonsKawayu Onsen Day Baths: KKR, Hotel Kitafukuro and Yukichi Compared
Kawayu’s three day-use baths differ in hours, price and spring character. Kawayu-Onsen Station sits outside the bath district, so budget for the short ride.
Read the guideDay-use bathsYunomine, Kawayu or Watarase? A Day-Trip Guide to Hongu Onsenkyo
Compare Yunomine’s World Heritage Tsuboyu, Kawayu’s river bathing and Watarase’s large outdoor bath; check the return bus before visiting.
Read the guideOfficial sources
