Yunoyama Onsenkan: Hiroshima’s 23.5°C Waterfall Bath

At Yunoyama Onsenkan, the cold spring is the main event. Water falls from a rock face about four metres above the ground into an outdoor cascade; inside, a separate bath is heated to around 41°C. It is an unusual combination, not a resort-style complex with a long list of pools, sauna rooms and places to spend half a day.

What the ¥450 ticket covers

The operator says the listed prices include the bathing tax.

Shampoo, conditioner, body wash and hair dryers are available, and coin lockers are free.

The bathing area is modest: a gender-separated indoor bath, washing stations and the outdoor cascade. There is no sauna or ordinary outdoor soaking pool listed by the operator. If you want a broad spa circuit, restaurants or a place to relax for hours, this is not the right facility. The reason to come is the cold spring and the historic setting.

The spring is cold; the indoor tub is not

Yunoyama’s spring is classified as a simple radioactive spring. The operator lists the source at 23.5°C and says the indoor bath is heated to about 41°C. The outdoor waterfall uses the unheated spring water, so that is where visitors encounter the cold temperature directly. It is separate from the warmer indoor bath.

The cascade falls from a rock face roughly four metres high. That concentrated stream feels very different from stepping into a cold plunge pool; give yourself time to get used to it rather than assuming it will feel like an ordinary shower. The operator describes alternating between the heated indoor bath and the spring cascade, but there is no need to treat that as a prescribed routine.

The old therapeutic-bath setting is part of the visit. The spring was developed as a bathing place in 1750, and the current bathhouse stands at the back of the Yunoyama area. The historic context is genuine, but it does not change the facility’s simple layout or its remote location.

Confirm the opening time before travelling

The operator’s current facility page lists seasonal hours:

There is no fixed weekly closing day; maintenance closures can occur. One detail remains unresolved: the operator’s linked 2026 fee PDF says 10am opening, while its live page and Hiroshima’s official tourism listing say 9am. If the difference affects your bus or an early start, call the facility at 0829-83-0802 before leaving. The posted single-visit and day-ticket prices match across the current pages.

Getting there is the bigger decision

By car, Hiroshima’s official tourism site estimates about 20 minutes from Kake Smart Interchange or 35 minutes from Itsukaichi Interchange. There are five dedicated spaces and roughly 40 additional free spaces nearby.

Public transport is possible, but it is not a quick hop from the city centre. Hiroshima’s tourism guide currently lists a bus from Itsukaichi Station South Exit to Ohashi, around 60 minutes, followed by a 30-minute walk. Another option is to transfer at Ohashi to a bus towards Usa, get off at Yunoyama Onsen and walk about ten minutes. Services are limited, so check the actual return timetable as well as the outbound trip; do not plan around the bath’s closing time alone.

That access makes Yunoyama a better fit for a car-based day in Yuki or for visitors who specifically want the cold cascade. For a convenient city-side soak, choose a Hiroshima facility closer to your other plans rather than spending much of the day on transfers.

If you are comparing published spring temperatures, our guide to onsen water temperature explains why a source reading and the temperature of a bathing pool are different facts. The guide to reading spring-quality records covers the limits of labels such as “radioactive spring.”

Sources

- [Yunoyama Onsenkan: current fees, hours, bath details and spring classification](https://www.yuki-lodge.jp/yunoyamaonsenkan.html) - [Yunoyama Onsenkan: operator’s 2026 fee and hours PDF](https://yuki-lodge.jp/usage-fee2026.pdf) - [Dive! Hiroshima: Yunoyama Onsenkan access, hours and admission](https://dive-hiroshima.com/explore/369/) - [Dive! Hiroshima: Yunoyama Onsen and its cold-spring cascade](https://dive-hiroshima.com/explore/1167/) - [Hiroshima City: notice on the bathhouse reopening after repairs](https://www.city.hiroshima.lg.jp/shisei/kouhou/1004010/1033044/1033046/1035818.html)

Checked: 27 September 2026. Hours and unplanned maintenance closures can change; confirm directly if timing is tight. Tags: Yunoyama Onsenkan, Yunoyama Onsen, Hiroshima onsen, Hiroshima day-use onsen, cold spring, 23.5°C spring, waterfall bath, Yuki Hiroshima, radioactive spring, onsen access, Hiroshima without a car, Hiroshima road trip, Japanese hot springs, Central Japan travel, onsen guide