Unazuki Onsen: Hot Spring Guide & Visitor Access

Spread across a river terrace at the mouth of the Kurobe Gorge, Unazuki Onsen opened in 1923 and is the largest hot spring town in Toyama Prefecture. Its colorless, transparent simple spring is piped in from Kuronagi roughly seven kilometers away, and its gentle touch soothes the fatigue of a day exploring the gorge. Inns line up on a terrace at about 200 meters elevation.

Highlights

A fountain in the center of the town is a symbol using genuine hot spring water. The starting station of the Kurobe Gorge Railway sits right beside the resort, so bathers often move straight from the baths to the sightseeing trolley. The autumn foliage on the surrounding slopes and the dam lake views are superb, and footbaths for a casual stop, such as Omokage and Kuronagi, dot the town. The source is hot at around ninety degrees Celsius and settles to a comfortable temperature as it travels the seven-kilometer pipeline. Beyond the baths, sights abound, including the Kurobegawa Electric Memorial Museum, the Selene Art Museum, and Unazuki Dam.

Enjoying the Seasons

Fresh green in spring, cool ravine breezes in summer, blazing foliage in autumn, and snow-viewing open-air baths in winter give the resort a different face year round. Autumn is especially popular, when the whole gorge turns to color. The trolley generally runs from spring through late autumn and suspends service in winter. After a long spell of shuttle-only service between Unazuki and Nekomata caused by disaster damage, full operation from Unazuki to Keyakidaira resumed on October 1, 2026. Restoration work continues around Keyakidaira Station, however, so you cannot go beyond the station building and the visitor center (the railway recommends allowing about an hour there).

Access and Basic Information

The nearest station is Unazuki Onsen on the Toyama Chiho Railway main line, and from Kurobe Unazuki Onsen Station on the Hokuriku Shinkansen you connect via Shin-Kurobe Station. Access from the Tokyo area is convenient. The water is a mildly alkaline simple spring. As the largest hot spring district in the prefecture, it has inns large and small, and day-use bathing facilities are available too.

Practical Travel Notes

If you combine your visit with a ride on the Kurobe Gorge Railway trolley, arriving in the morning lets you plan a route with time to spare. The trolley is popular and especially crowded in the foliage season, so arranging both tickets and lodging early is reassuring. The town is compact enough to tour on foot, with footbath hopping and souvenir-shop strolling to enjoy. As the gorge rises in elevation the temperature drops, so preparing something to throw on keeps you comfortable. It is also a plus that indoor spots enjoyable even on a rainy day, such as Unazuki Dam and the electric memorial museum, are close by.

A Quick Tip

If you plan to ride the trolley, arriving in the morning works best. During the busy autumn foliage season, book your lodging well in advance for peace of mind. Adding footbath hopping and a museum tour turns even the wait for the trolley into a fulfilling stay.

Sightseeing Checklist

• Estimated time: About 1 hour for a bath
• What to bring: A towel (on sale) and a change of clothes
• Best season: All year; the fresh green and autumn colours of the Kurobe Gorge are beautiful
• Avoiding the crowds: It gets busy at weekends, so go outside peak hours
• Nearby stops: The Kurobe Gorge Torokko sightseeing train, the Yamabiko promenade, the Unazuki Dam and the Selene Art Museum

📚 Sources

This article is compiled from tourism information for Toyama Prefecture and information published by the individual facilities. Fees, opening hours and closing days may change, so please check each facility's official information before setting out.