Kuronagi hot spring *****

A hidden hot spring of Kurobe gorge and the source of Unazuki


Kuronagi hot spring is in Kurobe valley of Toyama Ken which is the unexplored regions. We can't go to Kuronagi hot spring by car. We go to there by truck train of Kurobe Kyouku Tetsudo Line. It is closed in winter because a railroad doesn't move. We can go to there in the period when it doesn't snow.

Kuronagi hot spring is the source of Unazuki hot spring. All the hot water of Unazuki is brought from Kuronagi hot spring. The hot springs of the high temperature appear at every place of the river bank in the River.

There is an open-air bath on the left of the river bank.


Kuronagi, Unazuki-machi, Toyama ken
TEL : 0765-62-1820 (Kuronagi hot spring inn)

contact place in Unazuki TEL:0765-62-1802

day : May, 1998


There is an open-air bath at a distance of about 100m from Kuronagi hot spring Onsen Ryokan (Japanese inn). It is mixed bathing. A bathtub is wide, and you can enjoy the river sound of the rapid stream and scene of the Kurove valley.

The hot spring is colorless, and has faint smell of sulfur. As the water is tepid, we can take a long bath. The source is high temperature. It is adjusted to be suitable temperature to take a bath.

The large tents for dressing room for men and women respectively are at the open-air bath's side. A woman may shrink back to take a bath because it is an open atmosphere. The special hours for women (only hotel guest) is set up.

People except hotel guest pay a charge for taking a bath at Onsen Ryokan (Japanese inn). You can take the inside bath (of course, this is a hot spring, too). You can wash with soap in the inseide bath.

A hot spring entrance inside the tunnel


Business hours From the daybreak to at 21:00
Closure day open throughout the year.
However, these is closed from November to April because truck train is suspended.
Charge 500 yen


You get off in the third station, Kuronagi station from Unazuki station of Kurobe Kyouku Tetsudo Line. You go into the tunnel on foot along a rail for the second Kuronagi power plant to branch off from Kuronagi station.

There is a byroad to Kuronagi hot spring when you go about 100m through the tunnel. You reach Kuronagi Onsen Ryokan (Japanese inn) when you walk in the byroad for about five minutes and leave a tunnel.

You can park your car in the parking lot in front of Unazuki station.
Charge : 900 yen/day

Kuronagi Onsen Ryokan (hot spring Japanese inn)

Kuronagi Onsen Ryokan is like a cottage. There is the atmosphere of old hot spring resort.

This is to protect the source area of Unazuki hot spring. The manager of the Japanese inn is the president of the supply company of the hot spring.

There is neither a television nor a radio.There is only one television in the entrance. you can see only 1 channel. Here is very quiet, and you hear only the sound of the river.

The inside bath is new. The inside bath loverlooks the flow of Kuranagi river and the waterfall (Yugiri-no-taki).

The acoomodation charges is 9000 yen.
You can cook your own meals. The accomodation charge is 4000 yen.


There are many edible wild plants in the side dish. It's very delicious. There is the char grilled with salt is in the menu. If you order in advance, you can drink the Kotsu-sake (sake containing the bone of char).

Flood damage

There was flood damage in 1995-year (the 7th year of Heisei). The water level of the river rose more than 5m. The most part of the building was washed away. An open-air bath was washed away, too.
The supply of the hot spring water to Unazuki hot spring was stopped. They dug up a river, and recovered a source.The open-air bath and inside bath were remodeled at that time.

Best season

May, September and October As the truck train is sometimes suspended due to the heary rain in the rainy season, you can't come back to Unazuki station from here. There is infested with horsefly which sucks the blood of the person (the name is Ororo) in summer. We can't take a bath in the open-air bath. As the trees turns red in autum , you can enjoy the wonderful view. We think that autumn is best season to visit here.

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