The only place in the world where monkeys bathe in hot springs.

The Jigokudani Yaen-koen (altitude 850 meters) is located in the Valley of Yokoyu River sourced from Shiga-Kogen of the
Joshinetsu-Kogen National Park in northern part of Nagano prefecture.
Because of the very steep cliffs and the steam coming off the springs in everywhere, ancient people called this valley ‘Jigokudani (Hell valley)’ .
Also it is buried in snow almost one third of the year. Even that kind of severe environment here is a paradise on earth for monkeys to live in.
The troops of wild Japanese macaque (they are popularly known as snow monkeys) inhabit here naturally through the ages.
Since the establishment of Jigokudani Yaen-koen in 1964, it has been a worldwide popular place for watching the bathing
monkeys in a hot spring and for ecological observation of researchers or photographers,
and some of them who visited here have accomplished certain results in the area.

14/7/2025

Monkeys appearance forecast JULY.14~JULY.21

23/5/2025

Regarding construction within the park　may 22.

27/4/2025

Monkeys appearance forecast　April.28~May.5

20/4/2025

Monkeys appearance forecast　April.21~April.27

13/4/2025

Monkeys appearance forecast　April.14~April.20

31/3/2025

Spring and summer opening hours will be in effect from April.

19/2/2025

February 19th 9:00 Information issued: Heavy snow warning

9/2/2025

February 9.we are open today.

8/2/2025

February 8th 17:00 Information issued: Heavy snow warning

8/2/2025

February 8th: Heavy snow is falling in the park.

8/1/2025

Jan.8

28/12/2024

It will be very crowded during the year-end and New Year holidays.

24/12/2024

There will be α power outage on December 25th.

9/12/2024

Monkeys appearance forecast December.16~December.23

3/11/2024

Autumn monkeys attendance probability

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