Mu Valley

YAMASHIROInformation of the Region

Subterranean Kingdom Mikawa Mu Valley地底王国 美川ムーバレー

* The locals don't speak English regularly, but they are ready to welcome you and convey the fascination of Yamashiro.

The Subterranean lakes and waterfalls lead you to a different dimension – a place of unforgetable memory

Mikawa Mu Valley is an adventure theme park built on the site of an ancient  mine, and is ranked high in the ranking of outdoor leisure facilities in Yamaguchi Prefecture. There are adventure routes with different difficulty levels, which can be enjoyed by adults and children alike. It is also ideal for family outings. Even in the summer, the temperature in the kingdom is less than 17℃(63℉), and it is another reason why it is so popular as a summer leisure activity.
Let’s go on an underground adventure with a guidebook!
There are also restaurants, bathing facilities, and shops in the park. – for you too.

Theme park admission fee – tax included

1,980 yen for adults – junior high school students and above
990 yen for children – 4 years old to elementary school students
Free for children under 3 years old
* Advantageous Web Advance Tickets are on sale

Gold dust digging / natural stone digging experience fee

770 yen / person


  • Address: 1564-1 Nekasa, Mikawa-machi, Iwakuni -shi, Yamaguchi
  • TEL: 0827-77-0111
  • Business hours: Opening hours: 10:00-16:00 Closed on Tuesdays and Wednesdays (open during summer vacation and holidays)
  • Access: About 30 minutes by car from Iwakuni IC via Route 187
Open google map Official website

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