Trip Info
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Taxi
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MCAS Base or Customer location
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All Season
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Cash
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Iwakuni City
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English, Japanese
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90
Overview
Mikawa Mu Valley is an underground adventure park in Iwakuni, Yamaguchi, where visitors explore a mysterious cave system inspired by the legend of the lost Mu civilization. The self-guided underground walk through tunnels and themed areas usually takes about 60–90 minutes.
Admission (tax included):
- Adults (13 years old and above): ¥2,400
- Children (6-12 years old): ¥1,200
- Children (0-5 Years Old): Free
Additional experiences like gold panning or gemstone hunting are extra.
Extra experience price:
Gemstone Hunting: ¥880 (20 minutes)
Gold Panning: ¥990 (30 minutes)
Important Note:
This itinerary is designed for independent exploration. Kounai will provide comfortable transportation to the Mu Valley (transportation is not included in the package price; we will email you the final price including transportation).
Taxi Fee:
Compact Taxi (Max 3 people): ￥3,000 for 30 minutes
Van Taxi (Max 8 people): ￥5,000 for 30 minutes
Highlights
- Explore a mysterious underground world set inside a natural limestone cave.
- Join a real-life treasure hunt — solve puzzles and follow clues through tunnels and caverns.
- Discover the legend of the lost civilization of “Mu”, a blend of adventure and imagination.
- Enjoy a cool and comfortable temperature year-round, perfect for summer visits.
