Irimizu Shonyudo

Entrance fee (cash only)

*A reservation is required for Course C. Visitors cannot enter the course without a guide.
The fee for the Course C includes guide service and entry for up to five people per visit.

An underground world that will pique your sense of adventure – A real world of adventure!

Irimizu Shonyudo, which has been designated as a National Natural Treasure, is a limestone cave where visitors can experience a real taste for full-on spelunking.
Cave temperature is 12°C - 13°C, and the cave is wet and slippery.
The narrow cave runs a total of 900m from beginning to end and is divided into A, B, and C courses.
Course A is lit and you can enter wearing normal clothes.
For Courses B and C, you should bring a change of clothing that you don’t mind getting wet.
Little work has been done on the cave from Course B and beyond. Visitors will be in cold (10°C) water up to their knees as they make their way by ducking and crawling through the gaps in the cave by flashlight or candlelight.
Candles, raincoats, rubber sandals, and so on are available for purchase or rent from the office at the entrance.