稲積水中鍾乳洞

Inazumi suichu shonyudo - Inazumi suichu Limestone Cave - Inazumi Underwater Cave

Useful Information

Location:	300 Miemachi Nakazuru, Bungoono, Oita 879-7263. (32.899885, 131.542746)
Open:	All year daily 9-17. [2022]
Fee:	Adults JPY 1,300, Children (12-17) JPY 1,000, Children (4-11) JPY 700, Student JPY 1,000. [2022]
Classification:	Karst cave
Light:	Incandescent Electric Light System
Dimension:
Guided tours:	self guided
Photography:	allowed
Accessibility:	no
Bibliography:	T. Nishida, M. Ota, T. Zotsuka, A. Sugimura, A. Fujii, T. Haikawa, K. Yoshimura, M. Noda (): Geology and Speleology of the Inazumi-yama District. Mie-machi, Ono-gun, Oita Prefecture, Japan, Journal of the Speleological Society of Japan, Volume 2 K. Yoshimura, K. Urata, H. Schwarcz, D. Ford (2003): U-series dating of a speleothem from Inazumi Cave, Oita Prefecture, Japan, J. Ion Exchange, 14 (Suppl.), 225-228,2003.
Address:	Inazumi Limestone Cave, 300 Miemachi Nakazuru, Bungoono, Oita 879-7263, Tel: +81-974-26-2468, Tel: +81-974-26-2469. E-mail:
As far as we know this information was accurate when it was published (see years in brackets), but may have changed since then. Please check rates and details directly with the companies in question if you need more recent info.

History

1976	discovered by cave divers from the .
1977	opened to the public.
2014	underwater survey.

Description

稲積水中鍾乳洞 (Inadzumi suichūshōnyūdō, ) is a river cave with many sumps. It was discovered only 30 years ago by cave divers. After two sumps the cave divides into two branches, the left one is dry and developed as a show cave, the right branch is water filled with several more sumps. Both branches are about 200 m long.

The cave entrance is the spring of a small river, which produces 30,000 to 40,000 m³ per day. It is a tributary of the Nakatsu river.