01 / Shiokawa
From the limestone bedrock,highly salty groundwater flows out.
Shiokawa in Sakimotobu is a spring where groundwater with a high salt concentration flows out of the limestone bedrock, and it was designated a national Natural Monument in 1972. A paper records plants and animals of sea, brackish and fresh water near the spring, and considers that inland groundwater and seawater mix underground before flowing out.
- 15 May 1972: national Natural Monument
- Salty groundwater from limestone bedrock
- Sea, brackish and fresh water life

