Sone tideland facing the Seto Inland Sea from Sone, in Kitakyushu-city and is one of the
largest tideland in the Seto Inland Sea ; it is about 5 km offshore with an area of about 517 ha.
The tideland is the home to some 326 species of benthic animals in the tidal flat, including a
handful of endangered species, like the ancient horseshoe crab that has not changed since the
age of dinosaurs. Several endangered birds are seen during the summer, like the Saunders’s
Gulls, Eastern Marsh Harrier, and the Intermediate Egret.
Horseshoe Raising house, the ecology of the horseshoe can be learn here.