Yayoi pottery and stone tools were discovered on the site in 1898 and full scale archaeological excavation began from 1956.

Within the settlement were over 1000 underground storage pits, which were found to contain carbonized grains such as rice and wheat, as well as seeds such as yew, peach, and chestnut, as well as bones of wild boar, Sitka deer, Japanese raccoon dog, and whales, as well as red sea bream, and clams, including abalone.

More than 2,000 earthenware items, including large pots, earthen weights, spindle wheels and human-faced figurines were found.

Despite a restraining order the following morning, destruction continued, with Shizuo Horie, the president of Hisagoya announcing that it would be impossible to mine the silica sand in the area once it was designated as a cultural property, and as no compensation from the government was expected, he would continue to exercise the company's mining rights.

[3]、[4][5]。 The adjacent Shimonoseki City Archaeological Museum not only exhibits excavated artifacts, but also holds regular general education courses and workshops on how to make clay flutes and magatama.