Mukibanda Yayoi Archaeological Remains were discovered by accident when the site was under preliminary investigation for the construction of golf course from 1995 to 1998. The remains stretch for 156 hectares, which is five times larger than Yoshinogari Remains in Saga prefecture, which had been said to be the biggest remains of Yayoi period in Japan at that time. (*Yoshinogari Remains stretched for 32 hectares at that time. As investigations have proceeded, it turns out to be as twice as large.)

Mukibanda remains are on the hillside. You can see the panoramic view of the Japan Sea from the remains. The remains are thought to be the center of ancient Izumo Kingdom flourished in the late Yayoi period. 420 pit houses, other 500 shacks and 34 ancient tombs are discovered at present (2010).