 It is approximately one hour 45 minutes on foot from Tenryū Hamanako Line Chibata Station.The presence of ruins in the Ōchiwa Pass was known for many years; however, there was no mention of any settlement in literature, and the nature of these ruins was unknown.Starting in 1989, the Kosai City Board of Education conducted excavation surveys for seven years, discovering the foundation of twelve buildings, remnants of a pond with gardens.