This is a report of 3 ruins where excavation investigation was carried out along with sediment collection work in 1997. Wangaru Nagatori ruins (Ogunari Nagasato Ikeki) investigated five circular mounds from the 6th century to the 7th century. The Wakaruma Takuma ruins (Mr. Takumaru Takakimaisu) investigated one circular mound. Wangaru exit ruins (Ougamaru Ichigeki) investigated a single circular mound. Both of these are valuable survey examples as an ancestral tumulus group escaping development of the Ninomori Complex that begins in 1964.