Mounds other than the designated historic spots were continued to be removed, and there were some incidents in which housing developers damaged Odoi mounds that were designated as historic spots in the 1960s.
史跡指定地以外ではその後も撤去が進み、1960年代には史跡指定地の御土居が宅地造成業者によって破壊される事件が何度か起こった。