The Ōyasuba Kofun cluster (大安場古墳群, Ōyasuba Kofun gun) is a group of five early to middle Kofun period megalithic tumuli located in what is now part of...

and square-type (hōfun [ja] (方墳)) kofun. Orientation of kofun is not specified. For example, in the Mozu kofun group, in Sakai, several of the circular...