Gobyouyama Kofun shows the scale of the inner moat—many of the larger Kofun have lost their narrower outer moats. This grave site was once the okusha, or inner shrine sanctuary, for Mozu Hachiman Shrine.
The Kofun were originally bare, but the forests were allowed to grow in part to help preserve the earthworks from erosion. The forests can be spectacular in their own right.