Ryoguzan Tomb and its moat.
Visit to Ryoguzan Tomb, One of the Greatest Old Kofun in Okayama
1. Introduction Ryoguzan Tomb (両宮山古墳) is a keyhole-shaped burial mound located in Akaiwa City, Okayama Prefecture, Japan. It is a key-hole shaped tomb (前方後円墳) with a total length of 206…