Type: Front Square Back Circle Kofun with Moat.
Size: 148m wide in total. Diameter of back circle is 76m and 14m tall.
Built in: Late 5th century.
The person buried: Emperor Hanzei.
Emperor Hanzei Kofun is 7th biggest Kofun in Mozu. The hill of tomb has 3 steps and it used have 2 layers of moat. Because it is very small Kofun as the emperor compares to the others, Nisanzai Kofun could be Emperor Hanzei Kofun.