Magodayuyama Kofun is a scallop shell-shaped mounded tomb located on the south side of the square front part of the Nintoku-tenno-ryo Kofun [2-1]. It is considered to be related to Nintoku-tenno-ryo Kofun as a satellite tomb.
The square part of the mound has been modified; this part and the surrounding moat are reconstructions based on the result of the excavation conducted when Daisen Park was developed. The mound is 65 m long, and the round rear part is 7.7 m high.
Both cylindrical and representational haniwa have been excavated from the moat.
The construction period dates to the first half of the 5th century.