Terayama-minamiyama Kofun is a square mounded tomb located next to the outer moat of Richu-tenno-ryo Kofun , on the northeast side of its round rear part. Since they share the moat, this tomb is considered to be related to Nintoku-tenno-ryo Kofun as a satellite tomb.
The mound has a rectangular plan and has been reconstructed with dimensions of 45 m in a northeast-to-southwest direction and 36.3 m in a northwest-to-southeast direction.
Cylindrical haniwa were arranged on the terraces, and the oldest discovered Sue ware (stoneware produced using techniques that had just arrived from the Korean peninsula) was found on top of the mound.
The construction period dates to the first half of the 5th century.