Shichikannon Kofun is a round mounded tomb located adjacent to the outer moat of Richu-tenno-ryo Kofun , on the northeast side of its round rear part. Given its position, this tomb is considered to be related to Richu-tenno-ryo Kofun as a satellite tomb.
The mound’s diameter is 33 m, and its height 3.8 m.
Cylindrical haniwa have been excavated from the mound.
The construction period dates to the first half of the 5th century.