Futatsuzuka Kofun is a keyhole-shaped mounded tomb constructed on the east side of Ojin-tenno-ryo Kofun [33-1], adjoining its inner bank. It is thought to be related to Ojin-tenno-ryo Kofun as a satellite tomb.
The mound length is 110 m, and the height of the round rear part is 9.9 m.
Cylindrical haniwa have been excavated from the site.
The construction period dates to the second half of the 4th century.