Richu-tenno-ryo Kofun is a keyhole-shaped mounded tomb with the third-largest mound in Japan. It is located in the southwestern part of the Mozu area. The location and the mound direction were apparently selected with considerable awareness of how it would be viewed from Osaka Bay.
The mound length is 365 m, and the height of the round rear part is 27.6 m. It had a double moat at the time of construction.
Both cylindrical and representational haniwa (earthenware funerary sculptures) from the mound have been found. The representational haniwa included a large and exceptional item in the form of a quiver-shaped haniwa, 1.4 m in height.
The construction period dates to the first half of the 5th century.