[1] It is one of the largest burial mounds in Ōita Prefecture, along with the Ogumayama Kofun in Kitsuki, and is estimated to have been constructed in the Toyokuni area in the early 5th century (mid-Kofun period).

The Kamezuka Kofun is located on a hill on the west bank of the Nyu River mouth.

The tumulus was covered with white quartz stone as fukiishi and surrounded by cylindrical haniwa.

[2] Although little maintenance had been performed on the tumulus prior to its designated as a national historic site in 1996, the mound was in relatively good preservation.

The site is a 30-minute walk from Sakanoichi Station on the JR Kyushu Nippō Main Line.