The Amidaji Kofun cluster is located on the side of a hill overlooking Kokubugawa River. The cluster consists of three -style tumuli. This is a variation of the -style square tumulus with polygonal-shaped protrusions on each of its four corners. This style is unique to the
Kibi, San'in and
San'yō regions of Japan. Tumulus No. 1 is about 17.8 meters long, including protrusions, Tumulus No. 2 is 8.8 meters long, and Tumulus No. 3 is 7.8 meters long. Parts of the slopes and protrusions were protected by river stones, similar to
fukiishi.
Archaeological excavations were conducted in 1979 and 1980.
Yayoi pottery, both ceremonial and for everyday use, was found around the protruding portions, but the
burial chambers were not excavated. Currently, the site is backfilled for preservation, and the excavated artifacts are stored in the Kurayoshi Museum. The site is located a ten-minute walk from "Kamifukuda" bus stop on the Hinomaru Bus from
Kurayoshi Station on the
JR West San'in Main Line. ==See also==