Akiyama Kofun Group

The Akiyama Kofun Group is a group of burial mounds in Akiyama, Kodama-machi, Honjo-shi, Saitama Prefecture, Japan. It is a designated historic site of Honjo-shi. The surviving group includes two keyhole-shaped mounds and a total of 43 kofun, while nearly 100 are thought to have existed when sites where the mound itself has been lost are included.

The mounds are concentrated in the Tsukahara, Tsukuma and Shukutabo districts of the Akiyama area. Akiyama Kōshinzuka Kofun retains a 16 meters circular mound, with stone facing and fragments of haniwa confirmed on it. Excavation found two surrounding ditches, measuring 34 meters in diameter and 74 meters in outer diameter, around a stone burial chamber.

Akiyama Kōshinzuka Kofun has a horizontal stone chamber 7.74 meters long, slightly wider in the middle and open to the south-southwest. More than 120 grave goods, including horse fittings, weapons and ornaments, were excavated from its inner chamber in 1958. The mound was built in the latter half of the 6th century, with three later burials added by the first half of the 7th century.

The Akiyama Kofun Group was designated a historic site by Kodama-machi on March 1, 1965. Finds from Akiyama Kōshinzuka Kofun were designated municipal-designated tangible cultural properties on January 1, 1988. In Japan, kofun are monumental burial mounds built mainly between the middle of the third century and the early seventh century CE; they include keyhole-shaped, round, double-rectangle and square forms.

Akiyama Kofun Group is a megalithic mound (tumulus with integral stones) in Japan. A typological estimate: 250 CE to 650 CE. No English Wikipedia article exists for it; the full text below is the Japanese article "秋山古墳群", shown in the original language.