Iinozaka Kofun Cluster

 is cluster of Kofun period tumuli located in what is now the city of Natori, Miyagi Prefecture in the Tōhoku region of northern Japan. The presence of an unusual number of large keyhole-shaped "kofun" located so close together drew attention, and the site received protection by the central government as a National Historic Site in 1976.
Overview.
The site is located on the northern side of 30-meter high hill located approximately 2 kilometers south of Natori Station in the Natori Plains. The site consists of five large "two conjoined rectangle" type (), and two square ()-style "kofun":
"Zenpō-kōhō-fun"
"hōfun"
The site was surveyed by the Natori Board of Education in 1975 and 1976, although no excavations have been conducted. From the shape and construction of the mounds and from pot-shaped haniwa which have been recovered, the tombs are believed to date from the 4th century AD. The site was endangered by the expansion of nearby housing developments in the early 1970s., but the presence of so many "Zenpō-kōhō-fun" in one location is unique, and the site received protection as a National Historic Site,
It is about a 20-minute walk from Natori Station on the JR East Tōhoku Main Line. Although the site is open to the public, there are no facilities and some of the "kofun" are covered with tees and dense undergrowth.