In view of these remains, the central area of the Shirakawa region from the late sixth century to the early eighth century is presumed to have been this area (the southern part of Izumizaki Village, Nishishirakawa County, Fukushima Prefecture and the northern part of Shirakawa City) and these remains including Izumizaki Yokoana Cave are important for making clear the changes from the era of Shirakawa no Kuni no Miyatsuko (regional administrator of Shirakawa Province) to the ancient Shirakawa County.
これらの遺跡より、6世紀後半から8世紀初めまでの白河地方の中心地はこの一帯（福島県西白河郡泉崎村南部・白河市北部地域）と推定され、泉崎横穴を含めたこれらの遺跡群は白河国造から古代白河郡への変遷を解明する上で重要である。