Itokoku History Museum (伊都国歴史博物館, Ito-koku Rekishi Hakubutsukan) opened in Itoshima, Fukuoka Prefecture, Japan in 2004. It supersedes the former Ito Historical Museum (伊都歴史資料館), which opened in July 1987. With a focus on cultural properties excavated from the area, the museum's collection numbers some 19,500 objects. The display includes an assemblage of Yayoi-period artefacts excavated from the (平原遺跡) that has been designated a National Treasure.