Hachiman Kannonzuka Kofun (八幡観音塚古墳) is a Kofun period burial mound located in the Hachiman neighborhood the city of Takasaki, Gunma Prefecture in the northern Kantō region of Japan. The site was designated a National Historic Site of Japan in 1948. The site dates from the late 6th century AD, and many of the grave goods discovered during the archaeological excavation were designated National Important Cultural Properties in 1961