Oni-no-iwa Kofun (鬼ノ岩屋古墳) is a pair Kofun period burial mounds, located in the Shoninnakamachi neighborhood of the city of Beppu, Ōita, on the island of Kyushu Japan. The tumuli were designated a National Historic Site of Japan in 1957 with the area under protection extended in 2017.