Tsukuriyama Kofun (作山古墳) is a Kofun period burial mound located in the Misu neighborhood of Sōja, Okayama Prefecture, in the San'yō region of Japan.

The Tsukuriyama Kofun is a zenpō-kōen-fun (前方後円墳), which is shaped like a keyhole when viewed from above, orientated to the southwest.

The tumulus has never been excavated, so details of the burial chamber are unknown; however, it is presumed to be intact, since no indication of robbery pits have been found.

Most of the items unearthed from the Tsukuriyama Kofun are cylindrical and morning glory-shaped haniwa, and the total number is estimated to be as many as 5000.

Media related to Tsukuriyama Kofun (Soja) at Wikimedia Commons