Tsukuriyama Ancient Burial Mound, Archaeological burial mound in Kita-ku, Japan

Tsukuriyama Ancient Burial Mound is a large earthen structure shaped like a keyhole, consisting of a rectangular section linked to a circular mound. The construction demonstrates the sophisticated building methods of the period and functioned as a royal or elite burial site.

This structure was built during the first half of the 5th century when the Kofun period was at its height. The mound represents how societies of that era honored their deceased and invested in monumental construction.

The shrine on the flattened anterior section is Aragami Shrine (荒神社). Its chozubachi water basin is the hollowed body of a tuff sarcophagus, and lid fragments lie behind the shrine; the coffin was likely dug out by robbers, perhaps from Shinshō Chikazuka Kofun. The mound's name is read 'Zōzan' locally to distinguish it from Sōja's Tsukiyama Kofun.

The visitor center opened in April 2020. The mound is freely accessible, unlike the three larger imperial tombs, which are closed to the public. The climb to the flattened top is steep, and a hamlet occupies the southeastern end of the mound.

The mound's summit was levelled by Mōri forces, who built earthworks, two enclosures and three vertical moats there while facing Toyotomi Hideyoshi's army during the Chūgoku campaign. The shrine's water basin is the hollowed body of a tuff sarcophagus, its lid fragments lying behind the shrine.