| Location | Osaka Pref. |
|---|---|
| Shape | Keyhole-shaped mound |
| Mound length | 94 m |
| Period | Late 4th c. |
| Designation | National Historic Site |
A 94m-long keyhole mound on the Shinodayama hills in Uedai-cho, Izumi. Built at the end of the Early Kofun period, it is surrounded by a shield-shaped demarcated area resembling a moat. It is renowned for a pictorial-band deity-and-beast mirror inscribed Keisho 3 (239), recovered from a rear-circle burial facility. It is a National Historic Site.
The three clay-covered burials yielded bronze mirrors, iron weapons, armor, beads, and other grave goods. The Keisho 3-inscribed mirror was found outside the coffin in the central facility and is a pictorial-band same-direction-type deity-and-beast mirror, not a triangular-rimmed mirror. The assemblage is collectively designated an Important Cultural Property.
The match between the Keisho 3 date and the year associated with Himiko's mission to Wei is significant, but that match alone does not identify the occupant or establish how the mirror was transmitted.