| Location | Nara Pref. |
|---|---|
| Shape | Keyhole-shaped mound |
| Mound length | 103 m |
| Period | Late 3rd–Early 4th c. |
A ~103m keyhole mound in Tenri City — Nara Prefectural Historic Site. Late 3rd–early 4th century. Famous for its remarkable assemblage of 26+ bronze mirrors (including 23 triangular-rim type) — among the most mirror-rich kofun in Japan. Located in the same Yanagimoto area as Emperor Sujin's and Emperor Keiko's mausolea, marking it as an important early Yamato royal center.
The vertical pit stone chamber (split-bamboo wooden coffin) yielded 23 triangular-rimmed 神獣 mirrors, 3 inner-flower-pattern mirrors, and over 26 bronze mirrors in total — among the largest mirror assemblages ever recovered from a Japanese kofun. Tenri University's Tenri Sankokan Museum holds the excavated mirrors, with some on permanent display. Iron swords and beads were also found.
About 10 min walk from JR Sakurai Line "Yanagimoto" Station, and about 5 min from Andonzan Kofun (Emperor Sujin Mausoleum, id:203). Recommended combined with Shibuya Mukoyama (id:204) and Uenoyama (id:421) on a Yanagimoto kofun cluster tour. The Tenri City Kurozuka Kofun Exhibition Hall (at nearby Kurozuka, id:205) also provides context for this region's kofun culture.