| Location | Nara Pref. |
|---|---|
| Shape | Square mound |
| Mound length | 50 m |
| Period | Late 6th–early 7th c. |
Trapezoidal square mound in Kurahashi, Sakurai City. A leading candidate for the tomb of Emperor Sushun, assassinated by Soga no Umako — one of the most dramatic episodes in early Japanese history.
Surveys by Sakurai City Board of Education and the Kashihara Archaeological Research Institute (national historic site). Burial facility: double-aisle horizontal stone chamber (>18m total length) containing a large house-shaped tuff stone coffin — a representative 7th-century terminal-period coffin. While definitive occupant identification is impossible, the chamber scale, coffin, and date are consistent with imperial-class burial of Emperor Sushun (died 592 CE). Sakurai City Board of Education continues conservation and investigation.
Emperor Sushun was assassinated by Soga no Umako in 592 CE. The IHA-designated mausoleum lies about 1.7km to the southwest of this mound.