Keyhole mound 130m in Nakayama-cho, Tenri City. A constituent mound of the national historic site Yamato Kofun Group. As one of the earliest keyhole mounds (late 3rd–early 4th century), it is of the highest archaeological importance. Rich assemblage including triangular-rimmed deity-and-beast mirrors. Located along the "Yamanobe-no-Michi" ancient road; combined visits with Hashihaka Kofun and Andonyama Kofun (Emperor Sujin Mausoleum) are strongly recommended.
Finds & research
Triangular-rimmed deity-and-beast mirrors, painted mirrors, iron swords, iron axes, iron arrowheads, beads. Vertical-shaft stone chamber, clay burial pit, and wooden coffin confirmed.
Two views on the occupant
Archaeological view
Keyhole mound 130m; rear circle 72m diameter, front section 60m wide. Dated late 3rd–early 4th century; among the earliest keyhole mounds, with front section still approaching a bachi (plectrum) shape. Vertical-shaft stone chamber, clay-lined pit, and wooden coffin confirmed. Finds: triangular-rimmed deity-and-beast mirrors, painted mirrors, iron swords, iron axes, iron arrowheads, beads. One of the most important early keyhole mounds in the Yamato group, documenting the formative Yamato state. Occupant unknown; likely one of the earliest Yamato sovereigns or paramount chieftains.
Imperial Household Agency view
Not managed by the IHA. Designated in 1972 as a constituent mound of the National Historic Site "Yamato Kofun Group." Managed by the Tenri City Board of Education and Nara Prefecture. Multiple excavations conducted owing to its high archaeological significance.
Field notes
The Yamato Kofun group is among Japan's most important complexes for understanding the formation of the Yamato state. The ancient "Yamanobe-no-Michi" road passes nearby; Emperor Keiko's mausoleum (Shibuyamukaiyama, 300m) and Emperor Sujin's mausoleum (Andonyama, 242m) are within walking distance. JR Sakurai Line "Yanamoto" Station, ~15 min. walk.