A National Historic Site noted for nearly forty bronze mirrors, including more than thirty triangular-rimmed deity-and-beast mirrors. Its relationship to Yamatai remains scholarly debate, and the occupant is unknown.
Finds & research
The pit chamber yielded nearly forty bronze mirrors, including more than thirty triangular-rimmed deity-and-beast mirrors, together with numerous weapons, armor fittings, and tools.
Two views on the occupant
Archaeological view
An approximately 175m keyhole mound at Tsubai, Yamashiro-cho, Kizugawa. It belongs to the earliest phase of the Early Kofun period in the late 3rd century. Its pit chamber was discovered during railway cutting work in 1953.
Imperial Household Agency view
This is not an IHA mausoleum. It was designated a National Historic Site in 2000, and its National Important Cultural Property assemblage is held by Kyoto University and other institutions.
Field notes
The mound includes public and private land and adjoins housing and a railway. Follow Kizugawa City guidance for accessible areas.