A rare "square pair" on the Yura floodplain at Tada, Ayabe — the distinct funerary choice of Tanba lords who built no keyhole mounds.
Finds & research
Hijirizuka: mirror, helmet, and cuirass fragments, iron, beads. Both: cylindrical and morning-glory haniwa.
Two views on the occupant
Archaeological view
Two square mounds with projections standing 120m apart: Hijirizuka, ~54m per side and 7m high — among Japan's largest square mounds — and Ayamezuka, ~32m. Both two-tiered and moated, built in the early 5th century, yielding mirror, helmet, and cuirass fragments, beads, and haniwa.
Imperial Household Agency view
Not designated by the IHA. National Historic Site (1992; both mounds).
Field notes
Compare the two across their moats; combine with Kisaichi-Maruyama (id:685) on an Ayabe circuit.