A rare "square pair" in the Yura River basin at Tada, Ayabe — showing how chiefs of central Tanba were buried in large square mounds rather than keyhole mounds.
Finds & research
Hijirizuka: mirror, helmet, and cuirass fragments, an iron spear, iron swords (dozens of fragments), iron arrowheads, a comma-bead, glass beads. Both: cylindrical and morning-glory haniwa.
Official status & archaeological view
Official status
National Historic Site (1992; both mounds).
Archaeological view
Two square mounds with projections about 120m apart. Hijirizuka is about 54m per side (59m including its projection) and 7m high; Ayamezuka is about 32m per side. Both are two-tiered, moated, and date to the early 5th century.
Field notes
Compare the two across their moats; combine with Kisaichi-Maruyama↗ on an Ayabe circuit.