An early keyhole mound on a ridge at Yoshima, Shingu-cho, Tatsuno. Chinese mirrors recorded from its pit-style chamber provide important evidence for the early tombs in Harima.
Finds & research
Pit-style chamber (5.3m per the Agency) and six bronze mirrors. A triangular-rimmed deity-and-beast mirror fragment is separately cataloged by the Tokyo National Museum. The city also lists glass beads, iron sword fragments, and pottery.
Official status & archaeological view
Official status
National Historic Site (1978).
Archaeological view
Tatsuno City gives this keyhole mound on a hill ridge a length of about 30m; the national designation text gives 36m. The city dates it to the mid-3rd century. The Agency describes a 5.3m pit-style chamber in the rear mound and enumerates six Chinese-made bronze mirrors. Tatsuno counts a triangular-rimmed deity-and-beast mirror among the six, whereas the Agency’s list does not use that term; it names two four-deity, four-beast mirrors with a Heavenly King, Sun and Moon arabesque band, cast from the same mold as mirrors from Yamashiro Otsukayama. Cultural Heritage Online also lists a triangular-rimmed deity-and-beast mirror fragment from this mound held by the Tokyo National Museum.
Field notes
On a hill ridge; check local route and access signs before visiting.