However, in 1984, a pit of a pillar embedded directly in the ground was found in the Wakimoto ruins located at Wakimoto, Sakurai City, and it was supposed to date back to the late 5th century.
しかし1984年、同市脇本にある脇本遺跡から、5世紀後半のものと推定される掘立柱穴が発見された。