After the corridor collapsed due to landslides, part of it was buried in the earth and was therefore preserved, and some pillars, renjimado (windows with vertical or horizontal wooden laths or bamboo) and other things were unearthed in their original form there.
土砂崩れにより倒壊、埋没した回廊の一部がそのまま土中に遺存していたもので、柱、連子窓などがそのままの形で出土した。