This bronze lid was excavated from the pit dwelling around Musashi Kokubunji Temple, which suggests to have been a blacksmith’s workshop. This pit dwelling seems to have been burned down; the bronze lid is generally bent and partly melted by heat too.

In processing of the preservation, a pattern by line engraving was revealed on the exterior surface of the lid. The bead pattern and four-petals pattern were carved inside the crown, and the arabesque design, beast design and stippling were done outside of the crown. This lid is supposed to be for a bronze bowl or a nest of bowls.

This design is in common with that of Sahari-no-futa No.2 owned by Shoso-in Treasure Repository, and it is indicated that the lid may have been made in the Korean peninsula. However, it is unclear how it was brought here.