The researchers could not find out the purpose of the ancient structural remnants; however, recently it is considered, although there is no definite evidence in both cases, that the remains, as well as the similar remains discovered at the same time in Yamazaki Remains in Awano-cho town (Yusui-cho town), Kagoshima Prefecture, were used for transport of Koryo timbers in the past.
当初は利用目的がわからなかったが、同時期に鹿児島県栗野町（湧水町）の山崎遺跡でも同様の遺構が見つかっており、いずれも確証はないが虹梁材の運搬に用いられたものと考えられている。