This Kuruwa was separated into the south Kuruwa and the north Kuruwa, surrounded by mud walls, and the remains such as Shuden (main building of residence) with a garden attached, and Tamemasu were dug up from the south Kuruwa area.
またこの曲輪は南曲輪と北曲輪にわけられ、周囲は土塀をめぐらし、南面には庭園をもつ主殿や溜枡等が発掘されている。