In the end, Tadayuki surrendered to the New Government when the New Government Army led by Kinmochi SAIONJI invaded the Sasayama-jo Castle, and furthermore, he attended the meeting when the Imperial Covenant Consisting of Five Articles was announced.
結局は西園寺公望ら新政府軍が侵攻して来ると新政府に降伏し、五箇条の御誓文の席にも参列した。