In 1575, after the Battle of Nagashino, Yoshimasa KISO (who was married to Marihime, Shingen TAKEDA's daughter), a maternal relative of the Takeda clan, was ordered by Katsuyori TAKEDA to support Nobumoto AKIYAMA in defending Iwamura-jo Castle in Mino Province.
天正3年（1575年）、長篠の戦いの後、武田氏の外戚である木曾義昌（武田信玄の娘・真理姫の夫）は武田勝頼より秋山信友が守る美濃国岩村城の支援を命じられた。