Additionally, in 1582, during the campaign to capture Takamatsu-jo Castle in Bitchu, which the military commander for the Mori clan, Muneharu SHIMIZU, was in charge of, Hideyoshi had colossal dikes built to flood the castle and it is said that it was again Yoshitaka who suggested this strategy to Hideyoshi.
また天正10年（1582年）、毛利氏の部将・清水宗治が守る備中高松城攻略に際し秀吉は巨大な堤防を築いて水攻めにしたが、この作戦を献策したのも孝高だったと言われる。