Earlier, he had looked after Senmatsumaru SOGO, the legitimate son of Masayasu SOGO, who had been the former lord of Sanuki and killed in the battle of Hetsugigawa, but he is said to have ordered his nephew Uneme OTSUKA to kill Senmatsumaru with poison in order to plow with 20 thousand koku crop yields which was the property inheritance left to Senmatsumaru.
これに先立ち、讃岐の前国主であり戸次川の戦いで討ち死にした十河存保の嫡男十河千松丸を預かっていたが、その遺領二万石を横領するため甥の大塚采女に命じて毒殺させたと伝わる。