There is also a hypothesis that states Kozosu was influential in making Yamada Hayato no sho, Mitsunari's eldest daughter's husband, the chief retainer of Tadateru MATSUDAIRA, who was Ieyasu and Chaa no Tsubone's child.
また、戦後三成の長女の婿山田隼人正を家康と茶阿局の子である松平忠輝の家老にしたのも孝蔵主の力が大きかったとする説がある。