As a certain Yamada's aunt was Ieyasu's concubine Cha'a-no-Tsubone, he served Tadateru MATSUDAIRA, taking his wife (Mitsunari's daughter) after the ruination of the Ishida Family.
山田某の叔母は家康の側室茶阿局でその縁から石田家没落後は妻（三成の娘）を連れ松平忠輝に仕えた。