Both Masanari and his father-in-law served Hideyoshi TOYOTOMI, and due to an order from Hideyoshi, Masanari became an aide (chief retainer, fifty thousand koku) to Hideaki KOBAYAKAWA, who became Kobayakawa clan, and supported Hideaki.
正成は義父とともに豊臣秀吉に仕えたが、秀吉の命を受けて小早川氏に入った小早川秀秋の家臣（家老・5万石）となり、秀秋を補佐した。