His younger sister (or his daughter?) became Yoriuji ASHIKAGA's Ie no Nyobo (lady-in-waiting), and after that, through inter-marriage, the Uesugi clan became very influential in the Ashikaga family.
重房の妹（娘？）が足利頼氏の家女房となり、以後、上杉氏は姻戚関係を通じて足利家中で権勢を得るようになった。