While his older paternal half-brother, Yoshishige reclaimed the land of Nitta sho (Nitta manor) in Kozuke Province with his father and became the founder of the Nitta clan, Yoshiyasu's descendants who were based in the Ashikaga manor inherited from his father were developed as the Ashikaga clan in the future generations.
異母兄の義重は父とともに上野国新田庄を開墾し新田氏の開祖になったが、これに対して父から相続した足利庄に拠った義康の子孫は後世足利氏として発展していった。