In 1356, he left his position as a member of the Imperial family and became a subject named 'MINAMOTO no Yoshinari (Yoshinari YOTSUTSUJI),' however, he also called himself Yotsutsujinomiya even after that ("Gogumaiki").
延文元年（1356年）に臣籍降下し「源善成（四辻善成）」を名乗るが、以後も「四辻宮」をなのっていたという（『後愚昧記』）。