It is said that this custom originated from a historical event when Yoshimitsu ASHIKAGA gave his Kamon (Zo-mon (贈紋)) to Yoriyuki HOSOKAWA during the Muromachi Period.
その習慣は室町時代まで遡り、足利義満が細川頼之に自身の家紋を贈紋したことから始まったと言われる。