Although Chen Yu had already told the Kojo family that their dojo's scrolls contained the essence of their swordsmanship, ultimately, Kojo Kanenaga insisted, and Chen Yu kept his promise, giving them parts of the Dark Warrior training methods suitable for the living to practice.
Of course, Chen Yu was not so generous as to share the aspects involving mastery of Necromantic Power or physical enhancement, but in light of Kyoko Kojo's role in the rescue of Kube Rokuro and Misumi Mikoto, he informed them that he held subsequent parts of the method, which they could obtain through helping him gather materials.
Although they only received part of the legacy, for the Kojo family, it was an enormous favor. Especially considering that Chen Yu held further parts, it was definitely great news for Muso Itto-ryu, which had previously reached a dead end.