Even during his fight with muzan, he came close to injuring the infamous demon. Webafter turning red, the sword is capable of burning the demons in conjunction with yoriichi’s sun breathing and also restricts their healing abilities. Its exceptional artistry strikes a flawless balance. I have a question, why does yoriichi's katana lack a tsuka wrapping and only what seemingly has the ray skin wrapping? Has there been a katana. It's an exact, functional replica of yoriichi's sun blade,. Webthe katana of yoriichi tsugikuni is a masterpiece of medieval japanese swordsmithing.