Webkokushibo is one of the most dangerous demons, second only to muzan kibutsuji. He wields a katana made out of his flesh and blood, utilizing his mastery of swordsmanship. Webkokushibo is present in a flashback of kaigaku, depicting the time just before kaigaku following his defeat at the hands of kokushibo. Kokushibo then offers his own blood. Webkokushibo was a human during the sengoku era, and was the older brother of yoriichi tsugikuni. As a human, he was a powerful swordsman and respected. Webone character that stands out is kokushibo, a formidable demon and former hashira. His sword, a focal point of his character, is as intriguing as the man. The history of kokushibo from demon slayer: Kimetsu no yaiba, the tale of a moon that could not become the sun. Webkokushibo is the only demon who is capable of using breathing abilities, and his blood demon arts provide extra skills and powers, which is why he still maintains. Webusing kokushibo's max age of 484 (24 years old inching on 25 to avoid death + 60+400), what i found is the best way for the timeline to make sense is if kokushibo was born in.
