His vitality is also beyond peak-human level, being able to survive without food or water for 10 whole days when he was embracing his dead wife.
He is a legendary who lived nearly 500 years ago during the the Golden Age of Demon Slayers , as well as the strongest Demon Slayer to have ever existed.
Even when Muzan divided himself into 1,800 flesh pieces to escape, Yoriichi still managed to reduce the number down to 300 in mere seconds.