Yoriichi himself has shown that he can single-handedly kill Muzan in an encounter between the two. The only reason the latter survived is that he split himself into thousands of tiny pieces to escape.

For the others, we summarize the arc below. In the epilogue of the Swordsmith Village Arc, we find out the origin story of Muzan Kibutsuji, the primary antagonist of the anime. Muzan used to be a ...

2, a feature-length re-edited version of the final episode of Demon Slayer: Kimetsu No Yaiba - Swordsmith Village Arc ... the ...