Kaigaku is available now in Demon Slayer - Kimetsu no Yaiba - The Hinokami Chronicles 2 as part of DLC. Watch the latest Demon Slayer - Kimetsu no Yaiba - The Hinokami Chronicles 2 trailer to see Kaigaku, the Upper Rank demon featured in Demon Slayer: Kimetsu no Yaiba Infinity Castle, in action.
