Quick answer — Koyoharu Gotouge worked on Demon Slayer: Kimetsu no Yaiba Entertainment District Arc (Original Creator), Demon Slayer: Kimetsu no Yaiba Infinity Castle (Original Creator), Demon Slayer -Kimetsu no Yaiba- The Movie: Mugen Train (Original Creator) and 6 more anime.
Koyoharu Gotouge worked on Demon Slayer: Kimetsu no Yaiba Entertainment District Arc (Original Creator), Demon Slayer: Kimetsu no Yaiba Infinity Castle (Original Creator), Demon Slayer -Kimetsu no Yaiba- The Movie: Mugen Train (Original Creator), Demon Slayer: Kimetsu no Yaiba Mugen Train Arc (Original Creator), Demon Slayer: Kimetsu no Yaiba Swordsmith Village Arc (Original Creator), Demon Slayer: Kimetsu no Yaiba Hashira Training Arc (Original Creator), Junior High and High School!! Kimetsu Academy Story: Valentine Edition (Original Creator), Demon Slayer: Kimetsu no Yaiba Infinity Castle Part 2 (Original Creator) and 1 more.