Quick answer — Kouji Etou worked on Demon Slayer: Kimetsu no Yaiba Entertainment District Arc (Art Director), Demon Slayer: Kimetsu no Yaiba Infinity Castle (Art Director), Fate/stay night [Heaven’s Feel] III. spring song (Art Director) and 13 more anime.
![Fate/stay night [Heaven’s Feel] III. spring song](https://gaku.moe/assets/img/anime/fate-stay-night-heaven-s-feel-iii-spring-song.webp)
![Fate/stay night [Heaven's Feel] II. lost butterfly](https://gaku.moe/assets/img/anime/fate-stay-night-heaven-s-feel-ii-lost-butterfly.webp)
![Fate/stay night [Heaven's Feel] I. presage flower](https://gaku.moe/assets/img/anime/fate-stay-night-heaven-s-feel-i-presage-flower.webp)
Kouji Etou worked on Demon Slayer: Kimetsu no Yaiba Entertainment District Arc (Art Director), Demon Slayer: Kimetsu no Yaiba Infinity Castle (Art Director), Fate/stay night [Heaven’s Feel] III. spring song (Art Director), Fate/stay night [Heaven's Feel] II. lost butterfly (Art Director), Fate/Zero Season 2 (Art Director), Demon Slayer: Kimetsu no Yaiba Mugen Train Arc (Art Director), Fate/stay night: Unlimited Blade Works 2nd Season (Art Director), Steins;Gate The Movie – Load Region of Déjà Vu (Art Director) and 8 more.