Butt Detective: Mystery of the Ruins of Tentoumu Details Casts Posters Title Butt Detective: Mystery of the Ruins of Tentoumu Release Date 2020-08-14 Runtime 01 Hours 01 Minutes Genres Animation Adventure Mystery Production Companies Toei Animation Production Countries Japan Yuko Sanpei... Butt Detective (voice)... Ayaka Saito... (voice)... Kazuhiro Yamaji... (voice)... Seiran Kobayashi... (voice)... Inuko Inuyama... (voice)... Original Size (2000x3000) Original Size (898x1280) Original Size (971x1378) Original Size (683x1024)