おしりたんてい

Butt Detective (Oshiri Tantei) is a Japanese children's picture book series created by Troll, which has been adapted into an anime series. The main character is a detective with a face that resembles a butt, who uses his sharp observation skills and reasoning to solve various mysteries. The series first appeared as an iPad app in 2011, followed by the publication of picture books by Poplar Publishing in 2012. In 2015, the 'Butt Detective Files' series for lower grade elementary school students was added. The series is very popular for its unique character design and engaging puzzles. The anime series premiered on NHK E-Television in May 2018, and new seasons continue to be released. In addition to the TV anime, the series also includes animated feature films, web animations, games, musicals, and various merchandise. The original author 'Troll' is a creative unit consisting of Yoko Tanaka and Masahide Fukasawa. As of December 2020, the series has sold over 9 million copies. In the story, Butt Detective solves cases with his assistant Brown, and his signature catchphrases are 'Hmm, I smell something' and his 'Pupu' finishing move.