おしりかじり虫 (2015)

"Oshiri Kajiri Mushi" (おしりかじり虫), which translates to "Butt-Biting Bug", is a Japanese song that debuted on the NHK children's music program "Minna no Uta" in 2007. It serves as both the title of the song, the artist moniker, and the name of the character featured in it. The song was created by the artist duo Uruma Delvi, who were responsible for the original concept, direction, lyrics, composition, and animation. The song's co-composer and arranger was Kimitaka Matsumae. Vocals were done with a voice changer and performed by Uruma Delvi, Matsumae, and two others. Choreography was by Nagare Minami. The song portrays a magical bug called "Oshiri Kajiri Mushi," who invigorates people by biting their bottoms. Unbeknownst to it, the people it bites feel revitalized. The song became popular for its catchy melody and use of slang such as "chou ii kanji." The version aired on "Minna no Uta" is 2 minutes and 20 seconds long, with a 3 minutes and 30 second director's cut version also available. An anime television series titled "Anime Oshiri Kajiri Mushi," featuring the bug as the main character, premiered on NHK BS Premium in October 2012. The protagonist, Oshiri Kajiri Mushi XVIII, is voiced by Tomoko Kaneda. There are also derivative works like picture books and games.