Oshiri Kajiri Mushi (おしりかじり虫?) is a children's song in Japan that broke into the top 10 singles charts. The music video and song were created by the husband and wife duo Uruma Delvi.

The song first appeared in 2007 on "Minna no Uta," a Japanese TV program that targets children and is broadcast on Nippon Hōsō Kyōkai. "Oshiri Kajiri Mushi" means "[a] butt-biting insect" in Japanese, and the songwriters describe the protagonist as a magical bug that encourages people to interact with each other by biting their bottoms.