Crayon Shin-chan began as a manga by Yoshito Usui in 1990 and became a long running anime in 1992, following mischievous five year old Shinnosuke Nohara and his family in Kasukabe. His exaggerated vocal reactions became a staple of the show's comedy, and short clips like this uooo circulated online as fans built anime soundboards alongside other vocal staples such as anime ahh and Tuturu. The clip stays popular because it captures Shin Chan's cheeky personality in a single second, making it reusable far beyond the original episodes.