The Irasutoya Challenge is a creative internet trend focused on the massive library of free illustrations provided by Irasutoya, a site run by Japanese artist Takashi Mifune. Known for its soft, generic, yet strangely comprehensive clip art covering every imaginable situation, the site became a staple of Japanese web design. The 'challenge' involves artists taking these simple illustrations—often depicting odd or overly specific scenarios—and redrawing them in distinct art styles, such as gritty realism or high-octane anime. It celebrates the contrast between the 'cute' original aesthetic and the imaginative reinterpretations by the community, often going viral on platforms like X (Twitter) and Pixiv.