Ghibli Experimental Theater On Your Mark (ジブリ実験劇場 On Your Mark, Jiburi Jikkengekijō On Yua Māku) is an animated music video created by Studio Ghibli for the song "On Your Mark" by the Japanese rock duo Chage & Aska. The song was released in 1994 as part of the single "Heart". In 1995, Hayao Miyazaki wrote and directed the short film for the song as a side-project after having writer's block with Princess Mononoke. The anime music video is non-linear, providing multiple reiterations and alternate scenes to depict the events. The music video added sound effects to the audio track, but contains no dialogue. Miyazaki purposely misinterpreted the lyrics to present his vision of a world where the surface becomes inhospitable and humans live in an underground city. He made the video cryptic to ev