Chage and Aska
began work on the initial storyboards for "Princess Mononoke" in August 1994, based on preliminary thoughts and sketches from the late 1970s. While experiencing writer's block during production, accepted a request for the creation of "On Your Mark", a music video for the song of the same name by Chage and Aska. In the production of the video, experimented with computer animation to supplement traditional animation, a technique he would soon revisit for "Princess" . "On Your Mark" premiered as a short before "Whisper of the Heart". Despite the video's popularity, said that it was not given "100 percent" focus.