is a Japanese graphic artist who works predominantly in anime and manga. He received his Master of Fine Arts from the Tokyo National University of Fine Arts and Music. His works have an edgy style due to, among other things, his not using a ruler while drawing as is usual for most anime-style art. He first gained fame in his work on the avant-garde anime Serial Experiments Lain. He is also responsible for the concept and character design for the series NieA under 7. He is the creator of the doujinshi Haibane Renmei, which was then adapted into an anime.