Born in Engaru, Hokkaidō, Yasuhiko dropped out of Hirosaki University and was hired by Osamu Tezuka"s Mushi Productions in 1970 as an animator. He later went freelance and worked on various animation productions for film and television He began working as a manga artist in 1979.
He is also known as a novelist and science fiction illustrator.
Some of his most notable works as character designer and director are Brave Reideen, Combattler V, and Mobile Suit Gundam. Less well known is the fact that he was the original character designer for the Dirty Pair, long before their first anime or manga appearance, when he was illustrating the Haruka Takachiho short stories that became the 1980 fixup novel Great Adventures of the Dirty Pair.
He"s also worked on the character designs for the video game, Vay. Yasuhiko signs his artwork as "YAS".