Starting his career first as a mangaka's assistant (self-described as "horrible" and "lazy" in said assistant position), and later an H manga artist, he went on to enjoy somewhat limited success with other relatively unknown manga titles such as Angel Dust, Coyote, Gun Mania and Hi-Tension. His first major success came with his manga series Hellsing, which got its start and was subsequently serialized in a monthly manga magazine, Young King OURs, towards the latter half of 1997.