is a Japanese manga artist from Ishikawa Prefecture, Japan. He is notable for the creation of the four-panel comic strip manga Dà Âjin Work which is the first of his works to be adapted into an anime television series. He also created the four-panel manga series The Comic Artist and His Assistants, which was serialized from 2008 to 2012, with a sequel serialized from August 2013, and adapted into an anime television series which aired in 2014. Hiroyuki has also created dà Âjinshi based on the Type-Moon visual novels Tsukihime and Fate/stay night. His older sister, , is also a manga artist.