Masaki Hirooka (廣岡政樹 Hirooka Masaki?) is a Japanese illustrator residing in Saitama Prefecture, Japan. Besides painting, he also enjoys hobbies such as motorcycles and cars racing. Since 2002, he became a free illustrator after leaving the company he was working for.
He is best known for his work on Castlevania: Order of Ecclesia. Hirooka was brought on board after the more traditional anime styling of Castlevania: Dawn of Sorrow and Castlevania: Portrait of Ruin.