Masaki Hirooka is a Japanese illustrator 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.
- Suikoden Tierkreis (Konami, 2009)
- Castlevania: Order of Ecclesia (Konami, 2008)
- Culdcept Saga (Namco Bandai, 2008)
- Sonic and the Secret Rings (Sega, 2007)