Oji Hiroi (広井 王子, Hiroi Ōji), real name Teruhisa Hiroi (廣井 照久, Hiroi Teruhisa), is an author and video game developer. He co-authored Samurai Crusader with Ryoichi Ikegami. He also created the Far East of Eden and Sakura Wars role-playing video game franchises, and wrote the Sakura Wars manga.