Oji Hiroi (広井 王子 Hiroi Ōji?, born 8 February 1954), 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.