Koji Kabuto (兜甲児, Kabuto Kōji?), also written Kouji Kabuto, is a fictional character featuring in the works of manga artist Go Nagai. He is the main character and pilot of super robot Mazinger Z. He makes a comeback in the sequel series Great Mazinger where he helps defeating the Mycenaean Empire. He also features in Grendizer as Duke Fleed's friend and sidekick.
His voice actor is Hiroya Ishimaru in the Japanese version of Mazinger Z and Mazinkaiser. In the English version of Mazinkaiser, his voice actor is Robert Newell. In the gaming industry, Kabuto is considered one of the stalwarts of the Japanese-exclusive strategy game series Super Robot Wars and appears in nearly every incarnation. In Shin Mazinger Shougeki! Z Hen, his voice is played by Kenji Akabane