Business Division 4 (第4ビジネス・ディビジョン, Dai Yon Bijinesu Dibijon?) was an internal development division within Square Enix. It was formed in 2013 after an internal restructuring, and initially focused on spin-offs based on the Final Fantasy series and other original titles. In 2019, following another internal restructuring, Business Division 4 was merged with Business Division 1 and Business Division 3 to form Creative Business Unit I.