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In the conceptual design phase, generating novel concepts is a cornerstone for producing innovative products. This paper proposes a framework for design concept generation with an extensional conceptual space (ECS). A conceptual space is a geometric space of concepts constructed with concept distance. ECS focuses on the characteristics, i.e., function and physical attribute, each of which is a set of entities that fall under its definition. The concept distant measurement method based ondoi:10.1299/transjsme.22-00191 fatcat:lwhlkyes4vfidja2x4oswe7ev4