Kansei design methods are successful in the Japanese industry and academic worlds. Outside Japan, their level of development and recognition is nothing compared with the situation inside of Japan. One of the reasons is that there is currently no comprehensive description of Kansei and Kansei studies written for the international community. This paper intends to provide such description, to analyze involved cultural differences, and to describe how Kansei is involved in the Japanese design approaches. To do so, an overview of main descriptions of Kansei is realized and synthesized into a comprehensive and useful description. Thereafter, Kansei study objectives and methods are analyzed and their differences with that of western approach. Finally, the implication of Kansei in Japanese design is explained. This research intends to improve western understanding of Kansei, and to improve mutual understanding in both industrial and academic worlds between East and West.