After Koichi Shimizu proposed a 4 Cs classification in 1973, it was expanded to the 7Cs Compass Model to provide a more complete picture of the nature of marketing in 1979. The 7Cs Compass Model is a framework of co-marketing (commensal marketing or Symbiotic marketing). Also the Co-creative marketing of a company and consumers are contained in the co-marketing. Co-marketing (collaborate marketing) is a marketing practice where two companies cooperate with separate distribution channels, sometimes including profit sharing. It is frequently confused with co-promotion. Also commensal (symbiotic) marketing is a marketing on which both corporation and a corporation, a corporation and a consumer, country and a country, human and nature can live.