This paper identifies factors that contribute to the choice of media used for interorganizational communication. We develop the framework that media choice between finns is determined by the fit between characteristics of the media and (1) the attributes of information flows and (2) the quantities and composition of the firms' assets. Based on this framework, we conducted an exploratory research on the choice of media that firms use to place orders in dry grocery distribution in Japan. We found five factors in media choice: (1) the design of physical distribution, (2) the share of transactions of a business partner, (3) the firm's solvency for media costs, (4) the installed base of facilities, and (5) mutual complementarity among media.