In recent years, more companies are using crowdsourcing for development of new products, but they often fail due to reasons such as an insufficient number of ideas. Under these circumstances, “Min100,” a crowdsourcing platform for mobiles specializing in hundred-yen uniform products has had a continuous increase in the number of idea submissions, despite a lack of awareness of the platform. In this paper, we review the evolution of the system, development process, and examples of hit products of “Min100” to understand how the platform has evolved based on customer orientation. Then, we discuss three outstanding points of the “Min100” mobile crowdsourcing platform: (1) mobile first, (2) common understanding, and (3) process management.