Abstract
Japan Society for Intellectual Production and Tokyo Medical and Dental University jointly held a symposium titled "Open Innovation --Challenges to change corporate cultures--" on December 1st, 2015. "Open Innovation" has been widely known in industry, academia and government, recently. On the other hands, some problems have been risen up to the surface as the results of trials to open innovation. Based on this, the symposium was comprised of 1) introduction of pioneering examples of strategic approach to open innovation by large enterprises, 2) introduction of problems concerning open innovation, and 3) discussion about differences of approach to open innovation among the categories of business.