抄録
This was the first study to analyze changes in Open Innovation (hereinafter “OI”) tactics caused by deteriorating business environment objectively and quantitatively for one enterprise or group of enterprises. In this study, changes in OI tactics caused by deteriorating business environment were revealed with quantitatively analyzing patent applications of Toray group. Firstly, R&D areas was analyzed. In the analysis, the ratio of inventors other than Toray was used. Secondly, R&D focusing activities was analyzed. In the analysis, the ratio of patent applications / R&D investment amount was calculated. The analysis result revealed that production of core technology output was strengthening in Toray's OI tactics after Lehman shock.
