Homogenization of Japanese Industrial Technology From the Perspective of R&D Expenses
The aim of this paper is to discuss the reasons for the decline in the profitability of Japanese R&D from the perspective of in-house R&D efforts. Focusing on changes in the allocation ratio of in-house R&D expenses by industry from 1972 to 2017, technological structure changes in the Japanese industry during that period are empirically analyzed. Based on the analysis, the technological structure of the Japanese industry has been consistently moving toward homogenization since 1972. Homogenization is mainly directed toward the related technical fields of automobiles and information and communication machinery/equipment/electronic parts, which are the main industries that currently lead the Japanese economy. While the types of technical knowledge possessed by the Japanese industry are decreasing, there is a lack of R&D activities that will create new products and markets and increase the pie of the Japanese industry or greatly promote the metabolism of technology of the entire industry.