カーエレクトロニクス部品の国内需要に関する試算

―産業連関表におけるデバイス製品からの推計―

抄録

Today’s automobiles are becoming more electrified and electronic, with increasingly complicated parts. However, from official statistics, it is impossible to measure how many parts from the electrical and electronic industries are installed in the finished vehicle. Although the items listed in official statistics have been reviewed for some automobile parts, arguably, they have not been sufficiently accompanied by the progress of electronics in motor vehicles. However, now that the automobile industry is entering the new era of CASE - connected, autonomous, shared, and electrified - it is expected to incorporate many more items from the electrical and electronic industries and multiple other industries, which can now form new markets for automobiles.

This study uses the official Input-Output table（ 2011, 2015） to estimate the amount of inputs in finished vehicles from the electrical and electronic industries. We extracted devices that are considered car electronics products in a narrow sense, confirmed the routes and patterns in which they are assembled into the finished vehicle, and confirmed the total number of such parts in use.

However, this paper also emphasizes that there are limits to the estimation using the Input-Output table. For example, as the Input-Output table is prepared every five years, it hinders the accurate measurement of the dynamic expansion trends of the electronics automobile parts segment and the deepening interdependence between the automobile and the electrical and electronic industries. The official statistics also need to be reviewed.