Electronics firms and other nonautomotive companies are eager to expand their businesses in the auto sector, where innovations are seen as essential amid the growing need for autonomous and electric vehicles.

At the Tokyo Motor Show, open to the public from Friday to Nov. 4, many electronics firms, including Hitachi Ltd., Mitsubishi Electric Corp. and Panasonic Corp., are showcasing their products and services.

Such companies are trying to take advantage of their experience and knowledge to manufacture motors, inverters and sensors that will become indispensable to assemble autonomous and electric cars.