Not really shocking considering how Japan likes conglomerates.
Hyundai makes cars and military weapons and probably thousands of other things that aren’t even related to each other, don’t know if they still make computers.
To nitpick: Hyundai are Korean but the Korean Chaebols are in many ways even more dominant than Japanese Keiretsu (fmr. Zaibatsu) are. Mitsubishi would be a good Japanese example.