Yamaha, Korg an Roland were the defining instrument producers of the 80s and 90s. Few things have altered the course of popular music as much as the TR-909 and TR-808, M1, DX-7, Juno, Jupiter. All of electronic music grew out of those.
The Walkman and Discman were iconic.
Honda was building P3 and ASIMO. The PlayStation 1/2 and Nintendo 64/GameCube were a thing.
I didn't even get into anime, the language or music from there until decades later. But all of the cool things came from Japan back then. Honestly, they still kind of do.