I spent abt 3 years in Asia* and have been back many times.
That's the funny part. The majority of hard gear that they produced never made it to the US. Some of it, well, the technology wasn't seen here until years later.
The downside was that many G.I.'s bought gear and sometime later needed repair. Fixer guys had never seen it or had access to schems.
I think the PX's were the most major customers for TEAC & Pioneer for a while.
Dad had funny habits for a doctor. He'd frequent pawn shops and being very observant, when nice gear was hauled in for prospective sale and declined, he'd follow the seller outside and make a better offer than the store made. worked often.
MD's ? Minidisks ? Absolutely love them. 80/160/320 minutes per disk (depending on compression) . Portables ? 52 hours playback on a single AA. 100,000 re-writes per disk..OKAY. Quality is great.
BUT, if you bought into L-cassette, mite as well open a museum.
*Japan, Taiwan, Thailand, Hong Kong, China, Philippians, Vietnam....