LOL whatever is going on at SH forums, pretty nutty usually. If they can keep their standards up it won't matter. Yamaha has been producing audio gear there for a long while as have others. Even if it were Vietnam or China does it really matter as long as the brand enforces product quality standards? What, you think made in USA at this point would be "better" at the same price or something?
ps I have a Technics SL1200mk2 purchased in 84 IIRC (maybe 85)
I can compare this to Shimano with their low end production in Taiwan, mid-level in Malaysia, and high end in Japan.
On a pure performance basis, there isn't much difference, esp between Malaysia vs. Japan. The difference gets to be with the materials chosen, the fit and finish, and the prestige.
All of the Shimano stuff from Malaysia has been great! The stuff from Japan likely looks nicer and feels nicer in my hands, but when I'm out riding I don't even give it a second thought.
At the end of the day, it just comes back to quality control, the country or origin is not important. Heck, even if it was "hand assembled in Japan", they are likely importing most of the parts from China.