Not all Japanese gear, no, but when it comes to amplifiers most is definitely worth a look.
I currently have fifteen Japanese vintage amplifiers/receivers from Marantz, Pioneer, JVC, Mitsubishi, Trio and Technics. That plus a couple of dozen more over the past decade.
I haven't found anything poor and I think the reason is simple.
These products emerge from a period where a good solid spec was mandatory for all but a bargain basement product. They all aspired to do the same job.
What you see in comparison with the UK market and some grown products is far greater variability, because the goal of starting from a good spec was in many cases tossed into the weeds. Therefore our home grown products, at all price points, tended to range form superb to appalling.
You have to look pretty hard to find electronics from Japan which are classed as 'tat' IME.
Turntables are a different matter - huge piles of tat with a select few good examples.
The reasons are clear to see - the use of lightweight resonant structures on the lower end kit.
I think that this ‘JVC thread’ has been a wake-up call for quite a few people. I can’t help feeling that the British - more than any other group of hi-fi enthusiasts - really missed a trick in not giving the Japanese kit the recognition it deserves. Despite being hugely pleased with the JVC (effectively a new amp - I really can’t see me ever selling it) the thought that the best Japanese stuff never even made it here is an enticing one. I still have a Sansui 907 alpha MRX itch that I think I’ll want to scratch at some point. Sansui tried really hard on that one.
I started my audio-nut life being weened on Japanese kit. In the late 70s and early 80s there was far less bias against such kit, but that rapidly changed and like many I went with the flow, driven by the press attitudes manly.
More recently it's been rather like going full circle and rediscovering the joys of the early days.