Re: New Alto Saxaphone
I believe that all of the pro lines of Yamaha are still assembled in Japan, although I think that individual parts of said horns may be sub contracted out to other factories in Asia at this point.
Although some Yamaha enthusiasts claim to recognize differences in the non Japanese Yamaha horns vs. those same models formally made in Japan proper, they are still regarded as some of the best, new production student horns available.
Provided you select a good one (quality, even among the otherwise tight quality control of Yamaha, varied from one horn to another), you should have a good horn to develop your chops on.
Of course, depending on finances, you should always go for the best horn you can afford. If you have the dosh to buy a pro level horn, and have a clue what model would suit you best, go for it.