And why doesn't Japan manufacture bikes? Or Germany? I have been asked this a few times, to which I answer; It would cost double or triple the price.
Why? Because you are paying for competent skilled craftsman who know exactly what their doing.
I have a 1990 Schwinn KOM S9 MTB, top-o-line for its day and it was made entirely in Japan and it shows.
You do get what you pay for.