Gibson does make guitars in Japan, or did, anyway, but those are electrics intended for the Japanese market and labeled as Orville guitars. So far as Im aware none of the Japanese-made guitars have carried a Gibson logo. Gibson makes special runs especially for the Japanese market all the time.

Where was the original Gibson guitar factory?

Kalamazoo The Old Gibson Guitar Factory – Kalamazoo, Michigan - Atlas Obscura.

Who sells more guitars Gibson or Fender?

If talking about just fender or gibson (not any of their subsidiaries), fender definitely sells more guitars, most because Gibson itself doesnt have anything in the price range of a mexican strat that can sell well.