Rafux on 14 August 2013
Is not just that Japan prefers its own products but also Sony and Nintendo consoles are always good choice, if for example the X360 was competing with something like the Virtual Boy I bet Japan would prefer the X360.
Windows is the most popular OS in Japan and what options do they have? Apple computers are expensive in comparison with a PC (which you can built how you want) and most programs doesn't have a Linux version so they choose Windows which is a solid OS nowadays.
TLDR: Geographical bias but also strong competition.
