Fact: Japan has a disproportionate number of developer to userbase ratio.
Fact: Japan is home to half of the world's most influential developers.
Fact: No console has ever won a console war without winning Japan.
Opinion: Even with the meme that Japan's infleunce is diminishing and Western Developer's clout growing, that's still not enough to just discount Japan completely. In a generation or two, maybe. Not this one, though.As it stands right now, anyone who seriously believe that losing Japan is not that big of a deal is deluding themselves and frankly, just FUD fodder.