After the recent failure of FFXIV and the intense hate the japanese community has for the game and the fact FFXI is not keeping their interest as strongly anymore, there has been a huge migration to the Blackrock Server Horde side, though many are holding off till Cataclysm to play(for obvious reasons)
And they are loving the game. And they seem to really like the idea of Cataclysm as a whole, many of them ready to shell out money for the expansion.
I have been spending a fair amount of time on their forums explaining to them how each class works and answering questions(they want me to explain everything in a FFXI analogy *sigh*), they have even made several patches that put a large portion of the quest text and normal command lines in japanese.
With this growing interest in the game, do you believe Blizzard will consider developing a japanese version of the game?