This is probably SONY's though process:
-Spend money partnering with Activision on Destiny or release niche Japanese games
-Spend money on The Order 1866 or release niche Japanese games
The PS3 sold 10million lifetime sales in Japan. The PS4 will be lucky to hit that even if SONY gave a big push with games.
Meanwhile the PS4 will have a chance to sell 100million Worldwide.
So should they be spending money on the 90million or the 10 million. Its easy to see why they don't care about Japan.
They released japanese games for the PS3 and it got them nowhere and lost them ground in the West where MS was grabbing third party partnerships (Mass effect, Bioshock, GOW).
This gen we have already seen Sony work with Ubisoft for Watchdogs and Bungie for Destiny and seen the huge dividends with sales for Watch Dogs being 2:1 in sales for the PS4 vs X1. Also, Arkham Knight too. These games are system sellers to 360/PS3 owners in the West looking to upgrade and with the limited money SONY has its best spent in the West.
Sony lost billions last gen and are clearly focusing on profitability. They've already stopped supporting the Vita with big budget games and now Japanese centric games.
The PSP was saved in Japan thanks to Monster Hunter and I'm guessing they're hoping for the same with KH3, FF15 and other third party publishers for the PS4.