The 360 is still carried in 95% of Japanese stores that sell games. It actually has decent-sized sections in most stores as well. I would imagine they would still want a foothold in stores here for the 720.
It has definitely become a niche system here, but the overall software support is excellent (bar MGS Revengeance and some other titles that are exclusive to the PS3 over here). As a mainly 360 gamer in Japan, there are only a few titles that I would have had to import from the US. Other than that I have been able to buy and play most everything no problem. The shmup support is AWESOME and used games are MUCH cheaper on the 360 versus the PS3.







