The online MMORPG is currently in development for Nintendo NX, alongside the already confirmed PS4 version. This has me absolutely ecstatic as my friends and I can all play this on the PS4 (although, if I really enjoy this, I might purchase it for the Nintendo NX as well, assuming that I'll be picking up that console and the game makes it over to North America...)
Even if Dragon Quest X is only released in Japan, it may be possible to import a copy as the PS4 is region-free (unlike most of Nintendo's consoles which are region-locked).
Nelva, Giuseppe. "Nintendo NX Version of Dragon Quest X Confirmed in Development Alongside PS4 Version | DualShockers." Nintendo NX Version of Dragon Quest X Confirmed in Development Alongside PS4 Version | DualShockers. N.p., 7 Aug. 2016. Web. 13 Aug. 2016.