http://www.novacrystallis.com/2016/1...udgement-disc/

During today’s Active Time Report, a new demo was announced for Japan players titled Final Fantasy XV: Judgement Disc available on November 11th.With Final Fantasy XV releasing in only a few weeks, this demo seems to serve as a way to “judge” the final product. The demo’s contents span from the beginning to half way through Chapter 1 of the game. Expected total playtime for this new demo will be around an hour and a half. While you won’t be able to carry your save from this demo over into the final game, players who complete the demo will be rewarded with a “special” video.

If you make a Japanese PSN account, you'll be able to download and play it. Not in English though, of course.