A recent tweet from Koei Tecmo Europe let their European fans know that the next Nioh demo is inbound. There was no mention of the demo being released on the US PlayStation Store so, for now, this seems to be only available on the European PlayStation Store.
— KOEI TECMO EUROPE (@koeitecmoeurope) August 22, 2016
Nioh was shown at E3 2016. We learned from the trailer was that the game will take place in feudal Japan. The fighting styles seem to have taken cues from the Souls games. By giving the player a variety of weapons including bows, katanas, spears, rifles, players have the ability to approach combat in different ways. There is still very little we know regarding the story surrounding Nioh, so we will have to wait to learn more.
The game is slated to come out in 2016. Be sure to check back with Mammoth Gamers for more details in the coming months.