Oh wow, I was just made aware of something that Hashino said about Persona 5 last year, before we ever saw PV01 on February 5, 2015. Other sites glossed over it, but I guess I had an inkling at the time that it was important:
It was there all along.Additionally, in the same interview, Hashino mentions how a 2014 game that particularly impressed him was inFamous: Second Son for the PS4, as it had several moral choices between good and bad that engage the player.
Three 2014 entertainment releases other than video games which Hashino enjoyed were Japanese films: Gatchaman, Kikaider Reboot and Lupin the Third.