Playstation 4 is Hideo Kojima's favourite console!

Source: dualshockers.com

In a ‘Conversation with Creators’ video released by Sony, Kojima said this about the console:
"I think, between the home consoles available in the domestic market, the PS4 is the best. It’s also excellent for graphics, being able to render 1080p at 60fps with room to spare. Since it does it a little better than other hardware, the image quality of the PS4 is the most beautiful. It’s the closest to the photorealistic quality we are aiming at."

Remember that the Xbox One wasn't release in Japan yet and it doesn’t have a release date for that purpose.