I'm not sure I entirely agree with it. The Japanese centric games and Eastern developed games are still there.
Fist of the north star
King of Fighters
Tons of anime games
Dragon quest games
Gal Gun games
Akibas beat games
Earth defense force
There is plenty out there, its just that most of the Japanese games are considered niche and don't have the big marketing budgets.
Look how long it has taken for the west to acknowledge the Yakuza games and although Resident Evil 7 was by far the best RE game since 4, but it didn't perform as well as RE5 which was more western.
We've even had Tetris remade, Monster Boy, streets of Rage coming soon, Nier Automata was one of the best games this gen and then we also had Bloodborne and Nioh.
I think considering how big the sales are outside of Japan compared to in Japan, I think the PS4 is doing pretty well in providing games made in Japan, Japan centric games and niche games.
Whoever said life to be like a box of chocolates clearly didn't know what he was talking about.
Life is more like a game of bumper cars. At every turn there is a possibility you will get screwed.