People can argue about what games they prefer but objectively speaking western developers have ran circles around japanese developers in terms of number of quality games made this gen. A western game has won the majority of GOTY awards every single year this generation. Looking at metacritic scores, there are 10 western games with 90+ scores for every Japanese one.
There are plenty of Japanese games I've enjoyed this gen. Heck Dark Souls and The World Ends With You are probably in my top 10 favorite games of all time. But when you compare the amount of quality western games to japanese games there is just no contest. I see people listing 10-20 good Japanese games to try to prove there are plenty. I could easily list 200 Western games from this gen that are considered good by the majority of people who've played them and have sold well. Heck even by just grouping franchises into one name I could list 60 ips that have at least 1 game with an 80+ meta that has sold over a million copies. And this is just off the top of my head from ips that I've personally played or looked into. There are probably 60 more.
Halo, Borderlands, Grand Theft Auto, Assassin's Creed, Battlefield, God of War, Uncharted, Bioshock, Dead Space, Mass Effect, Batman, Left 4 Dead, Portal, LittleBigPlanet, XCom, Civilization, Fable, The Walking Dead, Killzone, Resistance, Metroid Prime, Donkey Kong, Need for Speed, EA/2k Sports games, Warcraft, Starcraft, Diablo, Dragon Age, Elder Scrolls, Fallout, Forza, Ratched and Clank, Saint's Row, Just Cause, Sleeping Dogs, Dues Ex, Tomb Raider, Dishonored, Lego, Motorstorm, Dirt, Far Cry, Burnout, Walking Dead, Guild Wars, Rock Band, Guitar Hero, Infamous, Heavy Rain, Alan Wake, Crackdown, Splinter Cell, Max Payne, LA Noire, Rage, Crysis, Rayman, Darksiders, Total War, Viva Pinata, Last of Us
Not to mention hundreds of amazing indie games for every gaming taste imaginable, mostly western developed.
Now obviously most people won't enjoy every single one of these IPs. But the same could be said with the far smaller lists of Japanese developed ips this gen. The point is there have been a staggering amount of western developed IPs this gen that many people have enjoyed. Japanese developers are still making plenty of good games. It is just that western developers have jumped way ahead in the number of games.