So much was working against Japanese games that I can almost understand why some devs were under the impression that westerners disliked their games:
-The encroaching narrative that the games press repeated ad nauseum for most of last generation that "Japan is dying", "their games are stale!", "western games are the future!"
-The difficulties of development and resource allocation in the early HD era for those studios not accustomed to using middleware / off the shelf toolkits.
-Americanization of their games in an attempt to cut into the western market (the "Japanese hamburger" paradigm)
-The west out-marketed the hell out of them last gen by ridiculous amounts. Dante's Inferno with their Super Bowl ad, while (the lightyears better game in the same genre) Bayonetta barely got any kind of advertising
-The bulk of major Japanese releases being on the PSP and DS, where handhelds never took off in the west
Over the past few years, stuff has changed for the better, and the devs are finally becoming aware that there's a big, insatiable fanbase for their games outside of their homeland, that likes their games for being unabashedly Japanese. Not to mention, the same games press who were hyping the cinematic, over-produced and over-marketed "AAA" games the west were pushing last gen are now finding those games and franchises a bit more stale. More Japanese devs are adopting middleware tools, porting to various platforms instead of keeping things exclusive, learning to capture grassroots hype via social media, and increasing the amount of games they localize.
I'm just hoping that amazing 2016 lineup is the start of a fantastic second wind, and not one last big boom before fading into mobile oblivion.