Even with the Wii U failing globally, 3DS and onward have proven Nintendo grips Japan with an iron fist. PS4 sold about 0.9 million less in Japan than the PS3, meaning it couldn't crack 10 million.
It has so much to do with the Japanese market enjoying handhelds more that PlayStation Vita is by far the worst selling PlayStation console in Japan, PSV software sales were especially low.
PSP and PS3 were 'alright' at the time because the software development was still split per specific system and each one of DS, PSP, Wii and PS3 had a well defined role in the market however already back on the DS/Wii era everybody in Japan got the memo that Nintendo (as in the software publisher Nintendo) was stronger than the rest put together which steered the actions and expecations with the following generations.
Nowadays most japanese third-party games are shared between Nintendo platforms and PlayStation platforms: