Well, it is Sony's fault. They showed the japanese customer that they aren't a priority for PS4. They released later and focused on western games. Only this year they started to focus to Japan, with Monster Hunter World. But the effect of that game has worn off, now Sony must put more effort in it to keep the japanese gamers.
Eh, PS4 has had the backing of pretty much every major Japanese publisher, it basically only lacks Yokai Watch in terms of big Japanese IP.
That doesn’t necessarily means that Japanese publishers know how to appeal to their own local market.