That why I think rumours of Sony buying SE is not exactly bad, because it shows at least they show a bit care Japanese market.Sony takes pretty much all markets for grandet and care only about the US since it's the only relevant one where MS was somewhat competitive. The problem is this ended up shaping Sony to only have 2 out of 20+ studios to Japanese.
I don't understand where Sony sees a risk, given that plenty of those Japanese publisher are already very profitable.