This is such a bad take.
Japan is the 2nd biggest market for Sony after the US. Its still incredibly important and the PS4 has pretty much stabilised the decline of home console gaming:
PS2: 21 million
PS3: 10.2 million
PS4: 9.3 million+
N64: 5.5 million
GCN: 4 million
Wii: 12.7 million
WiiU: 3 million
PS4 and PS5 will get more Japanese games than any other console and its because the overseas market is far bigger than the domestic. Every single third party Japanese developer knows this, Capcom, SE, Namco, TK, SEGA....
Its common sense why for timezones one would have
US + South America + EU + Middle East > Asia