I'm not buying so much the idea that the japanese audience doesn't care about graphics, at least in the case of the PS4.
If we look at which games does sell on PS4 and which games does not... well, the best sellers are big and beautiful japanese games (MGS V, Dark Souls III, Dragon Quest Heroes, Bloodborne) and big and beautiful western games (GTA V, Star Wars Battlefront, COD Black Ops III, Battlefield 4, Uncharted 4, The Witcher 3).
On the other side, charts are showing since day 1 that the japanese audience didn't buy PS4 to play low effort Muso/Hunting games, niche otaku games or remasters from PS3 and PS Vita (I'll give you FF Type-0 HD, but that's it).
With that said, I don't know if Japan will embrace PS4 Pro with the same strengh as the West, but I think the hardware sales on November 10 will show something. Now that I think about it, with Media Create and Famitsu we are certainly getting the split between PS4 and PS4 Pro each week, that's neat