Yes this is socially acceptable. Yes Japan has a problem. I could argue this in a lot of ways but I am besot with the Devil cold and am low on output. I could probably show that to a random sampling of 100 Japanese people that I know and be lucky if 5 found it offensive. That being said, there is a kind of tradition in Japan of performing in blackface as being a tribute to black performers. I think that should be reconsidered...but... Yeah, it"s pretty shameful.