Talking with a Japanese person about this issue and their perspective was basically as it follows.
"Although it was criticized by people abroad and a few people within Japan, in Japan we just saw it as an Eddie Murphy cosplay, there was no malice intended, if anything it's admiration to try and look like a certain character as much as possible.
Still, Japan should should become more mindful about the world views of what is considered discriminatory."
Which falls in line with what
TheSporkWithin was saying, that Japanese society don't view it through the same lenses as we do.
The joke isn't that he's black, but that he's Eddie Murphy.
Of course as
Aizō stated, people are still hurt by this type of portraits, which is why it's still important to have this conversations and explain to people why exactly this kind of portraits can be hurtful.