I think I have seen most or maybe all of the Japanese girls on the roster at Ginza, although it would have been a year ago for some and much more than that for others, so I won't make any comments on specific girls because it was so long ago.
But speaking generally, basically you either love J girls or you don't.
They are just different other girls.
There are a few that after months or years develop that professional style and approach that some punters like and expect.
But most of them never become professional, but usually try and make up for it with enthusiasm, willingness to please and GFE, and you either love that or you don't.
And as far as looks go, yes there are a few that get that glamour look either through genes, make up, or surgery or some combination of the above.
But most just have that natural girl next door look, and sometimes a bit more meaty than other Asian girls, and again you either love that or you don't.
Enjoy!