Where are they growing these well endowed Asian girls? That's what I want to know because... I don't see that shit in reality at all.
They exist; they're kind of like unicorns here. Large breasts are so uncommon in Japan that frequently the ones that end up doing AV work can have only marginally attractive faces and still get a ton of work. Some of them are shaped like fridges, just like that Upton woman you lot seem so fascinated with.
And, of course, many women who have had plastic surgery. One of my friends in Yokohama knows the doctor who did Aki Hoshino's work. He told me he shook the guy's hand, so I congratulated him on having copped a second-degree feel.