Yeah, don't walk up to an Asian female and ask to learn karate unless you know for a fact she actually teaches karate. Hunipop shouldn't be taken seriously, ever. In the very loosest sense, yes, showing genuine interest in what a girl likes and facts about her will usually help you, there are plenty of things not to do... like asking what size bra the girl wears is a pretty bad idea, both in that it's creepy and it may make her self-conscious about her tits' size, which is a surefire way to kill romance. You don't need to know her bra size until you've become engaged in a very intimate relationship and you're comfortable actually buying lingerie for her... and even then it's risky because women all prefer different lingerie, which of course also comes in different sizes. What's a B in one company may actually fit a C better, etc. Your best bet? Just enjoy them and leave all things size to her.
Oh, and just because someone is of a certain racial or national descent does not mean they completely identify with it and want themed-based gifts surrounding it. Let's face it, living in America, especially if you're born here, there's a good chance you don't really identify that strongly with a culture that only exists from your (possibly distant) past.
This video did make me wonder what that game was around point number three, with the weird yandere-like check who wants to kill you. Too bad I have no clue what that game is,