Agree with other posters that you basically need isolation with her. Japanese girls DO f*ck, in fact it's culturally acceptable and just fine....but this is America, she's probably worried about that because she's misinterpreted what she's heard. May be good to slow down the C&F with her a little and play it a bit more AFC, cultural differences have f*cked me in the past because they don't get the humor and just think your kind of a d*ck. Maybe after badminton get her one on one and tell her about this really cool movie you want to rent, and ask her if she wants to tag along. Watch movie at your place, come up with a reason to hang out in your room and get those intense eyes, triangular gaze lips eyes, lips eyes and just go for it. No asking or testing. Create a romantic moment and slowwwwly get to a point where you're slamming the sushi