I'm actually going to start learning Japanese this year as a second language, and i'm a RBN playtester already.
I swear to the RBN community, i will try my hardest and never stop until we have After School Tea Time in RB some way!!!!
I mean think about it. They would be the perfect band for RB3. Keyboards, 3 part harmonies, epic geeta (See what i did thar?) bass and drum parts, and there insanely popular right now in japan and the american anime community.