The Sega America blog writes today that all Japanese music tracks from Let's Tap! will be included in the North American version, no matter how shrill or bouncy they may be. Great news for penguins with a taste for J-pop beats.
Even better news for anyone with a penchant for rapping lightly on cardboard box controllers.
Let's Tap!: US Version to include Japanese Music Tracks [Sega America Blog - thanks, Castor!]