Spotted on the platform at JR Ebisu Station:
To the right, White Knight Chronicles.
To the left, Rhythm Tengoku Gold.
Is it just a coincidence that they're right next to each other? Yes, probably.
The girl in the Rhythm Heaven billboard, by the way, is Miho Kanno. She's freaking hot... but you probably didn't need me to tell you that.
Here's what she looks like in motion when playing the game: