Well, there's a new Mojib Ribbon video available, if you haven't seen it. It's available here.
http://www.playstation.jp/ch/asx_tgs/pv_mojiburibon.asx
It looks like this is a RAPPING game in Japanese. From what I can tell.. which isn't much, but it seems like you use the analog sticks to produce the Japanese characters (ie. lyrics) for the song. It doesn't look to import friendly if that is the case, and I have also yet to see it advertised that you can use your own CDs for this one. So, from what I can tell, you choose the words for the song, in a sort of DDR / Amplitude fashion. Anyone else have any ideas what's going on? Now, is it just me, or was this not what people were expecting from this game? x_x