Who is J?...
Heh heh, only takes me a year to finally get to watching all the extra tracks on the DVDs (yeah, life is busy!)...
Seems to me, daigong, that in the interview (on the Type B DVD) there's a point at which she is asked if the J stands for Japan; but I think she says that it doesn't, and she doesn't give any conclusive answer. I suppose it's some random and probably fictitious guy? Unless anyone found out anything else.
My other comment right now, apart from that I'm digging Tomochin even more after watching this material:
The solo runway show on the Type A DVD is amazing; and you'd never get that she's only 150 cm tall (4 ft 11 ins... though some sources place her at anything up to 154 cm so maybe she's still growing and cracked 5 ft!!) ... BUT unless Japan is different from the rest of the world in this respect, that would be much too short to successfully make it as a runway model - and YET... she is so perfect for it. I watched the 2011 Victoria's Secret show yesterday (yeah, catching up on a lot of stuff!) and apart from perhaps Miranda Kerr I have the hots for Tomochin way ahead of any of those big clunky western girls (okay, I'm Caucasian myself, so don't hate me too much!). But I know I'll never see Tomochin modelling for Victoria's Secret except in my dreams.
Oh well...