You've seen the exhibition [docomo] Hatsune Miku mobile phone of "Xperia feat. HATSUNE MIKU"

NTT DoCoMo, started the actual exhibition from August 9, is scheduled to be limited release of 39,000 units in late September the "Xperia feat. HATSUNE MIKU".
This prior exhibition, will be on display and docomo smartphone lounge (Sapporo, Tokyo, Kyoto, Umeda, Kobe, Fukuoka) of six locations nationwide, Sony Showroom / Sony Store (Ginza, Nagoya, Osaka) of three locations.
I tried carrying a leg to DOCOMO smartphone lounge of Tokyo actually!

http://blog.mobiledatabank.jp/archives/51393736.html