I just returned from the Autobacs Cafe in Tokyo where they had a special Transformers theme for it (Bumblebee outside, all the cute Japanese girls wearing hotpants and tight fit Optimus Prime Tshirts) and I was given a goodie bag of TF stuff. One of them was a signed copy of Aira Mitsuki's new single which features on the Japanese release of the Transformers movie.

More info is here:

http://www.jpopmusic.com/forums/viewtopic.php?t=70282