Japanese Beautiful Model

Song Playing At Yodobashi Camera in Akihabara?

Hey, During a holiday in Tokyo I went to a very large electronics store called Yodobashi Camera in Akihabara. I was in the headphone section trying out some of the models which were all playing this particular song on loop. It was sung by a female vocal and sounded sad but it was really beautiful and I really would like to know the name of it. Unfortunately I don't speak much Japanese and wasn't able to read/ask anyone there about it. I know this is a bit of a long shot but does anyone have any idea who it might have been? (Hopefully someone here lives in Tokyo or has recently been too! :P)

Public Comments

1. A big song last year that was kind of sad though it was a few years ago was Ayaka- I Believe http://www.youtube.com/watch?v=tQzFNw9DITU&feature=related or http://www.youtube.com/watch?v=oYsuGM0tqtw Why does every answer get thumbs down on the Yahoo Answers Japan section? If you people have the answer to the questions, why don't you people take the time to answer the question and/or get a life?
2. The song could be Misia's Hoshi no youni.... http://www.youtube.com/watch?v=sBtBGP9wv8A This song was very popular last December, because the song serve as theme song for the 2009 Ultra Series film Mega Monster Battle: Ultra Galaxy Legend The Movie(大怪獣バトル ウルトラ銀河伝説 THE MOVIE, Daikaijū Batoru Urutora Ginga Densetsu Za Mūbī) The film premiered in theaters last December 12, 2009. The song is also popular, the fact that Ultraman became a sponsor for Misia's charity organization, Child Africa.