This song is pretty popular.  Kana Nishino is pretty good.  WISE isn’t that bad, he’s from the Teriyaki Boyz.  First time I saw him he had some song with BOA.

http://en.wikipedia.org/wiki/Teriyaki_Boyz

http://en.wikipedia.org/wiki/Wise_(rapper)

http://www.nishinokana.com/

会えなくても feat. 西野カナ / WISE (Official Universal Music Japan Youtube link)

Kana Nishino – Style PV (Soul Eater 2nd ED)

Youtube search: Kana Nishino Style

Youtube search: Kana Nishino

Youtube search: 西野カナ