So here it is!
Name: KAN (real name Kan Kimura)
Home town: Fukuoka
Blood Type: AB
In Spring 2002 he came to France in the "Ecole Normale de Musique de Paris" (National School of Music of Paris) to finish studying classical piano.
In Summer 2004, after being back to Japan, he has decided to sing to his own accompaniment. Then he made a nation-wide tour with the support of a student orchestra.
His last album, the 15th, Kanshigai mo Hanahadashii Watashi no Jinsei has been released in 2010.
For more informations, you can check his official website here.
Here is one of his music video, Yokereba Isshou ni:
And here is of course Ai wa Katsu, on which you can see him playing the piano and singing: