There are at least two artists with this name:
1) KAN is a Japanese singer-songwriter.
2) KAN is a contemporary folk band from the UK.
1) KAN (born Kan Kimura 木村和 on September 24, 1962) is a Japanese singer-songwriter. He debuted in April 1987 with an album and single both titled テレビの中に (Terebi no naka ni, "In the TV"). His last release was at the end of 2011 (the single "Listen to the Music"), but he continues to play live shows throughout the world.