Tuomas Kauhanen (born in Porvoo, Finland in 1985) is a Finnish rapper based in Helsinki. 　　Kauhanen started his career in the early 2000s in Näkökulma. The band released their album Tulikaste in 2003. In the album, Kauhanen used the stage name Eflekti. He then formed Area 04 Fam that also included Doon and MGI (Henri Lanz). The band released the album Kovalla maalla in 2006. In Area 04 Fam, he shortened his name to Efu.