There are 6 artists with this name: 1. A Finnish rap artist 2. A Nigerian singer of world/soul music (correct name is Aṣa) 3. A Norwegian singer-songwriter (often written ASA) 4. A Japanese electronic/hiphop producer 5. A Swedish vikingrock/rac band. 6. A British dubstep artist 1. Matti Salo, better known by his stage name Asa, is a Finnish hip hop artist. He released his debut album Punainen tiili in 2001 under the moniker Avain.