The 'Umu is the fourth studio album by Australian hip hop act Koolism, released in September 2010 by Invada Records. The âÂÂumu is an underground oven used in Polynesian cooking and a nod to MC HauâÂÂs Tongan heritage. Self-deprecation aside, Hau says that the album is "dedicated to the essence of original and classic hip hop, and the title is inspired by an underground oven. Dan and I, along with some close friends, have been cooking up this album since December 2006. And now, in 2010, weâÂÂre finally ready to serve it."