Masami Akita (秋田 昌美, Akita Masami, born December 19, 1956), better known by his stage name Merzbow (メルツバウ, Merutsubau), is a Japanese noise musician. Since 1979, he has released over 350 recordings.

The name "Merzbow" comes from German artist Kurt Schwitters' artwork, "Merzbau". This was chosen to reflect Akita's dada influence and junk art aesthetic. In addition to this, Akita has cited a wide range of influences from progressive rock, free jazz, modern classical and musique concrète to BDSM and Japanese bondage. More recently, he has been inspired by animals, animal rights, and environmentalism.