OMSB a.k.a. One Man Slang Band (real name Brandon Katou) is a Japanese producer and rapper. His peculiar producing work (under the name OMSB'eats) is characterized as experimental and dark, present in both his solo albums ("Mr 'All Bad' Jordan" and "Think Good") but also in the popular rap group Simi Lab's two albums: Page 1: Anatomy of Insane and Page 2: Mind Over Matter.