Roj Roj Koto Aar song is a Bengali modern song from the Hemanta Mukherjee Sandhya Mukherjee released on 0. Music of Roj Roj Koto Aar song is composed by . Roj Roj Koto Aar was sung by Sandhya Mukherjee. Download Roj Roj Koto Aar song from Hemanta Mukherjee Sandhya Mukherjee on Raaga.com.