Listen to Amar Buke Koto Kosto online. Amar Buke Koto Kosto is a Bengali language song and is sung by Siraj Khan. Amar Buke Koto Kosto, from the album Buke Boro Jontona, was released in the year 2017. The duration of the song is 5:16. Download Bengali songs online from JioSaavn.