"Won't Be Long" is a collaboration single by Japanese boy band Exile and Koda Kumi. It is a cover of the song originally sung by the Japanese band Da Bubblegum Brothers in the early 1990s. It is a midtempo song. Koda Kumi's album Black Cherry included two versions of this song (one remixed and another sung entirely by her), both different from the original version. The song was also featured on Exile's album Exile Revolution, this time featuring Exile and Never Land.