Free Lost In Japan piano sheet music is provided for you. So if you like it, just download it here. Enjoy It! Lost In Japan is a song recorded by Canadian singer and songwriter Shawn Mendes. It was written by Mendes, Scott Harris, Nate Mercereau and Teddy Geiger, with production handled by Mendes, Mercereau, Geiger and Louis Bell. The song was released by Island Records on March 23, 2018, as the second single from Mendes' upcoming third studio album.