Kimi ga Iru Kara (single) Catalog # Composers Arrangers Producers Publisher CD Info Length Release date Kimi ga Iru Kara (君がいるから) is a single of the theme song of the Japanese version of Final Fantasy XIII, sung by Japanese singer Sayuri Sugawara, and said artist's second single. Another edition includes a DVD featuring the game's trailer shown at Tokyo Game Show. The lyrics for "Kimi ga Iru Kara" and "Eternal Love" were written jointly between Yukino Nakajima and Sayuri Sugawara, while the lyrics to "Christmas Again" was written by Kazuki Matsumoto.