Complex sentence: The song was written by Naoto Kubo, who was also the game's lead composer, with additional contributions to the soundtrack being written by Shiho Fujii and longtime series composer Koji Kondo.
Split into simpler sentences: The song was written by Naoto Kubo, who was also the game's lead composer. Additional contributions to the soundtrack were written by Shiho Fujii and longtime series composer Koji Kondo.