Ryo Nagamatsu is a games composer. Nagamatsu has been working with Nintendo. Nagamatsu's first published game was Wii Play released in 2007. Then, Ryo Nagamatsu went on to work on Big Brain Academy: Wii Degree as the composer. Nagamatsu also worked on Mario Kart Wii for Wii. Most recently, Ryo Nagamatsu was involved in the development of Splatoon 2: Octo Expansion.