The Sakamoto Brothers (formerly ON/OFF), identical twins Naoya and Kazuya, are a J-pop duo that debuted in 2007. They are best known for their numerous opening and ending songs in famous anime such as "Vampire Knight", "Vampire Knight Guilty", "Durarara!!", and "Beelzebub". The group disbanded in 2015. While Naoya entered the advertising industry, Kazuya continued to pursue his artistic career, including as an actor. In 2023, Kazuya celebrated a comeback at the Main Matsuri together with RAZARIS DANCE & VOCAL. This year, the two brothers Naoya and Kazuya will exclusively perform an ON/OFF revival at the Main Matsuri.