Otona na no yo! / 1oku 3zenman Sou Diet Oukoku (大人なのよ！／1億3千万総ダイエット王国; I'm an Adult / General Diet Kingdom of 130 Million; second title read as "Ichi-Oku San-Zenman Sou Diet Oukoku"), official English title being I'm an Adult! / 130 million Diet-minded Country, is Berryz Koubou's 34th single. It was released on February 19, 2014 in 5 editions: 2 regular and 3 limited editions.