Hello! Pro Egg 2011 Happyoukai ~9gatsu no Nama Tamago Show!~ (ハロプロ エッグ 2011 発表会～9月の生タマゴShow！～) was Hello! Pro Egg's September 2011 Nama Tamago Show concert. The event took place on September 11, 2011 at Yokohoma BLITZ in Tokyo. Otsuka Aina, Mogi Minami and Ogawa Rena were formally introduced during the concert.