Kazunari Ninomiya (二宮 和也, Ninomiya Kazunari, born June 17, 1983), often called Nino, is a Japanese idol, singer, songwriter, actor, voice actor, and radio host. He is a member of the Japanese boy band ARASHI and is best known to Western movie audiences for his portrayal as Private Saigo in the 2006 Clint Eastwood war film Letters from Iwo Jima.