Kazunari Ninomiya (二宮和也, Ninomiya Kazunari?, born June 17, 1983) is a member of Arashi (together with Masaki Aiba, Satoshi Ohno, Sho Sakurai and Jun Matsumoto) a Japanese boy band formed in 1999, under the management of Johnny & Associates. He joined Johnny & Associates at the age of 13 and constantly works as not only an Arashi member but also as an actor. He is the first member of the group to debut in a Hollywood motion picture.