It’s the 31st birthday of Arashi’s resident brat, Ninomiya Kazunari, also known as Nino, Neen, Kazu, Ninomi, Hollywood Sturr, Clint Eastwood’s friend, national gamer… and the list goes on and on.  But even if he is three decades and a year older, he will forever be 17. So on the occasion of his 31st birthday,…