A 24-year-old man was arrested Monday on suspicion of threatening to kill a member of a sister group of the popular girl band AKB48, police said.Kazuki Domoto was arrested for threatening Yuka Ogino, a member of NGT48 based in Niigata city northwest of Tokyo, by sending a letter to a news organization by fax on May 9 suggesting he would kill her, according to the police.Last December two people were arrested for allegedly assaulting another NGT48 member, Maho Yamaguchi, who left the group on Saturday. AKS Co., a management company for NGT48, came under criticism for its handling of Yamaguch…READ FULL ARTICLE