At first, Asa Nonami’s Now You’re One of Us ambles along like one of Yasujiro Ozu’s movies about Japanese home life, a drama of manners about marriage and extended families. Then it reveals its real subject by degrees—how a cult mind-set works to seduce outsiders and break their resistance—and it goes from Ozu coziness to full-blown Takashi Miike madness. In a good way, that is.