The White Man and the Pachinko Girl

An American business man who lingered in Pachinko parlors every night in his lonely life as a foreigner in the city of Tokyo met Misa, a young Japanese hostess that worked at a Pachinko parlor by chance. Knowing her personal woes, he gave her his winning as an exchange for Japanese lessons. That large sum of money incriminated them to false accuse of sex trade. Meanwhile, an ex-adult film producer Tanaka investigated the death of a certain foreign producer who happened to have filmed Misa in his legendary work, in which she was seemingly strangled to death. Who was this girl that lived among them?