In the Miso soupが好きなら

It is just before New Year's. Frank, an overweight American tourist, has hired Kenji to take him on a guided tour of Tokyo's sleazy nightlife on three successive evenings. But Frank's behavior is so strange that Kenji begins to entertain a horrible suspicion: that his new client is in fact the serial killer currently terrorizing the city. It isn't until later, however, that Kenji learns exactly how much he has to fea…