Mai Tachihara

In different parts of Tokyo, four young and seemingly healthy people suddenly die of heart failure at exactly the same moment. Reporter Kazuyuki Asakawa decides to investigate the deaths, and discovers that the four had stayed at a rural inn together just a week earlier. At the inn, he comes across a strange video that ends with a message saying that anyone who watches it will die exactly seven days later. Now the clock is ticking for Asakawa. Can he break the curse in time? (imdb)

Rei, the deadly but reluctant assassin for the Zero Division of the Tokyo Police Department, befriends a young man after she sees him cruising a gay bar looking for johns. After he gets ... (imdb)

Tomoyo was the lover of Udo, a leading member of the Japanese mafia. When Udo disappears with a bundle of dirty money, she is a suspected accomplice. Tomoyo is a woman who has always depended on men, and she often sleeps with them in order to survive. (Amazon)

Female detective Eiko Kagami traces the mysterious murders of girls who have had love affairs with a popular writer.