Arai (first name unspecified)

The Shinjuku Equation

He confesses to a murder. The victim is still alive. In Tokyo, Tatsuya Onda brings the police a precise memory of a crime. For Arai and Sakamoto, his account is a puzzle: places, times, verifiable details—and a woman, Mika Shiraishi, who has not been killed. Should they protect a possible victim or watch a man who has done nothing yet?