June 4 marks one week since the murder of four women and a police officer in Nakano City, Nagano Prefecture. The police believe that the suspect initiated the incident believing that he was being badly spoken of.

They will also investigate the motive and mental state at the time of the incident. On May 5, Yukie Murakami (25) and Yasuko Takeuchi (66), who live nearby, were stabbed with knives. Lt. Yoshiki Tamai (70) of the Nakano Police Station and Sergeant Takuo Ikeuchi (46) were shot and killed with hunting rifles.