On the 25th of this month, Yukie Murakami (66) and Yasuko Takeuchi (70), who live nearby in Ebe, Nakano City, were stabbed with knives. Lt.

Yoshiki Tamai (46) and Sergeant Takuo Ikeuchi (61) of the Nakano Police Station, who rushed to the station after receiving a report, were shot and killed with hunting rifles. The police have arrested 31-year-old farmer Masanori Aoki on suspicion of murder against Sergeant Ikeuchi, and are also investigating the suspicion of killing three others.