The Metropolitan Police Department arrested Koichi Hirose on suspicion of dumping the body, which was found earlier in the day on farmland in Kamisu, Ibaraki Prefecture, based on information provided by the suspect. The body was located 12 km from his apartment.
Hirose is said to have told police that he killed the woman after she screamed and then dumped her body. He also told police he first met the victim online before she disappeared last November.
On Nov. 20, the student took a train from Ayase Station in Tokyo to the city of Kashima, Ibaraki Prefecture, and later headed to the adjacent city of Kamisu by taxi. She exited the taxi at a convenience store at around 6 p.m.
The student, a native of Tochigi Prefecture and a resident of Tokyo’s Katsushika Ward, had asked a local resident to show her the way to Hirose’s home before she disappeared. The signal from her mobile phone cut out around 11 p.m. on Nov. 20, near the site where the body was discovered, according to investigative sources.