This was announced by the representative of the main police department of the prefecture.
According to TASS, in the interests of the investigation, the police have not yet begun to disclose all the details.
Abe died in the hospital after an assassination attempt was made on him during a speech during the election campaign in the city of Nara.
The politician was shot twice by 41-year-old Tetsuya Yamagami.
Abe was taken to the hospital by helicopter, during the transfer his condition was already critical.