令和3年の刑法犯に関する統計資料(PDF) (in Japanese). National Police Agency. August 2022. p. I, II, 2, 17. Archived from the original(PDF) on 19 December 2022. Retrieved 2 February 2023.
令和3年の刑法犯に関する統計資料(PDF) (in Japanese). National Police Agency. August 2022. p. I, II, 2, 17. Archived from the original(PDF) on 19 December 2022. Retrieved 2 February 2023.
National Police Agency Police History Compilation Committee, ed. (1977). Japan post-war police history (in Japanese). Japan Police Support Association. p. 320.