Created by using
1) Kôseishô engokyoku. Hikiage to engo sanjûnen no ayumi (Thirty-year progress of the repatriation and assistance). Kôseishô (Ministry of Health and Welfare, Japanese Government). 1977. P56. (Public Domain)
2) Kôseishô shakai/engokyoku engo gojûnenshi henshû iinkai. Engo gojûnenshi (Fifty-year history of assistance).  Kôsei Rôdôshô (Ministry of Labor, Health and Welfare, Japanese Government). Gyôsei. 1997. pp524-525. (Public Domain)
LEGEND:
NOTE 1.
○ Large Circles with heavy outline (numbered in red): Over 20,000 detained.
● Black circles (numbered in blue): Over 10,000.
○ White, small circles (numbered in black): Less than 10,000.
△ Triangles (numbered in Green): Small number.
NOTE 2. The above-designated graphic symbols show the principal area of the labor camp location.
Own work
Sey Nishimura