Region
United States --
18
United States
17
Japan
3
Japan --
3
Australia
2
Australia --
2
China --
2
Europe
2
Europe --
2
Great Britain --
2
New Zealand
2
New Zealand --
2
Taiwan
2
Taiwan --
2
Asia
1
Asia --
1
Asia Pacific
1
China
1
Developing countries
1
Great Britain
1
Iraq
1
Iraq --
1
Japan. Rikugan. Kantogun. Butai, Dai 731 --
1
Korea (South)
1
Korea (South) --
1
Malaysia
1
Malaysia --
1
Manchuria
1
Manchuria (China) --
1
Middle East
1
Middle East --
1
Oceania
1
Oceania --
1
Pacific Area
1
Pacific area --
1
Philippines
1
Philippines --
1
South Pacific Ocean --
1
United States - --
1