Japanese Surrendered Personnel
Japanese Surrendered Personnel (JSP) was a designation for Japanese prisoners of war developed by the government of Japan in 1945 after the end of World War II in Asia. It stipulated that Japanese prisoners of war in Allied custody would be designated as JSP, which were not subject to the Third Geneva Convention's rules on prisoners, and had few legal protections.
Source: Wikipedia — Japanese Surrendered Personnel (CC BY-SA 4.0)