displaced orphans; displaced children
General term for children left behind or separated from their families due to war, disaster, or other upheaval.
The war produced many displaced orphans.
Japanese orphans left in China after WWII; war-displaced Japanese in China
Specifically refers to Japanese children who were separated from their parents and left behind in China at the end of World War II, often raised by Chinese families. A historically significant term.
The issue of Japanese war orphans left in China has long been addressed in Japan-China relations.