World War II: American forces liberated the Santo Tomas Internment Camp in Manila, the largest enemy-civilian internment camp run by the Empire of Japan in the Philippines.

World War II or the Second World War was a global conflict between two coalitions: the Allies and the Axis powers. Nearly all of the world's countries participated, with many nations mobilising all resources in pursuit of total war. Tanks and aircraft played major roles, enabling the strategic bombing of cities and delivery of the first and only nuclear weapons ever used in war. World War II is the deadliest conflict in history, causing the death of 70 to 85 million people, more than half of whom were civilians. Millions died in genocides, including the Holocaust, and by massacres, starvation, and disease. After the Allied victory, Germany, Austria, Japan, and Korea were occupied, and German and Japanese leaders were tried for war crimes.

Santo Tomas Internment Camp, also known as the Manila Internment Camp, was the largest of several camps in the Philippines in which the Japanese interned enemy civilians, mostly Americans, in World War II. The campus of the University of Santo Tomas in Manila was utilized for the camp, which housed more than 3,000 internees from January 1942 until February 1945. Conditions for the internees deteriorated during the war, and by the time of the liberation of the camp by the U.S. Army, many of the internees were near death from lack of food.

This is an incomplete list of Japanese-run military prisoner-of-war and civilian internment and concentration camps during World War II. Some of these camps were for prisoners of war (POW) only. Some also held a mixture of POWs and civilian internees, while others held solely civilian internees.

The Empire of Japan, also known as the Japanese Empire or Imperial Japan, was the Japanese nation state that existed from the Meiji Restoration on January 3, 1868, until the Constitution of Japan took effect on May 3, 1947. From 1910 to 1945, it included the Japanese archipelago, the Kurils, Karafuto, Korea, and Taiwan. The South Seas Mandate and concessions such as the Kwantung Leased Territory were de jure not internal parts of the empire but dependent territories. In the closing stages of World War II, with Japan defeated alongside the rest of the Axis powers, the formalized surrender was issued on September 2, 1945, in compliance with the Potsdam Declaration of the Allies, and the empire's territory subsequently shrunk to cover only the Japanese archipelago resembling modern Japan.