Concealed behind the high walls of a brick building in northeastern China, the horrors that went on in the Japanese Imperial army's Unit 731 remained a secret to the outside world for decades.

Thousands of people are thought to have died within the walls of Unit 731, a secret biological warfare research facility ...

Unit 731 was a secretive Japanese human experimentation complex during the Second World War, where prisoners were deliberately infected with multiple diseases until they died ...

This year marks the 80th anniversary of the victory in the Chinese People's War of Resistance Against Japanese Aggression and the World Anti-Fascist War. Yet in Japan, the concealment of historical ...