Unit 731, the Imperial Japanese Army’s notorious medical research team, carried out secret Josef Mengele-style experiments on human test subjects. Now some remains from the unit are prompting a reopened investigation into what crimes occurred.
The experiments included hanging people upside down until they choked, burying them alive, injecting air into their veins and placing them in high-pressure chambers.
Now new detail about their victims’ suffering could be revealed after the authorities in Tokyo announced plans to open an investigation into human bones thought to have come from the unit.
A new search is also due to be carried out for mass graves that may contain more victims of human experiments.
The bones are thought to be from up to 100 people and were discovered in a mass grave in 1989 during construction work.
They bore the marks of saws and some of the skulls had drill holes and portions of the bone cut out. But the issue is so controversial in Japan that they have since been stored in a repository.