Sapphire Dingler was shaken as the dark past emerged before her. AdvertisementDingler, a US master’s student in public history at Southern New Hampshire University, was sifting through newly digitised American archives when she stumbled upon testimony about a Japanese doctor’s grisly wartime experiments on Western prisoners in Tokyo. One of Tokuda’s “nutrition” experiments involved repeated intravenous injections of soy milk into prisoners of war. The resulting seizures and deaths were documented in witness testimony in the archives. AdvertisementThe California-based non-profit Pacific Atrocities Education, where Dingler was an intern this summer and read about Tokuda, is on a mission to change that.