Technical report on the alleged BW incident at Changteh, which concludes that the outbreak was linked to the scattering of plague infected materials over Changteh by an enemy aircraft on November 4th 1941.
Summary report from Dr. Edwin V. Hill MD at Camp Detrick, to General Alden C. Waitt (chief chemical corps) regarding biological warfare investigations, 12/12/47
Report to the Secretary of State, Washington D.C., on the plague situation in occupied China during the Winter of 1941, as well as the prevalence of the disease in the different regions beforehand.
Report of Investigation Division by H. Kanemitsu (SCAP), dated November 12th, 1946; on Hosaka's location and the activities he led in the Osaka Office during WW2.