From hidden family records to national archives, a son uncovers a chilling wartime legacy. https://www.japantimes.co.jp/news/2025/08/13/japan/history/unit-1644-nanjing/?utm_medium=Social&utm_source=mastodon #japan #history #wwii #imperialjapanesearmy #biologicalweapons#unit731 #unit1644 #china