Seiichi Morimura, who exposed Japanese atrocities in WWII, dies at 90
washingtonpost.comArticle is paywalled, but I gathered from the teaser that Seiichi Morimura wrote a book regarding Unit 731.
https://en.wikipedia.org/wiki/Unit_731 The entire article is horrifying. Hopefully someone will post an archive link for the WP article.
Crimes so bad the nazis asked them not to proclaim them in official publications.