---
title: "Author who exposed activity of Unit 731 dies"
description: "CBRNe World provides those tasked with defending against CBRN and IED threats with the essential practical, scientific and political information. Access the current and previous issues of the magazine by registering as a member."
url: "https://cbrneworld.com/news/subscribers/author-who-exposed-activity-of-unit-731-dies"
date: "2026-07-30T21:53:48+00:00"
language: "en-GB"
---

#  Author who exposed activity of Unit 731 dies

 Written by Gwyn Winfield on 07 August 2023.

Seiichi Morimura, who wrote the book on the wartime Unit 731, that perpetuated the worst chem/bio atrocities on prisoner of war, died aged [90](https://www.nytimes.com/2023/08/03/world/asia/seiichi-morimura-dead.html).

Morimura's book, which came out in 1981, was the first serious expose of the warcrimes that included vivisection, freezing, transfusions with horse blood, prolonged x-ray exposure and pressure chambers. The release of biological agents against the Chinese killed anywhere between 10,000 & 200,000 people, and balloon-bourne bioagents were planned to be launched against the American west coast.

More information on Morimura and the Unit can be found in the link above.

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