Citizen volunteers' disclosure request and web database for post-vaccination deaths among 4 million mRNA COVID-19 vaccine recipients in Japan: A massive wave of deaths occurring months after vaccination, amplified and prolonged by frequent dosing

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Authors: Hiroshi Arakawa, Takayasu Hamao, Disclosure Request Team of United Citizens for Stopping mRNA Vaccines and Yukoku Union, Yasufumi Murakami
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Abstract

While mass vaccination campaigns of COVID-19 vaccines slowed after the 3rd dose in Europe and the United States, Japan continued its world-leading vaccination program, including up to eight doses by 2024. Since the start of COVID-19 vaccinations in 2021, Japan has experienced significant excess mortality. Despite government agencies holding data on vaccination status and deaths among vaccine recipients, the entire scope of potential vaccine-related harm remained unclear. Citizen volunteers collected data from municipalities nationwide, totaling 17,545,662 doses administered to 4,025,948 individuals in the retrospective cohort study. Notably, mortality rates sharply increased several months after vaccination. Furthermore, multiple doses correlated with increased mortality; each additional dose led to earlier deaths and prolonged periods of elevated mortality. The massive deaths associated with vaccination may have been overlooked until now because the majority of deaths have occurred not immediately after vaccination, but several months later. The total number of Japanese individuals who died within one year of vaccination between 2021 and 2024 was estimated to be approximately 3.89 million. While this figure does not necessarily represent the number of people who died directly from the COVID-19 vaccination, it suggests that far more lives were impacted by the vaccine than commonly believed. It raises the possibility that the COVID-19 vaccine caused accelerated aging in Japanese individuals, potentially leading to death at an earlier age than their natural lifespan. The web database of the “COVID-19 Vaccine Data Disclosure Request Project” is publicly available at: https://stop-mrna.sakura.ne.jp/db/home_en.php

Fields of Study & Subjects

SARS-CoV-2 and COVID-19 Research Vaccine Coverage and Hesitancy Pharmacovigilance and Adverse Drug Reactions

Publication details

Journal / source
Zenodo (CERN European Organization for Nuclear Research)
Publication date
16 February 2026
Language
EN
Document type
Preprint