Japan, 1961 — dissident coup conspiracy
Event Summary
On 12 December 1961 Japanese police foiled the Sanmu Incident, the first attempted coup in postwar Japan. The plot was organised by former Imperial Japanese Army officers and right wing ultranationalists, including Major General Tokutaro Sakurai, under the direction of Kawaminami Toyosaku. The conspirators planned to deploy around two hundred men to storm and occupy the National Diet in Tokyo, assassinate Prime Minister Hayato Ikeda and members of his cabinet, and detain Communist Party and labour leaders, then declare a national emergency and install a regime promising no taxes, no unemployment and no war, the three no's from which the incident takes its name.
Acting on prior intelligence, the National Police Agency launched preemptive raids that morning on the plotters' safehouses, arresting the conspirators, some of them serving Self-Defense Forces personnel, and seizing uniforms, rifles, grenades and swords. The plot grew out of ultranationalist anger after the 1960 Anpo crisis; the only comparable later attempt was Yukio Mishima's in 1970.
Researched Details
Researched
Independent research, added record by record. Hover any label for what it means.
Sources
Editorial Note
Cross-Reference
Only one dataset carries it. One of the three reference datasets we check against carries this event; the others do not list it. That is not a contradiction — the datasets cover different periods and use different thresholds — but it means the record has had less outside corroboration.
Identifiers for finding this same event in the other datasets:
- Cline Center id
74012121961
How the match is made is described in crossref-report.md.
Outcome and Target
Coup Atlas research identifies the target as: Prime Minister Ikeda was unharmed; the plot was foiled before mobilisation and the conspirators arrested.
Baseline coding: Plot discovered and disrupted before execution. Recorded leader fate: remained in office; not physically harmed. The baseline file does not name individual targets; researched names are kept in a separate layer.
Baseline Dataset Citation
Baseline Source-Document Entries
New York Times
The Ottawa Citizen
Wikipedia
This is the citation trail carried by the baseline dataset, grouped by outlet and rejoined from the line-wrapped original. Coup Atlas has not independently re-checked every document; read the original before citing a specific claim. URLs the import damaged beyond safe repair are shown as plain text and listed in citations-report.md. How this list is built →