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Summary

From March 1959 to June 1960, a broad coalition of Japanese citizens, led by the People’s Council to Stop the Revised Security Treaty, protested the ratification of a security treaty with the United States and later demanded the resignation of Prime Minister Kishi Nobusuke. Despite failing to prevent the treaty’s ratification, the campaign succeeded in forcing Nobusuke to resign on June 23, 1960, protecting democratic rights.

Background

In the 1950s, Japan was still recovering from World War II, and many citizens opposed the strong ties with the United States, including the American military presence. Prime Minister Kishi Nobusuke, a former war criminal, came to office without elections and announced plans to revise and ratify a security treaty with the U.S., which would strengthen military ties and obligate Japan to assist the U.S. in case of attack. This prompted a campaign to stop the treaty’s ratification and later to force Nobusuke’s resignation.

What happened

On March 28, 1959, 134 groups formed the People’s Council to Stop the Revised Security Treaty, led by Sohyo and Zengakuren [source: nv-database]. During 1959, the council organized ‘United Action’ days with limited strikes, educational workshops, rallies, car parades, and sit-ins [source: nv-database]. On November 27, 1959, thousands protested outside the Diet, presented petitions, and some occupied the building [source: nv-database]. On January 15, 1960, students occupied Haneda Airport to stop Nobusuke from flying to the U.S., but he still signed the treaty on January 19 [source: nv-database]. On May 19, 1960, Socialist Party members sat-in at the Diet to prevent a vote; Nobusuke had them removed by police, and the treaty was passed within fifteen minutes [source: nv-database]. From May 20, the Socialist Party boycotted the Diet, and the council organized general strikes on June 4, 15, and 22 [source: nv-database]. On June 15, violence broke out when counter-protesters attacked; police arrested protesters, and a young woman was strangled by a police club and died [source: nv-database]. On June 22, over 120,000 people rallied around the Diet, and on June 23, Nobusuke resigned [source: nv-database].

Key people & organizations

  • People’s Council to Stop the Revised Security Treaty
  • Sohyo (Socialist Party)
  • Zengakuren (national student association)
  • Federation of Japanese Women’s Organizations
  • Association of Japanese Literary Persons
  • YMCA
  • Assembly of Jurists
  • Prime Minister Kishi Nobusuke
  • Liberal Democratic Party

Tactics used

The campaign combined mass protests, strikes, sit-ins, and petitions to build pressure, while coalition-building and media support helped broaden participation and sustain momentum. [source: nv-database]

Outcome

Verdict: partial.

The campaign failed to stop the treaty’s ratification but succeeded in forcing Prime Minister Nobusuke to resign, achieving its second goal and protecting democratic rights. The outcome is considered partial because the original goal was not met, but the regime change was a significant victory. [source: nv-database]

Lessons

  • A broad coalition including diverse groups can sustain a campaign and attract widespread support.
  • Nonviolent discipline in the face of repression can increase public sympathy and pressure on the target.
  • Escalation of tactics after a partial defeat can shift the campaign’s focus and achieve alternative goals.

Sources

Disclaimer: Included as a teaching example of campaign craft, not as endorsement.

Sources & verification

  • nv-database — grounding: primary — license: link-only
  • Rewritten: 2026-06-25 via worker_casestudies_v2.py

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