International Anti-War Day (Kokusai Hansen Day)

What Is International Anti-War Day?

Every year on October 21st is "International Anti-War Day." It commemorates October 21, 1966, when Japan's General Council of Trade Unions (Sōhyō) called for unified action against the Vietnam War, in solidarity with anti-war movements around the world. Beyond being a political statement, this day is an opportunity to logically reconsider how essential a "sustainable peace"—free of violence and conflict—is as a foundation for our lives, our economy, and our intellectual development.

The Historical Fact of "Solidarity and Nonviolence" and Social Psychology

The history of International Anti-War Day demonstrates how individual voices can cross borders and generate large-scale social dynamics.

• A wave of solidarity around the world: In the late 1960s, opposition to the Vietnam War merged with music, art, and academia to form a global network centered on young people. This was a historic communication victory in which information crossed physical barriers and converted into the energy of "empathy."
• "Peace tech" in 2026: Today, technology using AI and blockchain is being implemented to detect early signs of conflict and increase transparency in refugee support. We've entered an era of not just "wishing" for peace, but "engineering" it.

The Scientific Perspective: How "Psychological Safety" Unlocks Advanced Thinking

A peaceful environment is an absolute prerequisite for our brains to perform at their most creative and logical level.

• Calming the amygdala, activating the prefrontal cortex: In a "safe state" free from the threat of conflict or violence, activity in the amygdala—which governs anxiety—calms down. This allows blood flow to concentrate in the prefrontal cortex, responsible for logical thinking and decision-making, scientifically unlocking humanity's higher intelligence and creativity.
• Oxytocin and overcoming "in-group bias": Oxytocin, released through trusting (peaceful) interactions with others, not only eases fear but also increases empathy for others. This makes it possible to logically overcome the "us vs. them" binary bias and adopt multiple perspectives.

Fascinating Facts About Peace

• The logic of "positive peace": Not merely the absence of war (negative peace), but a state where structural violence such as poverty and discrimination has also been eliminated. Maintaining this comprehensive balance (homeostasis) is a social-engineering goal.
• The 2026 "dialogue algorithm": Today, "consensus-building AI" is gaining attention for its ability to break through echo chambers on social media and logically connect people with differing opinions. It's an intellectual attempt to resolve conflict through technology.
• The "peace dividend": The economic and social benefits gained by redirecting military spending toward education, healthcare, and science and technology. Investing resources in "creation" rather than "destruction" is the most cost-effective intellectual investment possible.
• Non-verbal communication and peace: Smiles, handshakes, and music all bypass language barriers and activate mirror neurons in the brain. This is a form of empathy engineering—a survival strategy for sharing the fundamental "affirmation of life."
• Historical literacy: Analyzing past mistakes as data to prevent recurrence. Studying history is, in itself, intellectual risk management for predicting the future and avoiding crises.

Ideas for International Anti-War Day

• To mark "International Anti-War Day" on October 21st, try taking action to resolve a "small conflict" in your own life. Deepening mutual understanding through careful dialogue is a form of micro-level peacebuilding, and it can be a chance to boost your own sense of psychological safety.
• Engage with the "stories" of people from different cultures and backgrounds. Increasing your understanding and imagining others' pain and joy trains the brain's empathy circuits, a great way to upgrade the quality of your relationships heading into the second half of the fiscal year.
• Define and put into words "what peace means to you." Arranging an environment where you feel calm is a form of intelligent self-management that supports stable performance.
• Express "gratitude." For the infrastructure, family, and friends who support your peaceful daily life. Reaffirming the happiness hidden in the everyday is a form of self-care that scientifically raises self-esteem.

The "intelligence of empathy" that respects and resonates with others will bring crystal-clear peace and high creativity to your daily life, and the "bold step forward" of building a future through harmony will give you the energy to make tomorrow richer

October 21st is a day to connect the "prayer for peace" that people around the world once held to your own actions today. Peace doesn't begin somewhere far away—it begins with the stillness in your own heart and a kind gaze toward your neighbors. Six months into the fiscal year, has the rush of daily life made you neglect the "calm" within yourself, or your "connection" with others? Today, take a moment to pause and savor the value of inner and outer peace. The positive resolve born from a healthy, calm heart will become the driving force that lets you sprint through this new season more vividly and with greater confidence than ever. Let's welcome a wonderful autumn with a gentle rhythm.