World Alzheimer's Day

What Is World Alzheimer's Day?

Every September 21, the world observes "World Alzheimer's Day." It was established on September 21, 1994, at an international conference of Alzheimer's Disease International (ADI) held in Edinburgh. It's a global awareness day aimed at deepening understanding of Alzheimer's disease and dementia and expanding support for patients and their families. As of 2026, dementia is increasingly recognized as something "anyone could experience," calling for greater scientific understanding and social inclusion.

The History of Living Together Through Better Understanding

Society's understanding of dementia has shifted logically over time from viewing it as an "incurable disease" to seeing it as "a condition we can live with and manage," alongside advances in medicine.

• Dr. Alois Alzheimer's discovery: In 1906, German psychiatrist Dr. Alois Alzheimer discovered and reported distinctive brain changes—amyloid plaques and neurofibrillary tangles—in a patient with a specific memory disorder. This marked the scientific definition of the disease.
• Dementia legislation and social implementation: In Japan, the "Basic Act for Promoting Dementia-Inclusive Society" took effect in 2024. This marked a major societal shift, reframing people with dementia not merely as people to be supported, but as active participants in shaping society together.

The Science of "Cognitive Reserve": Prevention and Living Together

Cutting-edge brain science is uncovering mechanisms by which lifestyle optimization can delay onset and help maintain brain function.

• Cognicise (cognitive-motor training): Combining "cognitive tasks" like calculations or word games with "physical tasks" like walking. This dual-task approach has been scientifically shown to promote blood flow to the brain and strengthen neural networks, helping to slow cognitive decline.
• Cognitive reserve: Continuing to stimulate the brain through education, work, and hobbies builds "backup circuits" in the brain. If part of the brain is affected by disease, other circuits can compensate—this logical backup function is key to maintaining quality of life (QOL).

Intellectual Facts About Dementia

• Amyloid beta and cutting-edge care in 2026: Amyloid beta is considered a key factor in Alzheimer's disease. Tests for early detection of its buildup and new drugs aimed at removing it have advanced significantly, logically increasing the value of early detection and intervention.
• Hearing loss and dementia risk: Epidemiological evidence shows that untreated hearing loss reduces the amount of information reaching the brain, increasing the likelihood of cognitive decline. Properly using hearing aids is one of the most rational ways to keep the brain active.
• Social connections (social capital): People with frequent social interaction tend to have a lower risk of developing dementia than those who are isolated. Conversations stimulate broad areas of the brain and offer a scientific benefit to mental resilience.
• The orange ring symbol: A symbol identifying dementia supporters. The orange color represents warmth and approachability, a deliberate piece of design that visualizes the psychological safety of being watched over by the whole community.
• Digital reminiscence therapy: Using VR (virtual reality) to recreate scenes from the past and stimulate memory. This non-drug therapy uses the latest technology to activate the brain's emotional systems and bring psychological stability—and it's drawing growing attention.

Tips for Spending World Alzheimer's Day

• To mark "September 21 (World Alzheimer's Day)," give your brain a new kind of stimulation—try something you've never done before. Cook a new recipe, or take a different route home. Stimulating brain plasticity is a great way to cultivate the intellectual flexibility you'll need for the second half of the new fiscal year.
• Have an open conversation with family or loved ones about "future care." Preparing logically for an uncertain future—through advance directives, for example—is a risk-management step that minimizes psychological anxiety for both you and your loved ones.
• Try imagining the perspective of someone living with dementia. Learn how the world might look and feel to them, and why they might feel anxious. Taking on multiple perspectives is a way to build the kind of advanced empathy that's valuable in customer understanding and team building at work.
• Take an interest in local awareness events or "orange light-up" campaigns. Recognizing society's collective efforts helps you reaffirm and update the safety net surrounding the environment you live in.

The Thread of Memory That Has Woven "Your Story" Deserves to Be Cherished and Protected—And the "Gentle Intelligence" of Supporting and Understanding One Another Will Give You the Energy to Build a Richer Tomorrow

September 21 is a day not to fear the anxiety of forgetting, but to deepen the connections you have now and to imagine a future where everyone can live as themselves. Protecting brain health also means continuing to believe in your own potential. A few months into the new fiscal year, have you been so swept up in the flow of information that you've failed to hear the voices of your loved ones—or your own heart? Today, take time to enjoy slow conversation and stimulate your senses. Walking forward with genuine understanding and empathy will give you the energy to move through the new season more gently and with a warmth no one else can match. Wishing you a wonderful, compassionate autumn.