World Alzheimer's Day

What Is World Alzheimer's Day?

September 21st is "World Alzheimer's Day." On this day in 1994, a declaration calling for greater support for people with Alzheimer's disease and their families was adopted at an international conference of Alzheimer's Disease International (ADI), and ADI established the day together with the World Health Organization (WHO). It is a global awareness day to deepen understanding of dementia, including Alzheimer's disease, and to widen support for people living with it and their families. In Japan, awareness activities are led by the "Alzheimer's Association Japan" (Ninchisho no Hito to Kazoku no Kai).

Living Together Starts With Understanding

Society's view of dementia has gradually changed along with medical progress and the voices of people living with it.

• Dr. Alzheimer's report: In 1906, the German psychiatrist Alois Alzheimer reported characteristic changes (senile plaques and neurofibrillary tangles) in the brain of a female patient who had developed memory problems and other symptoms. The disease is named after him.
• Japan's Basic Act on Dementia and "Dementia Day": In 2024, Japan's "Basic Act on Dementia to Promote an Inclusive Society" came into force. Under this law, September 21st—aligned with World Alzheimer's Day—is "Dementia Day" (Ninchisho no Hi), and September is "Dementia Month."

September Is "World Alzheimer's Month"

Since 2012, the whole of September has been "World Alzheimer's Month," with awareness activities held around the world. In Japan, castles, towers, and other landmarks are lit up in orange—the symbolic color of dementia support—and lectures and street campaigns take place around this time.

Things to Know About Dementia

• Alzheimer's is one cause of dementia: "Dementia" is an umbrella term for a set of symptoms; besides Alzheimer's disease, causes include vascular dementia and dementia with Lewy bodies.
• The biggest risk factor is age: As Japan's population ages, dementia has become something close to everyone.
• The "orange ring": An orange ring has been used as a sign for people who have completed a "dementia supporter" training course.
• Seek advice early: If you are worried about forgetfulness, you can consult your family doctor or a community general support center.

Ideas for World Alzheimer's Day

• Learn the basics about dementia, or read about the experiences of people living with it and their families.
• Talk with family and people close to you about future living arrangements and care.
• Look into "dementia supporter" training courses run by local governments and others.
• Notice local awareness events and orange light-ups in your area.

Toward a Society Where We Understand and Live Together

September 21st is a day to think of dementia not as something that happens to "someone special," but as something close to all of us. With accurate knowledge and a little consideration, people with dementia and their families can live more comfortably in the communities they know. Why not take a little extra time today to enjoy a conversation with someone close to you?