Pulse Day (Myaku no Hi)

What Is Pulse Day?

March 9 each year is "Pulse Day," established by the Japan Stroke Association (公益社団法人日本脳卒中協会), which works to spread correct knowledge about stroke and prevent it. The date comes from a wordplay: "mya (3) ku (9)" sounds like "myaku" (pulse). Strokes caused by atrial fibrillation, a type of irregular heartbeat, tend to be severe, but many can be prevented with proper management; the day encourages people to check their own pulse as a first step. Its English name is "Check Pulse Day."

Atrial Fibrillation and Stroke

Left unnoticed, atrial fibrillation can lead to serious illness.

• A leading cause of stroke: Atrial fibrillation makes it easier for blood clots to form in the heart; if a clot travels to the brain, it can cause "cardiogenic cerebral embolism." This type of stroke tends to be severe and can be life-threatening or leave serious after-effects such as speech problems and paralysis.
• Preventable with treatment: Appropriate anticoagulant therapy for people with atrial fibrillation is known to prevent about 60% of such strokes.
• Often no symptoms: About half of people with atrial fibrillation are said to have no noticeable symptoms, so self pulse checks and ECG tests are important for early detection and treatment.

Interesting Facts About Your Pulse

• Normal resting heart rate: A healthy adult's resting pulse is generally 60–100 beats per minute. Check not only the rate but also whether the rhythm is irregular.
• Measure at rest: Tension and exercise speed up your pulse, so self-checks are best done while sitting quietly.
• Pulse diagnosis through history: In traditional East Asian medicine, "pulse diagnosis"—reading a person's overall condition from their pulse—is a long-standing technique still used in Kampo (traditional Japanese herbal) medicine today.
• Heart rates across the animal kingdom: Generally, smaller animals tend to have faster heart rates—mice can reach several hundred beats per minute.
• Atrial Fibrillation Week: The Japan Stroke Association designates March 9–15 as "Atrial Fibrillation Week" to raise awareness of atrial fibrillation and stroke prevention.

Listening to the Quiet Rhythm of Life

Pulse Day is a chance to reconnect with the rhythm of your own heartbeat—the sound of life itself. Your heart keeps beating even while you sleep, a steady reminder of all you've lived through and the energy that carries you forward. On March 9, take a moment to pause and gently feel your wrist. If anything feels unusual, consult a doctor early. Listen closely to how you feel, and take a step toward a healthier tomorrow.

Tips for Making the Most of Pulse Day

• Take one minute to check your pulse at your wrist and see whether the rhythm feels steady—a simple "self pulse check"
• Use a blood pressure monitor or smart device to record your normal readings and build awareness of your health
• If your pulse feels irregular or palpitations and shortness of breath persist, get an ECG at a medical facility early
• Since "3-9" can also sound like "thank you" in Japanese, take a moment to thank your heart for working hard for you

A Steady Rhythm Builds a Steady Future

March 9 is a day to tune in to your body's rhythm and find a sense of calm reassurance. Just like a steady heartbeat, taking things one step at a time can carry you toward any goal. May today be a wonderfully "settled" day, full of health and hope, as you take a new step forward!