Pulse Day (Myaku no Hi)

What Is Pulse Day?

March 9 each year is "Pulse Day," established by the Japan Heart Foundation, the Japan Heart Rhythm Society, and the Japanese Heart Rhythm Society's device association. The date comes from a wordplay: "mya (3) ku (9)" sounds like "myaku" (pulse). The day encourages people to pay attention to their pulse in order to catch early signs of "atrial fibrillation," a type of irregular heartbeat, and prevent serious complications such as stroke.

Atrial Fibrillation and the Medical Importance of Checking Your Pulse

Ignoring an irregular pulse can lead directly to serious health risks.

• 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 more severe than ordinary strokes and can be life-threatening.
• The danger of no symptoms: About 40% of people with atrial fibrillation have no noticeable symptoms. Because the condition can progress unnoticed, regularly checking your own pulse is recommended.

Interesting Facts About Your Pulse

• Normal resting heart rate: A healthy adult's resting pulse is typically 60–100 beats per minute. A rate significantly higher (tachycardia) or lower (bradycardia) than this warrants attention.
• Emotions and heart rate: Anger or anxiety activates the sympathetic nervous system and raises your pulse, while deep breathing engages the parasympathetic nervous system and can calm it back down.
• Pulse diagnosis through history: In traditional East Asian medicine, "pulse diagnosis"—reading a person's overall condition from their pulse—is a technique going back thousands of years, and it's still used in Kampo (traditional Japanese herbal) medicine today.
• Heart rates across the animal kingdom: Generally, smaller animals have faster heart rates—mice can reach several hundred beats per minute, while whales beat only about 10 times per minute.
• The start of "Heart Disease Prevention Week": March 9–15 is designated "Heart Disease Prevention Week," with awareness events on arrhythmia and heart disease held across Japan.

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. That small flutter is your body quietly working to protect you. 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
• Take care of your heart with moderate exercise and a low-sodium diet—maintenance from the inside out
• 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!