Nihyaku Hatsuka (220th Day Typhoon Warning)

What Is Nihyaku Hatsuka?

Around September 11th falls "Nihyaku Hatsuka" (literally "220th day"), one of Japan's traditional seasonal markers known as zassetsu. Counted as the 220th day from Risshun (the start of spring in the old calendar, around February 4th), it has long been regarded as a time to stay alert for typhoons.

A Warning for Typhoon Season During Rice's Flowering Stage

Nihyaku Hatsuka is one of the zassetsu, seasonal markers built into the traditional calendar to guide agricultural work.

• Origin: Counted 220 days from Risshun, this date falls around September 11th on the modern calendar
• Meaning: Because typhoons striking during rice's crucial flowering period can devastate the harvest, this day has long been treated as a time for caution
• The "three unlucky farming days": Together with "Hassaku" and "Nihyaku Toka" (the 210th day), it forms what is known as the "three great danger days" for farmers
• Prayers to calm the wind: In various regions, ritual "wind festivals" (kazamatsuri) have traditionally been held to protect crops from typhoon damage

Wisdom Rooted in Experience, Not Just Statistics

A typhoon doesn't always arrive exactly on Nihyaku Hatsuka, but the heightened awareness of weather during this critical period for rice cultivation reflects generations of accumulated agricultural wisdom.

Ways to Mark the Day

• Check the latest typhoon forecasts and weather updates
• Review your emergency kit and disaster supplies
• Learn about local "wind festivals" and other seasonal traditions
• Explore the history of rice farming in Japan

Turning Respect for Nature into Everyday Preparedness

Nihyaku Hatsuka carries forward an old warning about typhoons just before the autumn harvest. Around September 11th is a good moment to sharpen your awareness of this season's weather and review your own preparedness.