What Is Nyūbai (入梅)?
Nyūbai (入梅) marks the official start of the rainy season in Japan, usually around early to mid-June, depending on the region. The term literally means “entering the plum rains,” referring to the seasonal rains (梅雨 tsuyu) that typically coincide with the ripening of ume (Japanese plums).
Nyūbai is not just about weather—it's a seasonal milestone deeply rooted in traditional Japanese calendars, agriculture, and daily life.
When Does Nyūbai Happen?
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Region
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Approx. Start
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Notes
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Okinawa
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Early May
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Rain starts earlier in the south
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Kyushu
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Early June
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One of the first mainland areas
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Tokyo (Kanto)
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Around June 7–10
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Most popular time for Nyūbai
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Tohoku
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Mid–Late June
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Rains arrive later in the north
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Note: Nyūbai is a solar term in the traditional 24 sekki calendar, usually around June 10 or 11, and may not align exactly with meteorological rainy season announcements.
Why Is Nyūbai Important?
Nyūbai is more than just a weather marker. It plays a crucial role in:
Agriculture – Vital rainfall for rice paddies and summer crops.
Seasonal planning – Impacts travel, school activities, and events.
Cultural timing – Symbolically connects to reflection, patience, and endurance.
What to Expect During Nyūbai Season in Japan
1. Weather Conditions
Frequent rain, from light drizzle to heavy downpours
High humidity and overcast skies
Occasional sunny breaks known as "tsuyu no harema" (梅雨の晴れ間)
2. Health & Daily Life
Mold and mildew can become a problem → use dehumidifiers
People switch to quick-dry clothing and rain-friendly footwear
Seasonal skincare and haircare products become popular due to humidity
3. Shopping & Lifestyle
Stores promote rain gear: umbrellas, raincoats, waterproof bags
Cafés and brands offer plum-flavored drinks and sweets
Department stores run rainy season sales to attract indoor shoppers
Cultural Insights During Nyūbai
Hydrangeas in Bloom
June is ajisai (hydrangea) season — temples like Meigetsuin (Kamakura) become famous viewing spots.
Seasonal Festivals
While large festivals are rare during Nyūbai, smaller shrine events and June purification rituals (大祓, Oharae) take place.
Seasonal Foods
- Ume (plums) are pickled during this time → the base for umeboshi (sour pickled plums) and umeshu (plum wine)
- Light, refreshing meals like sōmen noodles, tofu dishes, and seasonal vegetables are enjoyed
Travel Tips During Nyūbai
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Tip |
Details
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Pack smart
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Bring a light raincoat, quick-drying clothes, and anti-slip shoes
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Be flexible
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Have backup indoor activities or museums in your plan
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Embrace the mood
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Visit temples with hydrangeas, enjoy slow travel, and drink seasonal teas
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Stay fresh
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Use dehumidifying sheets in your luggage or suitcase to avoid musty smells
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Summary
Nyūbai marks the beginning of Japan’s rainy season — typically starting in early June — and signals a seasonal shift toward lush landscapes, cooler temperatures, and a slower pace of life. While the rains may seem like a travel inconvenience, they’re an essential part of Japan’s natural and cultural rhythm.
Expect misty mountains, blooming hydrangeas, and fewer crowds at major attractions — making it an unexpectedly magical time to visit.
Don’t let a little rain stop your adventure.
Embrace the beauty of Nyūbai and discover why Japan’s rainy season might just be your next favorite travel secret. If you'd like to travel to Japan, please feel free to contact us!
