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Kafunshō in Japan 2026 : What to Expect and How to Check Daily Pollen Levels

by Rachel Anne

Spring in Japan is famous for cherry blossoms, but for many residents it also means the arrival of kafunshō (花粉症) — Japan’s seasonal pollen allergy.

In 2026, experts expect pollen levels to be higher than average in some regions, especially in eastern and northern Japan. Weather forecasts suggest that airborne pollen may be significantly higher than in previous seasons due to favorable conditions for cedar pollen production in the previous year.

When does the 2026 Pollen Season Start?

In most parts of Japan :

Early February: Cedar pollen begins spreading
Late February – Mid March: Peak cedar pollen season
Late March – Early April: Cypress pollen peak

This means many people will experience allergy symptoms for 2–3 months during spring.

Major cities like Tokyo, Osaka, and Nagoya typically start seeing pollen around mid-February, with the worst levels appearing in March.

Common Kafunshō Symptoms

People suffering from pollen allergy may experience :

Sneezing repeatedly
Runny or blocked nose
Itchy or watery eyes
Sore throat or cough
Fatigue

Some residents even say it feels like having a long cold during spring.

Where to Check Daily Pollen Levels in Japan

Just like weather forecasts, Japan also provides daily pollen forecasts. You can check them using these websites or apps :

Online Pollen Forecast Websites

Weather Underground – Shows pollen levels and air quality for cities like Tokyo.

https://www.wunderground.com/health/jp

IQAir Pollen Report – Provides real-time pollen index and allergy risk.

https://www.iqair.com/pollen/japan/tokyo

Weather.com Allergy Tracker – Shows 3-day pollen outlook and types of pollen.

https://weather.com/forecast/allergy

Popular Apps in Japan

Many residents use these apps to monitor pollen:

Yahoo Weather Japan
Tenki.jp
Pollen Forecast apps

These services show daily pollen intensity levels so people can prepare before going outside.

Tips for Surviving Kafunshō Season

To reduce symptoms during high pollen days :

Wear a mask when going outside
Use allergy medicine
Shower and change clothes after going home
Avoid hanging laundry outside
Check the daily pollen forecast before leaving

Warm, windy, and sunny days often have higher pollen levels, especially after rain.

Kafunshō season is a yearly challenge for millions of people in Japan. With pollen levels expected to be higher in some areas in 2026, staying informed about the daily pollen forecast can help you prepare and reduce allergy symptoms.

Checking pollen levels regularly and taking simple precautions can make spring in Japan much more comfortable—even during peak pollen season.

Posted : 11 March 2026