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Japanese cedar pollen hay fever season begins in Tokyo

Japanese cedar pollen (Mainichi/Yasunori Sato)

TOKYO -- Hay fever season for people allergic to pollen from Japanese cedar trees has begun in the capital, the Tokyo Metropolitan Government announced Feb. 17.

    According to the statement, pollen from Japanese cedar starting being dispersed in Tokyo on Feb. 15, one day earlier than the average date over the past 10 years, and nine days later than in 2021.

    The metro government considers the first day from January onward where one or more cedar pollen per square centimeter is observed for two consecutive days as the start of hay fever season. Among the 12 observation points, the start of pollen dispersal was confirmed in Ota Ward on Feb. 15.

    The latest information, including pollen levels, is disclosed on the metro government's website at (in Japanese).

    (Japanese original by Naotaka Ito, Tokyo City News Department)

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