Pollen Count & Forecast for Chiba

Chiba’s spring allergy season (February-May) is dominated by cedar and cypress; Japanese Cedar (Cryptomeria japonica) is high from the Boso Peninsula hills; Japanese Cypress (Chamaecyparis obtusa) is widespread in regional woodlands. Oak (Quercus) contributes significantly from Chiba Park and local green spaces. Summer (May-August) sees high Grass (Poaceae) pollen levels, originating from the Miyako River banks and Inage Seaside Park.

Sea breezes from Tokyo Bay transport pollen inland; high coastal humidity traps particles near the ground. Autumn and winter see elevated Mould (Alternaria, Cladosporium) spore counts, from leaf litter in Aoba-no-Mori Park and damp urban corridors.