noun
early autumn typhoon
Refers to a typhoon occurring around the 210th or 220th day after the first day of spring (risshun), typically in early September. A seasonal word (kigo) in haiku.
野分のあと、庭には落ち葉が散り敷いていた。
After the early autumn typhoon, fallen leaves were scattered all over the garden.
From 野 (no, 'field') + 分き (waki, 'to divide, blow apart'), referring to the wind that blows across fields. The exact historical derivation is uncertain.