noun
drizzle; scattered rain
Archaic literary term for light, intermittent rain. Not used in modern everyday Japanese; replaced by words like 小雨 (こさめ) or 霧雨 (きりさめ).
古い和歌には「疎雨」が秋の情景として詠まれることがある。
In old waka poetry, '疎雨' is sometimes used to evoke an autumn scene.
Compound of 疎 (so, 'sparse') and 雨 (u, 'rain'). The exact historical derivation is uncertain, but the word follows classical Chinese poetic usage.