いちようおちててんかのあきをしる

一葉落ちて天下の秋を知る

表記・読み：いちようおちててんかのあきをしる

1. 1

   a straw will show which way the wind blows; a falling leaf shows that autumn has come

   expressions (phrases, clauses, etc.)五段動詞（る）proverb