◆一寸の虫にも、五分の魂 1sun no mushi nimo, 5bu no tamashii.
- 解釈：つまらぬと思える者にもそれ相当の意地や思慮があるから、侮ってはいけないというたとえ。
- Literal：There is a soul of five "bu" (unit of length) also in the insect of one "sun" (unit of length).
- Interpretation：Also to a little insect, it is a soul of half a sum. Don't despise accessories. Even a worm will turn.
- 類義：粉糠（こぬか）にも根性。蛞蝓（なめくじ）にも角。匹夫（ひっぷ）も志を奪う可からず。痩腕にも骨。