重じゅう箱ばこの隅すみ

expression, noun

trifles; insignificant details

Refers to minor, unimportant matters, often used in the set phrase 重箱の隅をつつく (to nitpick).

See also: 重箱の隅をつつく

• 彼かれはいつも重じゅう箱ばこの隅すみをつつくようなことばかり言いう。

  He always says things that are like nitpicking over trivial details.