A four-character idiom meaning to be preoccupied with superficial differences and miss the essential point — equivalent to 'six of one, half a dozen of the other.'
値段や見た目の差にこだわっているが、本質は同じなら朝三暮四だ。
You're fixating on price and appearance, but if the substance is the same, it's six of one and half a dozen of the other.
議論は細部の違いばかりで、本当に重要な点を見落としている。まさに朝三暮四だ。
The debate focuses only on minor differences and overlooks what's truly important — that's exactly morning-three-evening-four (朝三暮四).