相そう場ばが決きまっている

expression, ichidan verb

be taken for granted; be the accepted norm; be the conventional wisdom

Used when a certain way of doing things, a belief, or a social expectation is so established that people accept it without question. Often carries a nuance of 'that's just how it is' or 'everyone knows that'.

• 日本にほんでは、お辞じ儀ぎをするのが相そう場ばが決きまっている。

  In Japan, it is the accepted norm to bow.