石橋(いしばし)を叩(たた)いて渡(わた)る

いしばしをたたいてわたる
expression
to be extremely cautious; to look before you leap
proverb
1. to be extremely cautious; to look before you leap
Literally 'to tap a stone bridge before crossing it': to take great care even with something that is already safe. Usually approving, though it can suggest too much caution.
彼(かれ)は石橋(いしばし)を叩(たた)いて渡(わた)るタイプだ。
He's the type who never takes chances.
石橋(いしばし)を叩(たた)いて渡(わた)るように、慎重(しんちょう)に計画(けいかく)を進(すす)めた。
We moved the plan forward with the utmost caution.
投資(とうし)では、石橋(いしばし)を叩(たた)いて渡(わた)るくらいの慎重(しんちょう)さがちょうどいい。
In investing, being extremely cautious is just right.

Common patterns

Similar words