石橋を叩いて渡る
いしばしをたたいてわたるishibashiotataitewataru
expression
- being excessively cautious
- knocking on a strong stone bridge before crossing it
いしばしをたたいてわたるishibashiotataitewataru
expression
Data from JMdict, KANJIDIC2 (EDRDG), KanjiVG, CC-CEDICT and Make Me a Hanzi. Sources and licences