noun
gateway to success; stepping stone to fame
Metaphorical expression derived from the legend of a carp becoming a dragon after climbing a waterfall. Used for a crucial opportunity, exam, or institution that can launch a career.
この大会は若手作家にとっての登竜門だ。
This competition is a gateway to success for young writers.
司法試験は
The bar exam is said to be the gateway to the legal profession.