How to say "firstly" in Japanese

• まずJLPT N4approx.Common
  adverbCovers 'firstly' as in starting with the most immediate action before anything else. It carries a practical, step-by-step nuance, as in giving instructions or outlining what to do first.
  まず第だい一いちに私はジムを訪たずねなければならない。↗

  First of all, I have to call on Jim.
• はじめにJLPT N2approx.Common
  expressionCovers 'firstly' as an opener announcing the first item or point, typical when beginning a speech, presentation, or written text. It frames what follows as the start of an orderly sequence.
  いいえ、はじめに９番ばんにおかけ下ください。↗

  No, please dial nine first.

Both words work for the enumerating sense of 'firstly' to introduce a first point; choose 「まず」 when emphasizing doing something before anything else, and 「はじめに」 when formally beginning a talk or document.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• まずfirst (of all)
• はじめにfirst