first of all; to begin with; in the first place
Used to introduce the most important point or the first step in a sequence. Often appears at the beginning of a sentence or clause.
First of all, health is the most important thing.
To begin with, let's check the budget.
Standard mixed kanji-kana spelling; the most common written form.
Kanji spelling for まず is rare and literary; usually written in kana.
Combination of まず (first, to begin with) and 第一に (firstly, primarily). The phrase is a straightforward compound emphasizing the foremost point.