We cannot translate it by a word. Depending on the sentence, we need to change it. Let’s see with example sentences. 一日ずつ いちにちずつichinichi zutsu どうぶつの森は、日にちを変えないで一日ずつやりましょう！doubutsunomori wa, hinichi wo kaenaide ichinichi zutsu yarimashou! You should play Animal Crossing day by day without changing the dates. 一日ずつ。(しっかりと生きて行こう！)ichinichi zutsu. (shikkarito ikiteikou!)*inside the parenthesis is an implication. One day …
