～ずつ

The Japanese particle '～ずつ' (zutsu) is a versatile and common expression that indicates distribution, allotment, or progression 'each' or 'at a time.' It is typically attached to a quantity, a counter, or sometimes a noun, to specify how something is divided, given out, or happens incrementally. Understanding its nuances is crucial for expressing precise distribution in Japanese.

Core Meaning and Usage:

At its heart, '～ずつ' conveys the idea of 'each,' 'at a time,' or 'by increments of.' It signals that an action or state applies uniformly to individual units within a group, or that something is being done in a step-by-step fashion. This makes it invaluable for situations where you want to describe how things are distributed, consumed, or created over time.

Common Patterns:

1. 1Quantity/Counter + ずつ: This is the most frequent pattern. It specifies the amount or number given to each person, or the increment of an action.

• 三人ずつ (san-nin zutsu): Three people each / three at a time

• 一つずつ (hitotsu zutsu): One each / one at a time

• 毎日少しずつ (mainichi sukoshi zutsu): A little bit each day

• リンゴを二つずつ配った (ringo o futatsu zutsu kubatta): I distributed two apples each.

• この薬は一日三回、一錠ずつ飲んでください (kono kusuri wa ichi-nichi san-kai, ichi-jou zutsu nonde kudasai): Please take this medicine one tablet at a time, three times a day.

1. 1Noun + ずつ (less common but possible): While less common than with quantities, 'ずつ' can sometimes attach directly to certain nouns, particularly those implying a unit or category, to emphasize distribution among them.

• グループずつ発表してください (guruupu zutsu happyou shite kudasai): Please present group by group.

• 種類ずつ分けてください (shurui zutsu wakete kudasai): Please sort them by type.

Key Nuances and Contexts:

• Equal Distribution: '～ずつ' strongly implies an equal or consistent distribution. If the distribution is unequal, other phrasing would be more appropriate.

• Gradual Progression: It can also convey a sense of gradualness or steady progress, especially when combined with time expressions.

• 少しずつ日本語が上手になっています (sukoshi zutsu Nihongo ga jouzu ni natte imasu): My Japanese is gradually getting better.

• 貯金を少しずつ増やしています (chokin o sukoshi zutsu fuyashite imasu): I am gradually increasing my savings.

• Repetition/Iteration: '～ずつ' can highlight that an action is repeated for each item or unit.

• 一つずつ確認する (hitotsu zutsu kakunin suru): To confirm one by one.

• Emphasis on Individuality within a Group: It draws attention to the individual elements or increments rather than the group as a whole.

Comparison with similar expressions:

• ～ごと (goto): While both 'ずつ' and 'ごと' relate to distribution, 'ごと' often emphasizes 'every' or 'each complete unit.' For example, '一週間ごと' (isshuukan goto) means 'every week,' referring to entire weeks, whereas '一週間ずつ' (isshuukan zutsu) might imply 'a week at a time' or 'a week for each task.' 'ごと' tends to treat the unit as indivisible.

• ～に (ni) as a distributive marker: In some contexts, '～に' can also indicate distribution, but 'ずつ' is more explicit about the 'each' or 'at a time' aspect. For instance, '一人に一つ' (hitori ni hitotsu) means 'one for each person,' which is very similar to '一人ずつ一つ.' However, 'ずつ' often carries a stronger nuance of how things are being processed or allocated sequentially or incrementally.

Examples in Context:

• 子供たちにキャンディーを三個ずつあげた (kodomotachi ni kyandii o san-ko zutsu ageta): I gave three candies to each child.

• 宿題を毎日少しずつやる (shukudai o mainichi sukoshi zutsu yaru): I do my homework a little bit each day.

• この本は一ヶ月に一冊ずつ読みます (kono hon wa ikka-getsu ni issatsu zutsu yomimasu): I read one book a month.

• みんなでケーキを八つに分けて、一つずつ食べた (minna de keeki o yattsu ni wakete, hitotsu zutsu tabeta): We divided the cake into eight pieces and ate one piece each.

• 階段を一段ずつゆっくり上る (kaidan o ichi-dan zutsu yukkuri noboru): To slowly climb the stairs one step at a time.

In summary, '～ずつ' is an indispensable particle for accurately conveying distribution, gradual progression, and individual allocation in Japanese. Its consistent usage across various contexts makes it a fundamental part of expressing precise quantities and increments in everyday conversation and formal writing.