一度に（いちどに） means all at once; at the same time; in one go ~. It is a JLPT N3 grammar pattern used to express that multiple things happen simultaneously or that someone does everything in a single attempt.
This grammar point often appears in neutral Japanese. If you want to describe simultaneous actions or doing everything in one go, 一度に（いちどに） is a useful pattern to learn.
What does 一度に（いちどに） mean?
Use 一度に（いちどに） when you want to express that multiple things happen simultaneously or that someone does everything in a single attempt.
Natural translations include:
- all at once; at the same time ~
- all at once; at the same time; in one go ~
- all at once; at the same time
How to form 一度に（いちどに）
[Number + Counter] + 一度に / Verb + 一度に
Examples of the pattern:
- 一度に食べる
- 全部一度に
- 一度にできる
When is 一度に（いちどに） used?
Use 一度に（いちどに） in situations like:
- describing simultaneous events
- eating or drinking too much at once
- cramming
Tone and register:
- neutral
- Common in describing simultaneous events, test questions, and written narratives
一度に（いちどに） example sentences
- 一度に全部食べないで。 \u2014 Don’t eat it all at once.
- 一度に二つのことをしようとしないで。 \u2014 Don’t try to do two things at once.
- 一度に三冊の本を読んでいる。 \u2014 I’m reading three books at the same time.
- 一度にたくさん飲むと危険だ。 \u2014 Drinking a lot in one go is dangerous.
- 彼は一度に全部の仕事を終わらせた。 \u2014 He finished all the work at once.
Nuance of 一度に（いちどに）
The key nuance is often implies excess or impatience; can warn against cramming or rushing.
This matters because 〜一度に is neutral but often used in warnings. It highlights the risk or impressive nature of simultaneous actions..
For example:
- In describing simultaneous events, it sounds natural and specific.
- Compared with 同時に, it carries a different weight and implication.
一度に（いちどに） vs 同時に
Both 一度に（いちどに） and 同時に can express all at once, but they are different.
一度に（いちどに）:
- means all at once; can imply doing too much simultaneously
同時に:
- means at the same time; purely temporal, no judgment
Quick contrast examples:
- 同時に食べる。 \u2014 Eat at the same time (neutral).
- 一度に食べる。 \u2014 Eat all at once (potentially too much).
Common mistakes with 一度に（いちどに）
Watch out for these mistakes:
- Using it for sequential actions (use 順番に instead)
- Confusing it with 一度 (one time, formerly)
- Using it in contexts where individual steps are preferred
Is 一度に（いちどに） on the JLPT?
Yes. 一度に（いちどに） is commonly taught as JLPT N3 grammar.
That means learners should be able to:
- recognize it in reading
- understand its nuance in context
- use it in simple original sentences
Practice questions for 一度に（いちどに）
Try making your own sentences with these prompts:
- Say don’t try to do everything at once.
- Describe reading multiple books simultaneously.
- Warn someone against eating too much in one go.
Learn 一度に（いちどに） with Kanjiru
If you want to review 一度に（いちどに） together with kanji, vocabulary, and other JLPT N3 patterns, Kanjiru helps you practice Japanese in short, focused sessions.
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