と同時に
🃏 Flashcard
と同時に
to douji ni
Tap to reveal usage
at the same time as; while
N2
Tap to test your recall · +10 XP
📊 Pattern Stats
JLPT Level
N2
Upper-Intermediate · Academic & formal usage
Reading
to douji ni
Post ID
51159
Patterns today
0
0 / 10 daily goal
📝 Usage Notes
at the same time as; while
📖 How to use it
Expresses that two actions or states happen at the same time, or that something has two aspects simultaneously.
Attaches to
Attaches to the dictionary form of verbs, the plain past form of verbs (for simultaneous states), and directly to nouns (with no particle) or the stem of な-adjectives.
と同時に means 'at the same time as' or 'while'. It links two events that occur simultaneously, or describes a single subject having two simultaneous qualities or roles. When used with a verb, it often indicates that one action is done while another is also true or happening. With nouns or な-adjectives, it emphasizes that something has two aspects at once, like 'being X and also Y'. It is a moderately formal connective, often used in written Japanese, news, and formal speech, but also acceptable in everyday conversation when you want to be precise.
彼は驚くと同時に、うれしくも思った。
Kare wa odoroku to douji ni, ureshiku mo omotta.
At the same time as being surprised, he also felt happy.
このスマホは軽いと同時に、バッテリーの持ちもいい。
Kono sumaho wa karui to douji ni, batterii no mochi mo ii.
This smartphone is light, and at the same time, the battery life is good.
彼女は教師であると同時に、小説家でもある。
Kanojo wa kyoushi de aru to douji ni, shousetsuka demo aru.
She is a teacher and at the same time a novelist.
Not ながら
ながら attaches to the ます-stem of a verb and means 'while doing' (same subject, same time). と同時に can connect two different subjects or states and is more formal. For example, '音楽を聴きながら勉強する' means you do both at once, but '彼が入ってくると同時に、私は立ち上がった' means two events coincide, not that you do both.
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Neutral to formal; common in written language and polite speech, but not as casual as ながら.
🎯 Quick Quiz
What does this grammar pattern mean or do?
と同時に
📚 How to Master This Pattern
Say It Aloud
Press Hear it and repeat と同時に three times. Feel the rhythm — grammar patterns have a natural flow.
Flip Before Reading
Always try to recall the usage before flipping the card. Struggle = learning. Every failed recall makes the next one stick harder.
Write Two Sentences
Compose two original sentences using と同時に. One about yourself, one about something you see right now.
Spaced Review
Save this pattern and revisit at 10 min, 1 day, 3 days. Production (writing) beats recognition for grammar.
🔗 More JLPT N2 Patterns
❓ Frequently Asked Questions
What does the grammar pattern と同時に mean?
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At the same time as; while
What JLPT level is と同時に?
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Nihoner currently groups this pattern under JLPT N2 — Upper-Intermediate · Academic & formal usage. Use the level label as study guidance rather than a prediction of what will appear on an exam.
How do you use と同時に in a sentence?
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Attach と同時に (to douji ni) to the appropriate verb or noun form as described in the usage notes. Then try writing two original sentences — one about yourself and one about something around you.
Is と同時に formal or casual Japanese?
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と同時に is used in formal or written contexts. You will see it mainly in written texts, news, business Japanese and academic contexts.
How can I remember と同時に long-term?
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Use the flashcard on this page for active recall — see the pattern, reconstruct the usage from memory, then flip. Follow with the 4-choice quiz to distinguish it from similar patterns. Review later the same day and again over the following days. Writing original sentences can help you practise using the pattern in context.