同時(どうじ)に

どうじに
adverb
at the same time; simultaneously; also
time-generalgrammatical
1. at the same time; simultaneously
Two or more events happening at the same moment or in parallel.
二人(ふたり)が同時(どうじ)に立(た)った。
The two stood up at the same time.
電話(でんわ)と来客(らいきゃく)が同時(どうじ)に来(き)た。
A phone call and a visitor came at the same time.
音楽(おんがく)を聴(き)くのと同時(どうじ)に勉強(べんきょう)するのは難(むずか)しい。
It's hard to study and listen to music at the same time.
2. at the same time; also; as well
Used to add another characteristic or aspect, meaning 'and also' or 'while being.'
彼(かれ)は教師(きょうし)であると同時(どうじ)に作家(さっか)でもある。
He is a teacher and at the same time a writer.
この問題(もんだい)は難(むずか)しいと同時(どうじ)に面白(おもしろ)い。
This problem is difficult and at the same time interesting.
彼女(かのじょ)は優(やさ)しいと同時(どうじ)に厳(きび)しい面(めん)もある。
She is kind but at the same time has a strict side too.

A versatile adverbial expression with two main uses. In its literal sense, it describes simultaneous events. In its connective sense (Aと同時(どうじ)にB), it links two coexisting qualities or facts about the same subject, similar to English 'while also being.'

Common patterns

  • Verb dictionary form + と同時(どうじ)に: at the same time as doing
  • Noun/adjective + であると同時(どうじ)に: while also being

Common collocations

Similar words

  • 一斉(いっせい)に: all at once — emphasizes everyone doing something together, not two parallel events
  • 併(あわ)せて: together with; at the same time — more formal, often used in written or business contexts

Related Words

Compare: 一斉(いっせい)に (all at once)
Compare: 一斉(いっせい) (all at once, simultaneously)
Compare: かつ (and, moreover, at the same time)
general
Added 2026.4.6 0:13 · Revised 2026.9.2 13:02
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