〜と同時に

Pattern
〜と同時に
Level
N4
Reading
〜とどうじに
Meaning
at the same time as; while; concurrently with
Attaches to
Verb dictionary form + と同時に; Noun + と同時に
Nuance & register

Used for emphasizing simultaneity or duality of states/actions or attributes. Can be used for unexpected combinations.

Example

彼は会社員であると同時に学生です。ベルが鳴ると同時にドアが開いた。

Easily confused with

〜ながら - 〜と同時に implies two events/states happening concurrently or simultaneously, often emphasizing a duality, while 〜ながら specifically describes two actions performed by the same subject at the same time.

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