にあたり・にあたって

JLPT Level: N2
Meanings

when

on the occasion of

at the time

as ... happens

Usage

Noun + にあたり

Noun + にあたって

Verb (dictionary form) + にあたり

Verb (dictionary form) + にあたっては (formal conditional nuance)

Explanation
This grammar is used for formal or official situations to indicate a notable moment when something happens or a plan or action is undertaken. It emphasizes consequences, responsibilities, or actions tied to that particular moment. Commonly found in announcements, speeches, letters, and official documents. The form with にあたり is more formal/ceremonial, while にあたって is slightly more general but still polite; both are often used with verbs in dictionary form (e.g., start, undertake, prepare) or with nouns to mark the occasion. Note that it marks a turning point or a context in which something is decided or announced rather than describing a routine event.
就任にあたり、皆様のご支援に深く感謝申し上げます。
しゅうにんにあたり、みなさまのごしえんにふかくかんしゃもうしあげます。

On taking office, I would like to express my deep gratitude for everyone's support.

引っ越しにあたり、住所変更の案内をお送りしました。
ひっこしにあたり、じゅうしょへんこうのあんないをおおくりしました。

On moving, we sent out changes of address notices.

創業にあたり、これまでのご愛顧に心から感謝します。
そうぎょうにあたり、これまでのごあいこにこころからかんしゃします。

As we start the business, we sincerely thank you for your past patronage.

結婚にあたって、二人で新しい生活を始める決意を語った。
けっこんにあたって、ふたりであたらしいせいかつをはじめるけついをかたった。

At the time of getting married, the couple spoke about starting a new life together.