日本語道場 — Nihongo Dojo

～とあって

~to atte

given that, being the case that

When to use it

Use ～とあって in written or formal spoken reporting to present a special circumstance and then the natural, almost inevitable consequence that follows from it. It is common in news writing, internal reports, and meeting summaries where you are describing a situation objectively rather than expressing your own will. The second clause must be an observed result — never a request, command, or statement of the speaker's own intention.

Formation

Verb: plain (dictionary) form + とあって — 出席するとあって
i-adjective: plain form + とあって — 反響が大きいとあって
na-adjective: stem + とあって (だ is dropped; ～であるとあって in stiffer prose) — 異例とあって
Noun: noun + とあって (no だ) — 繁忙期とあって
Past forms are possible (受注したとあって) but the plain non-past or a bare noun is by far the most common in reports.
The result clause is descriptive: 〜ている・〜た・〜ようだ. Avoid 〜てください／〜たい／〜つもりだ.

Examples

Given that it's the busy period before closing the books, the overtime keeps piling up.
With the president also attending, the venue was wrapped in tension.
Being last-minute demand ahead of the price hike, orders flooded in.
As it's the first loss since founding, the share price won't stop falling.
Now that the competitor has pulled out, inquiries are surging.