N1 Cause, Reason, and Basis

~こともあって: meaning, usage and examples

~こともあって means: partly because...

Updated 9 November 2026 · By the My Senpai team · Spotted a mistake? Tell us

Examples

1. 久ひさしぶりに会あったこともあって、話はなしが尽つきなかった。

   Partly because we hadn't met in a long time, we had endless things to talk about.

2. 雨あめが降ふってきたこともあって、客足きゃくあしが遠とおのいた。

   Partly because it started raining, the number of customers dwindled.

3. 週末しゅうまつだったこともあって、駅前えきまえはいつもより混こんでいた。

   Partly because it was the weekend, the area around the station was busier than usual.

4. 円えん安やすが進すすんだこともあって、海外かいがいからの観光かんこう客きゃくが増ふえている。

   Partly because of the weaker yen, more tourists are coming from abroad.

When to use it

Gives one reason among several, "partly because" or "also because." The speaker suggests that other factors contributed too. Example: 週末しゅうまつだったこともあって、店みせは混こんでいた (the shop was crowded, partly because it was the weekend). It usually explains a situation that has already happened.

Nuance

Neutral to slightly formal, used in news, reports and careful speech. The result is usually a fact, not the speaker's request or intention. It softens the cause, so it sounds less blunt than から or ので and leaves room for other reasons.

Compare

ので presents one clear reason: 週末しゅうまつなので混こんでいた. こともあって says "this was one factor": 週末しゅうまつだったこともあって混こんでいた. とあって points to a special situation that naturally produces a reaction: 連休れんきゅうとあって、どこも混雑こんざつしている.

Tip: The も is the key: it means "also." If you want to suggest other causes without naming them, こともあって is the polite choice.