～に伴って

How to form it

• Noun / Verb (dictionary form) + に伴って / に伴い
• Noun + に伴う + noun

Register: Formal, written

Explanation

Says that something happens or changes together with another development. The second part is a related change, result or event.

Common in reports about society, economy and technology. The first part is usually a change or development.

Examples

1. 人口の増加に伴って、交通渋滞も増えた。

   じんこうのぞうかにともなって、こうつうじゅうたいもふえた。

   As the population grew, traffic jams also increased.

2. 技術の進歩に伴い、生活が便利になった。

   ぎじゅつのしんぽにともない、せいかつがべんりになった。

   With technological progress, life became more convenient.

3. 台風の接近に伴って、雨が強くなってきた。

   たいふうのせっきんにともなって、あめがつよくなってきた。

   As the typhoon approached, the rain grew heavier.

Compare with

• ～につれて: につれて is more common in speech; に伴って is more formal and written.
• ～とともに: とともに also means 'together with', in addition to 'as ... changes'.

Common mistakes

• Using it for sudden changes that are unrelated to each other.