〜に伴って

A に伴って B: event B happens accompanying, hand in hand with event A — A can be a major change (a typhoon, an earthquake, economic development) or an event that brings consequences with it (moving house entails address-change paperwork). This is a formal pattern, very common in news reports and documents: 台風に伴って、風も強くなるでしょう.

Connection: noun + に伴って; verbs add の: 引っ越すのに伴って. In stiff written style, に伴い replaces に伴って.

Comparison within the parallel-change group: につれて is used only for GRADUAL, step-by-step change; に伴って works both for gradual change and for one-time events with accompanying consequences. とともに and にしたがって sit between those two extremes. In everyday conversation, Japanese speakers lean toward につれて or とともに; に伴って sounds very much like a news broadcast.

Examples

• 台風(たいふう)に伴(ともな)って、風(かぜ)も強(つよ)くなるでしょう。

  Along with the typhoon, the wind will likely grow stronger too.

• 経済(けいざい)の発展(はってん)に伴(ともな)って、人々(ひとびと)の生活(せいかつ)も豊(ゆた)かになりました。

  Hand in hand with economic development, people's lives have become more prosperous.

• 引(ひ)っ越(こ)しに伴(ともな)って、住所変更(じゅうしょへんこう)の手続(てつづ)きをしました。

  Along with moving house, I completed the paperwork to change my address.

Related patterns

• 〜につれて
• 〜とともに
• 〜にしたがって