InitialJ
N1formaldecidedN1

～こととなる (koto to naru) - It has been decided that

[Verb plain form] + こととなる/こととなった

Quick answer

[Verb plain form] + こととなる/こととなった means "It has been decided/arranged that; It came about that". This N1 pattern appears often in everyday conversation. Examples and practice exercises are listed below.

Meaning

It has been decided/arranged that; It came about that

Explanation

A formal expression indicating that something has been decided or came to happen, often used in business/official contexts.

Examples

来月、海外支社に赴任することとなりました。
らいげつ、かいがいししゃにふにんすることとなりました。
It has been decided that I will be posted to the overseas branch next month.
来—Coming海—Sea外—another place赴—Go
このプロジェクトを担当することとなり、身が引き締まります。
このぷろじぇくとをたんとうすることとなり、みがひきしまります。
Having been assigned this project, I feel a sense of responsibility.
担—Bear身—Body締—Tie

Practice this grammar

[Verb plain form] + こととなる/こととなった

Which sentence correctly uses "～こととなる (koto to naru) - It has been decided that"?

Vocabulary from these examples

担BearN2締TieN1赴GoN1外another place海Sea来Coming身Body来next ~外Outside

Last updated Jul 4, 2026