At a glance
～となると means "if it comes to ~" or "when it comes to ~". It introduces a situation that has become real, has been decided, or is being considered, and then states what that situation means.
[Verb plain form] + となると
[Noun] + となると
留学するとなると、お金がかかります。 If you're going to study abroad, it will cost money.
How to form it
となると attaches to the plain form of a verb or directly to a noun:
| Attaches to | Example | Meaning |
|---|---|---|
| Verb (dictionary form) | 留学するとなると | if (I) am going to study abroad |
| Verb (ない form) | 行かないとなると | if (we) are not going |
| Verb (た form) | 決まったとなると | now that it has been decided |
| Noun | 試験となると | when it comes to exams |
Register: となると itself is neutral. It is used in both speech and writing, and the end of the sentence sets the politeness level. Do not put polite forms (～ます) before it.