〜となると
Formation
Meaning
Used to express an opinion or evaluation about a hypothetical situation. It suggests that if 'X' were to happen, the situation or one's judgment would change accordingly.
Note
Indicates a shift in perspective or a change in evaluation based on a specific situation becoming real.
Examples
引っ越すとなると、いろいろ準備が大変だ。
If it comes to moving, various preparations will be difficult.
一から作り直すとなったら、かなりの時間がかかるだろう。
If it were to be remade from scratch, it would probably take a considerable amount of time.
物価が高いとなると、生活が苦しくなる。
If prices are high, life will become difficult.
これ以上安くないとなれば、他の店で買うしかない。
If it doesn't get any cheaper than this, there's no choice but to buy at another shop.
操作が複雑だとなると、使いこなすのは難しい。
If the operation is complicated, it might be difficult to master.
交通が不便だとなれば、車を買う必要がある。
If transport is inconvenient, it is necessary to buy a car.
彼が犯人だとなると、話は違ってくる。
If it turns out that he is the culprit, the story changes.
明日が雨だとなったら、イベントは中止になるだろう。
If it turns out that it rains tomorrow, the event will likely be cancelled.