〜としたら
Formation
Meaning
If we assume that... / If ... were to actually happen. Used to talk about hypothetical situations and their consequences.
Examples
明日、世界が終わるとしたら何をしますか？
If the world were to end tomorrow, what would you do?
一億円宝くじに当たったとしたら、家を買いたい。
If I were to win 100 million yen in the lottery, I'd want to buy a house.
その話が本当だとしたら、驚きだ。
If that story were to be true, it would be a surprise.
もし、テストが難しいとしたら、合格者は少ないはずだ。
If the test were to be difficult, there should be few people who pass.
もし彼が本当に親切だとしたら、断るのは悪い気がする。
If he were actually kind, I'd feel bad about refusing.
その方法が不便だとしたら、別のやり方を考えよう。
If that method were inconvenient, let's think of another way.
あの人が犯人だとしたら、とても信じられない。
If that person were the culprit, I really couldn't believe it.
明日が雨だとしたら、ピクニックは中止ですね。
If it rains tomorrow, the picnic will be cancelled, won't it?