This phrase means 'even if you suppose that...' or 'even if you grant that...'. You use it to say that something is true, no matter what.
Clause [plain form] + としたってPrimary
This phrase means 'even if you suppose that...' or 'even if you grant that...'. You use it to say that something is true, no matter what.
今から頑張るんだとしたって、もう間に合わないよ。
Even if you say you'll start trying hard from now, you won't make it in time.
百歩譲ってそれが事実だとしたって、彼の行動は許されない。
Even if we concede a hundred steps and assume that's a fact, his actions are unforgivable.
あの時正直に話していたとしたって、結果は変わらなかっただろう。
Even if I had spoken honestly back then, the result probably wouldn't have changed.
子供がやったことだとしたって、親には監督責任がある。
Even if it was something a child did, the parents have a supervisory responsibility.
彼が犯人じゃないとしたって、アリバイがないのはおかしい。
Even granting that he isn't the culprit, it's strange that he doesn't have an alibi.
This word adds a strong feeling to your sentence. It's like saying, 'Even if you think that, my idea is still true.' It shows you are very sure about what you say.
This is like 〜としても. Both mean 'even if'. But 〜としたって is more common when speaking. It is different from 〜としたところで. Both talk about 'even if' ideas. But 〜としたところで means the result will be bad or useless. 〜としたって is more neutral. It just means the result does not change. For example, you can say 'Even if it's expensive, I want it' with 〜としたって. You cannot use 〜としたところで for this idea.
Don't use this when you are giving an order. For example, you cannot say "Even if it rains, please come." The second part must be a fact or an opinion.
Less formal alternatives(2)
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