even if; even supposing that
Used after a clause, often in the form 〜たとしても or 〜としても, to introduce a hypothetical condition that would not change the main result.
雨が降ったとしても、試合は行われます。
Even if it rains, the game will be held.
今から出たとしても、間に合わないだろう。
Even if we leave now, we probably won't make it in time.
also as; also for; from the position of
Used after a noun or pronoun as Nとしても, meaning 'also as N' or 'from N's side/standpoint too.' With pronouns such as 私としても, it often means 'for my part too.'
彼女は翻訳者としても有名だ。
She is also famous as a translator.
For my part too, I would like to cooperate as much as possible.
ても is the general 'even if/though' connective attached directly to verbs and adjectives, whereas としても is used after a clause or noun to mean 'even supposing that' or 'also as.'
にしても also means 'even if/even as' but attaches differently and often carries a more evaluative or critical tone than としても.
としても expresses 'even if/even as' in a slightly more neutral, written register, while ところで carries a stronger nuance of futility about the outcome.
A grammatical expression built from として, related to とする 'to regard as; to suppose,' plus も 'also; even.' The combination has developed the two main uses 'even supposing that' and 'also as/from the standpoint of.'