[verb た-form] + ところで
[noun] + にしたところで [noun] + としたところで
[verb て-form] + みたところで
The grammar patterns にしたところで and としたところで express the meaning of "even if," "even supposing that," or "even granted that." They are used to acknowledge a hypothetical situation or concession, only to assert that the outcome or conclusion would not change regardless. The speaker emphasizes that even under the best or most favorable interpretation of a condition, the result remains the same – typically negative or insignificant.
The pattern attaches to the た-form of a verb (often する) and is followed by a clause stating that the result is still unsatisfactory or unchanged.
Both forms are largely interchangeable, but there is a subtle difference in nuance:
~にしたところで often takes a noun (typically a person) as the topic, meaning "even for (that person)" or "even from (that person's) perspective."
~としたところで tends to emphasize a hypothetical supposition – "even if we suppose that..."