なんといったって

expression

no matter what; after all; in the end

Emphasizes that a statement holds true regardless of circumstances or objections. Often used to reinforce a reason or conclusion. Colloquial.

See also: なんてったって

• なんといったって、彼かれはまだ子こ供どもだから、そんな責せき任にんは負おえないよ。

  No matter what you say, he's still a child, so he can't take on that kind of responsibility.

• なんといったって、ここが一いち番ばん落おち着つく。

  After all, this is the most relaxing place.