expression
Used as a prenominal modifier meaning 'that kind of' or 'such'. Similar to そういう, but slightly more formal or written. Often used to refer to a previously mentioned type or category.
See also: そういう
そういった問題は初めて聞きました。
This is the first time I've heard of that kind of problem.
そういった理由で、参加できません。
For that sort of reason, I cannot participate.