expression, pre-noun adjectival
(any) particular; special; worth mentioning
Used almost exclusively in negative sentences to mean 'no particular ...' or 'nothing special'. Functions as a pre-noun adjectival modifying a noun.
これといった理由はないけど、なんとなく行きたくない。
There's no particular reason, but I just don't feel like going.
彼にはこれといった特技がない。
He doesn't have any special skill worth mentioning.