also: にかんしちゃ
expression
regarding; concerning; about; with respect to
A formal or written expression used to introduce a topic. Often followed by a noun or noun phrase. In casual speech, について is more common.
この問題に関して、ご意見をお聞かせください。
Regarding this issue, please let us know your opinion.
環境問題に関しての会議が開かれた。
A meeting was held concerning environmental issues.
Compound of the particle に, the verb 関する (to relate to), and the conjunctive particle て. Literally 'relating to'.