1
at (a time or place);in;on
古代において塩は希少で貴重な商品であった。
Salt was a rare and costly commodity in ancient times.
2
in (a situation, matter, etc.);on (a point);when it comes to;regarding;with respect to;in (terms of);as to;as for
英語は商業において役に立つ。
English is useful in commerce.
3
on the part of;under the authority of;in the name of
Other forms
に於て 【において】 (rarely used kanji form)