at the same time; simultaneously; coinciding with
A formal, written expression used to describe two events happening at the same time or coinciding. Often used in news reports or formal statements.
新製品の発売と時を同じくして、大規模なキャンペーンが始まった。
A large-scale campaign began at the same time as the launch of the new product.
首相の訪米と時を
Trade negotiations were resumed coinciding with the prime minister's visit to the United States.
A fixed expression composed of 時 (time), を (object marker), 同じく (adverbial form of 同じ, 'same'), and して (form of する). Literally 'doing the same time', it has become a set phrase meaning 'at the same time' or 'coinciding with'.