opposite team in a two-turn work group
Used in contexts where work is divided into two alternating shifts or teams; refers to the team that is not currently on duty.
今日は反対番が作業を担当する。
Today the opposite team is in charge of the work.
反対番と引き継ぎを行う。
We hand over to the opposite team.
Compound of 反対 (opposite) and 番 (turn, shift). The exact historical derivation is uncertain, but the term is used in specific work-group contexts.