noun
being on duty together; working the same shift
Refers to the situation of being on duty or working a shift alongside a colleague, often in contexts like security, reception, or monitoring.
今夜は山田さんと相番です。
Tonight I'm on duty with Mr. Yamada.
noun
duty partner; shift colleague
The person with whom one shares a duty or shift; a colleague specifically in the context of being on duty together.
相番の田中さんが急に休んだので、一人で対応した。
My shift partner, Tanaka, suddenly took the day off, so I handled things alone.