noun
taking turns; in rotation
Describes doing something by turns among a group, often with a sense of sharing a responsibility or privilege in a circular order.
掃除当番は回り持ちで決めている。
We decide the cleaning duty by taking turns.
会議の司会を回り持ちで担当する。
We take turns chairing the meeting.
Compound of 回り (まわり, 'circulation, rotation') and 持ち (もち, 'holding, bearing'), literally 'holding in rotation'. The exact historical derivation is uncertain, but the word transparently describes a rotating turn-taking system.