とうばん当番touban
1.

A designated role or responsibility assigned to an individual, often involving specific tasks or duties that one performs in succession with others.

2.

The condition of being scheduled to perform work or responsibilities, particularly in settings that require rotation, such as overnight shifts or emergency services.

Example:

先月の日直当番全部私に押し付けた形でエスケープした野郎だ。

そうじとうばん掃除当番soujitouban
1.

The designated responsibility assigned to an individual for performing cleaning duties during a specific time period or on a certain day.

2.

A rotating duty where each member of a group takes turns managing the cleaning tasks, ensuring that the shared space remains tidy and presentable.

3.

The scheduled obligation to maintain cleanliness, typically within a household or communal environment, reflecting a shared commitment to hygiene and order.

とうばんへい当番兵toubanhei
1.

A soldier assigned to assist and attend to the needs of an officer, often carrying out various administrative and logistical tasks.

2.

A military role focused on providing support and maintaining the organization of an officer’s duties, similar to a personal aide but specifically within a military context.

3.

A designated individual responsible for guarding and overseeing the security of a particular area, often serving under the direction of a commanding officer.