a small group, party, or team (e.g., classroom group or work team); also used as a suffix
掃除は四つの班に分かれて交代で行っています。
Cleaning is done in rotation by four teams.
遠足では班ごとに行動して、班長がまとめることになっている。
On the excursion, students act by group, and the group leader organizes them.
プロジェクトは五人の班で進められる予定だ。
The project is planned to proceed with a team of five people.
a squad or section (military) — a small unit within armed forces
陸軍の班長が作戦の指示を出した。
The army squad leader gave the instructions for the operation.
演習では各班が別々の役割を担当した。
In the exercise, each squad was responsible for different roles.