This is the 1882nd most frequent Japanese word.
班
"班" means "group," "team," or "section."
In this sentence, '班' is used to refer to a 'group' assigned for an activity, specifically a hiking team in a collective effort.
私たちの班は、午前に山の登山を始めました。
Our group started hiking the mountain in the morning.
Here, '班' signifies a 'team' or set of members within an organizational or hierarchical structure, such as a delegation in a conference.
班の代表者が会議で発言しました。
The representative of the team spoke at the meeting.
In this context, '班' denotes a 'team' designated to manage or oversee specific responsibilities.