noun
junior class; younger group
Used in contexts like schools, clubs, or organizations to refer to a group of younger or less experienced members, often contrasted with 年長組 (senior class).
幼稚園では年少組の子どもたちが歌の練習をしていた。
At the kindergarten, the children in the junior class were practicing singing.
サークルの年少組
The younger group in the club is still not used to the activities.