noun
matching the number of people; making up the numbers
Used when adjusting the number of participants to meet a requirement, such as forming teams or filling seats. Often implies adding people just to reach a target count.
チーム分けのために人数合わせをした。
We adjusted the number of people to form teams.
彼は人数合わせで呼ばれただけだ。
He was only invited to make up the numbers.