Japanese phrase
___人で参加します。 ___ nin de san ka shi ma su
Meaning
I will attend with ___ people.
When to use it
States how many people will join an event together. It is a polite, practical way to give a group size when registering or making plans.
Example dialogue
何人で参加しますか？ nan nin de san ka shi ma su ka
How many people will attend?
3人で参加します。 3 nin de san ka shi ma su
I will attend with three people.