fireworks display; fireworks festival
Refers to a large-scale public event where many fireworks are launched, typically in summer. Often implies a festive atmosphere with food stalls and crowds.
In summer, fireworks displays are held in various places.
I'm looking forward to going to the fireworks festival wearing a yukata.
A fireworks display is held on the Sumida River every year.
I'm planning to go to the fireworks festival with a friend.
I wore a yukata and went to watch the fireworks festival.
The fireworks from the festival went up one after another into the night sky.
夏祭り is a broader summer festival with games, food stalls, and dancing, whereas 花火大会 centers specifically on a fireworks show, though the two often happen together.
花火 refers to the physical fireworks or the act of setting them off, while 花火大会 is the organized public event where many are launched together.
Compound of 花火 (fireworks) and 大会 (large gathering, convention). The word straightforwardly means 'fireworks event'.