The Sumidagawa Fireworks Festival
(隅田川花火大会, Sumidagawa Hanabi Taikai) is an annual fireworks festival held on the last Saturday in July, over the Sumidagawa near Asakusa.

Unlike fireworks displays in other parts of the world, the Sumidagawa Hanabi Taikai, and other fireworks events in Japan, is a competition held between rival pyrotechnic groups. Each group tries to out-do the last, and the result is an incredible variety of fireworks, not just in different colors and patterns, but forming shapes as complicated as Doraemon, Pikachu, or kanji.

It is a revival of celebrations held in the Edo period, and annually attracts close to a million celebrants. Similar events are held at the same time of year at many other sites throughout Japan.

Here's some of the fireworks photo that i found:

and a short video of this year's Sumidagawa Fireworks in Japan =D
Enjoy~ XD