Fireworks in Japan have a long and interesting history. These are some of the facts I have found quite fascinating when it comes to this ancient culture and the use of pyrotechnics.
 In the 17th century, feudal lords enjoyed boat rides that featured fireworks as entertainment. Around this time, an epidemic of cholera broke out and the sitting Shogun, Yoshimune, ordered a huge firework display to console the spirits of those who had died. This firework event started a tradition of pyrotechnics on the Sumida River.
On February 11, 1889 there was another large firework display that has been recorded in the annals of time. On this day, the imperial constitution of Japan was proclaimed, and in honor, a large festival was held in Tokyo that included a massive fireworks display was set off in front of the Imperial Palace.
Today in Japan, spectators shout Tamaya!… Kagiya! during fireworks displays. These are the family names of two renowned pyrotechnicians who were instrumental in the development of fireworks in Japan. Kagiya was part of the first Ryogoku river festival in 1733 and set off 20 bursts that were so dazzling he became famous. Tamaya began as Kagiya’s apprentice, but later the two would compete against each other for 32 years. Unfortunately, this Tamaya accidentally causes a firework fire in the mid-19th century that destroyed a good deal of the city and got him kicked out as well.