Gunma(August,2003) We displayed fireworks at a hot spring resort in the mountains. As to 12" display shells were shot, the show was very powerful and worth seeing. Please see the attached picture. This is one of Japanese traditional way to shoot fireworks that is called HAYAUCHI in Japanese. We put a heated chain into a motar. Then, we drop the shell with lifting charge one after another into a mortar. display1 display2 preparation1 preparation2 preparation3 ▲Please click these pictures.