線香花火 – Senkō Sparkler
One type of firework that has been used in Japan since the Edo period is called “senkō sparkler”; probably the smallest sparkler in Japan. In the Tokyo area, a senkō sparkler is made out of twisted Japanese paper (washi) with a small amount of gunpowder wrapped inside at one end. Because it is made out of paper, a senkō sparkler is very fragile. You have to stay very still after you light it, otherwise, the firework will break off from the paper and die. Unlike the common image of fireworks, the senkō sparkler is tiny and fragile. Yet many Japanese people love senkō sparklers precisely because of this uniqueness.
You can watch a video of senkō sparkler here.