Originally used to ward off evil spirits, fireworks (Hanabi) have a long history in Japan and are an integral part of Japanese summers. Hundreds of firework shows are held every year across the country, mainly during the summer holidays in July and August, with some of them drawing hundreds of thousands of spectators. On the other hand, fireworks are not typically used to celebrate New Year. Japanese firework shells range in size from smaller ones to the world record holding Yonshakudama shells which are 1.2 meter in diameter and weigh several hundred kilograms. The most common are starmines, which are spherical shells that have a variety of burst patterns. Other unique fireworks include Niagara sparklers that are set under bridges and resemble the famous waterfalls, and formed shells that burst into familiar shapes such as hearts, smiley faces and cartoon characters.