Carp streamers, known as koinobori in Japan, are colorful, decorative windsocks shaped like carp. Traditionally, they are flown on Children's Day (May 5) to celebrate the health and happiness of children. The carp symbolizes strength and perseverance, as it is believed to swim upstream against strong currents. These streamers are typically made from fabric or paper and come in various sizes and colors. Families often display them outside their homes, hanging them from poles or lines. The sight of carp streamers fluttering in the wind is a joyful representation of hope and aspiration for children’s futures.