Koinobori, meaning "carp streamer" in Japanese, are carp-shaped wind socks traditionally flown in Japan to celebrate Tango no Sekku (端午の節句?), a traditional calendrical event which is now designated a national holiday; Children’s Day. These wind socks are made by drawing carp patterns on paper, cloth or other nonwoven fabric. They are then allowed to flutter in the wind. – Wikipedia
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