!One of the most beautiful things in the world have I ever seen!
Koinobori(鯉幟?), 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.
They are also known as satsuki-nobori (皐幟?).
Children's Day takes place on May 5. Landscapes across Japan are decorated with koinobori from April to early May, in honor of sons and in the hope that they will grow up healthy and strong. - Wikipedia
Pics are chosen from Flickr and I cant help copy them without any credit. Thanks photographers for their talent and sharing.