Carp streamers (koinobori banners) are flown on Children's Day in Japan, a national holiday. The holiday was originally a celebration of boys and is still sometimes referred to as "Boy's Day." Boys and girls are now celebrated on Children's day. A carp is a type of fish that typically swims and feeds at the bottom of a body of water. The largest carp (fish) streamer is meant to symbolize the father, the medium carp the mother, and any smaller carp the number of children in the household. A celebration held on May 5th for children and those that take care of children.
Emoji History The emoji code/ image log of changes.
This emoji was part of the proprietary / non-standardized emoji set first introduced by Japanese carriers like Softbank. These emojis became part of the Apple iPhone starting in iOS 2.2 as an unlockable feature on handsets sold in English speaking countries.
In iOS 5 / OSX 10.7, the underlying code that the Apple OS generates for this emoji was changed.