Koinobori is a traditional Japanese custom that began in the Edo period (1603-1868). It is a streamer in the shape of a carp (“Koi” in Japanese), which is displayed in the yard to wish for the healthy growth of boys.
The reason for the carp’s shape is derived from a Chinese classic story in which the carp is regarded as a symbol of success in life.

Koinobori and Tokyo Tower
Koinobori are generally displayed from late March to early April, and are often put away after Children’s Day on May 5 (a national holiday to celebrate the healthy growth of boys. It is also called “Tango no sekku”).
During this period, there are many opportunities to see Koinoboris at various facilities.
