333 Koinobori (carp banners) are seen outside Tokyo Tower on April 20, 2019, Tokyo, Japan. Tokyo Tower is celebrating Children’s Day displaying 333 carp-shaped Koinobori from March 29 to May 6. Every year, families with boys decorated their houses with Koinobori streamers to celebrate healthy growth and well-being of children. Children’s Day is celebrated on May 5 every year in Japan.