Hanami

 The cherrytree's flower or sakura is the national flower in japan and the symbol of Tokyo but the favorite flower in Japan. The Japanese Cherry trees bloom in spring not more than for four or five days !That's why an event like Hanami exists ; it's a party when Japanese people eat under the cherrytree to look at the "sakura".
It is a very important event in the year and every year during the hanami the Ueno's park ( the most important park in Tokyo) is packed !!!

Hanami signifies see the flowers.