Uchiwa is a traditional Japanese fan. It is round and has a long handle. The frame is made of bamboo or plastic and covered with paper.
Uchiwa is used for fanning oneself to keep cool in summer. It is used for fanning other things, too. For example, when making sushi, it is useful to cool and remove the moisture of the rice.
Uchiwa are so commonly used that many businesses use them as an advertisement medium. They distribute uchiwa with their names on them for free in the streets or at festival venues.