Folding fans used in a noh play, Kyō-sensu. Photo: Kuwajima Kaoru

The sensu or ōgi (folding fan) is an implement used to fan wind. It has been used in Japan by the nobility and monks as an accessory and a ceremonial item since the Heian period. Besides that, it also plays an important role in performing arts (such as Noh, Kyōgen, Rakugo and traditional Japanese dances) as well as in tea ceremony. Only folding fans whose entire production (including the making of the ribs, surface and finish) is done in Kyoto or its surrounding areas can be called Kyō-sensu or folding fans from Kyoto.