In professional sumo wrestling, the wooden clapper used before bouts is called hyōshigi.
Hyōshigi are paired wooden blocks struck together to create a sharp, distinctive sound. In sumo venues, the sound helps announce and punctuate the progression of the day’s program, especially as bouts and ceremonial activities move forward.
The term refers to the instrument rather than to a wrestler’s movement or a match official. The referee’s fan is called a gunbai, while shikiri describes the pre-bout preparation performed by wrestlers.
Traditional Japanese performing arts also use related wooden clappers, so hyōshigi are not exclusive to sumo. Their recognizable sound is nevertheless closely associated with the formal atmosphere of a professional tournament.