BETA SAÚDE
Dohyō
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A dohyō is the ring in which a sumo wrestling bout occurs. A typical dohyō is a circle 4.55 m (15 ft) in diameter, bounded by partially buried rice-straw bales. In official professional tournaments (honbasho), it is mounted on a square platform of clay 34–60 cm (13–24 in) high and 6.7 m (22 ft) wide on each side.