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1 sport governed by this organization
2026 Nihon Sumo Kyokai Regulations — Japanese professional sumo; six annual 15-day basho tournaments under strict ranked hierarchy (yokozuna apex)
Professional Sumo (大相撲, ōzumō) is Japan's national sport, governed by the Nihon Sumo Kyokai (Japan Sumo Association, founded 1925) as the sole professional sumo authority worldwide. Sumo wrestlers (rikishi) compete in six annual 15-day tournaments (basho): January (Tokyo), March (Osaka), May (Tok...
