I wonder if they are  top division sumo wrestlers? Yokozuna  There are many ranks  for sumo wrestlers,  I saw it on NHK WORLD TV's  GRAND SUMO. It has a comprehensive collection of videos  that make it easy to learn about sumo wrestling. Japanese rice wine and  Japanese culture

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NHK WORLD is NHK's international broadcasting service, informing the world about the latest developments in Japan and Asia via TV, radio, and the internet.