The Makuuchi (幕内), or Makunouchi (幕ã®å†…), is the top division in professional Sumo wrestling in Japan. The division comprises just over 40 wrestlers who are ranked according to their ability, as defined by their performance in previous tournaments. At the top of the division are the "titleholders", or "champions" called the sanyaku comprising Yokozuna, Ozeki, Sekiwake and Komusubi.