Wagyu beef is the beef that comes from the Japanese Wagyu cattle. It is very expensive and regarded as one of the best slices of beef. There is a lot of marbling in the meat, which means that there are streaks of fat within the red meat which makes the meat more tender and moist, while adding flavor. Sometimes the Wagyu beef is called different things based on where it is from. Some examples include Kobe beef, Matsusaka beef, or Omi beef.