Tuna is a popular fish species that can be found on many menus. The firm texture, rich flavor, and many preparation possibilities make this fish beloved. Saku are pre-cut rectangular blocks of tuna that are cut from the back loin of the tuna. Often, Saku is used for sushi or sashimi because you can cut perfect slices from it, but it can also be a good addition to, for example, poke bowls. Because the Saku is pre-cut, you have lower labor costs and less cutting waste.