Seasoning your hibachi grill is very important due to the removal of the residue of chemicals from the manufacturing plant. If you cook without seasoning, you will end up with different flavored foods. Seasoning the hibachi grill is a must-follow procedure because of the cast-iron grilling surface.nnYou have to start by putting a light coating of olive or food-grade mineral oil over the cast-iron cooking surface. Once done, start the hibachi grill and let the temperature to consistent for one hour at 350° F. After the heating process, let your grill cool up completely.