Three representative Japanese diets composed of typical menus were prepared and cooked in the laboratory kitchen. The average contents of α-tocopherol, non-α-tocopherol and polyunsaturated fatty acids of the diets (per day) were 5.0mg, 8.3mg and 10.5g by calculation, and 5.2mg, 7.0mg and 12.4g by determination, respectively.