Rehabilitation nutritional care involves setting rehabilitation nutrition goals, 1-3 including both rehabilitation and nutrition goals. Rehabilitation goals often encompass improvements in functions including body function and structure, activity, and participation. Nutrition goals, on the contrary, include improvements in not only body weight, muscle mass, and body fat but also muscle strength, physical function, swallowing function, activities of daily living (ADL), quality of life (QOL), and participation. The most important of these nutrition goals are improving function and QOL. However, at present, setting nutrition goals by body weight makes it easier to calculate daily energy requirements. Therefore, in this position paper, we clarified our position, as the Japanese Association of Rehabilitation Nutrition, on the existing knowledge of how to set body weight goals.