One of the calculation methods of the future food consumption pattern was developed. A n dimensional pattern vector was thought to exist and move on the surface of the unit sphere in n dimensional space. A calculation method was studied on the next 2 assumptions, (1) a pattern moves on a straight line in the sphere surface, (2) infinite time is necessary to move from a boundary to another boundary of the first quadrant area. Firstly, a locus of pattern moving is expressed as vectors using a vector OP in which OA represents the present pattern, OB represents the past pattern and OP is a vector which has a right angle with vector OA. Secondly, the position of a future pattern is decided using the distance (radian) from the starting boundary point, according to the logistic curve equation, in which y is a distance from the starting point, t is a time and K, ao and a1 are parameters. In this study, the distance from the starting point to the targent point is used as the K value.
Future changes of the calorie supply pattern composed of proteins, fats and carbohydrates in Japan were estimated using the forecast calculation method reported in the previous report. Data obtained were 13.0% from proteins, 23.7% from fats and 63.3% from carbohydrates in 1975, whereas 12.8%, 27.6% and 59.6% in the items in 1980, respectively. Supposing that recent changes of eating life in Japan continue in future, the calorie supply pattern will become the point considered not good for health in 1977, because the percentage of the calorie from fats will reach over 25%.