Thought you might find this interesting
The change of dietary habits and the resultant changes in health of Japanese children
The article discusses the changes in dietary intake for 6 year old japanese girls from 1954 to 1994.
Carbohydrate intake has decreased from 73% to 53%
Fat intake has risen from 14% to 32%
calorie intake rose to a high of 1884 Kcal in 1971 and has decreased to 1627 Kcal by 1994.
The article recommends that japanese children should INCREASE their carbohydrate intake.