Height, nutrition and the side production of sericulture and carp feeding in modern rural Japan (1) aggregate data analysis : the case of Zakouji-village, Shimo-Ina gun, Nagano, 1880s-1930s

Our fact findings of the paper on height growth of primary students are as following;1: The average heightsof all grades of the Zakouji students borne at 1912 1914 and 1918 1920 clearly declined due to the @economic damage of lower local cocoon prices ;2: The Peak Height Velocity analysis shows the level of 1912 14 birth cohort declined from 5.64 to 4.72 comparing with the previous cohort, but at the next cohort the level soon returned to the almost same one; 3: Comparing height growth speed between eldest son s and other brothers, there was not clear difference of height growth speed between them. Rather in many cases the height growth speed of the eldest son looks lower than the average especially after nine years old after when children started to become prod uctive labor