The assessment of relative living standards, dominated by food, has been central to analysis of the timing and causes of the Great Divergence. Comparative quantitative measures of real incomes and food availability have generated the conclusion that living standards on the western side of Eurasia, in particular in England, were already higher than those observable on the eastern side by the seventeenth century, with the divergence widening thereafter. However, in the English case, research based on evidence as to what people actually ate suggests that the path of dietary change was by no means a straightforward matter of rising calorie consumption. When viewed in the light of this, evidence derived from the work of food historians of Japan can similarly be used to reveal a more complex pattern of dietary development than can be encompassed in quantitative estimates, even if along the lines of a very different diet and cuisine. This needs to be taken into account when living standards are compared across the divergence.
