Japanese cuisine has developed over the centuries as a result of many political and social changes. The cuisine eventually changed with the advent of the Medieval age which ushered in a shedding of elitism with the age of shogun rule. In the early modern era massive changes took place that introduced non-Japanese cultures, most notably Western culture, to Japan.Japanese cuisine has developed over the centuries as a result of many political and social changes. The cuisine eventually changed with the advent of the Medieval age which ushered in a shedding of elitism with the age of shogun rule. In the early modern era massive changes took place that introduced non-Japanese cultures, most notably Western culture, to Japan.