東京方言
During the Edo period under the Tokugawa shogunate most Japanese people could not travel outside of their home domain. As a result, regional Japanese dialects were relatively isolated and became increasingly distinct. After the Meiji Restoration the government, in emulation of the European nation states, sought to create a standard Japanese speech. A Tokyo dialect, specifically that of the upper-class Yamanote area, became the model for Standard Japanese, widely used in schools, publishing, and radio broadcasting. By the early twentieth century, the Ministry of Education and other authorities instituted various policies to reduce or suppress regional differences.