Japan's first daily newspaper, Yokohama Daily, was founded on 1871 under the Gregorian calender, and soon others such as Tokyo Daily, and Post-Dispatch Newspaper followed suit. These newspapers were characterized by their kanbun-style language and their focus on economy and business that matched their target audience of entrepreneurs and intellectuals. By the end of the 1870s, the serialized "reports" called tsuzuki-mono had established themselves as the favorite reading material of newspaper subscribers, stimulating the sales of koshinbun at a time when the newspaper industry as a whole was undergoing rapid expansion due to two contemporary developments: the Seinan War and the Freedom and People's Rights movement. The emergence of the detective story in the late 1880s appeared to be a perfect marriage between content and form within the literary landscape of the time. The late 1890s was a period when major ideological frameworks of the Japanese family were being constructed and propagated in conjunction with the Meiji Civil Code.