Japan's electoral system, which emphasizes first-past-the-post, single-member district rules, has led the country's party system to become consolidated around the Liberal Democratic Party (LDP) and Democratic Party of Japan (DPJ). At the same time, Japan's electoral rules also made it likely that the two parties would not differ markedly in their policy positions, as well as hinder the emergence of new partisan alignments that could offer more clearly distinct policy options. Put differently, Japan's electoral rules have encouraged the development of what is essentially a two-party system, but one in which party alternation in power need not produce sharp policy change.
