Another path to electoral reform: Cohort replacement and electoral issues for rule changes in Japan

The literature of electoral reform explains politicians' preferences and social forces such as working-class power or expansions of the suffrage are the major factors that bring about a change in electoral rules. However, we argue that generational replacement and electoral issue effects lead politicians to introduce a new electoral system for their electoral survival in future. By examining Japan's surveys for pre- and postreform elections, we show that the entrance of new generation and salient issue concerns dissolve electoral bases of political parties and finally give rise to a change in the rules of the game for the greater electoral stability that political elites desire.