異なるレベルの選挙制度が阻害する日本政治の変化

抄録

This study examines, using the municipality-level data, that the electoral system of the House of Councilors and Local assembly has an impact on changes in the vote share in the election of the House of Representatives. In Japan, a mixed system is adopted in the electoral system of the House of Representatives, the House of Councilors and Prefectural Assembly. In addition, because the mixed system of HoC and PA is composed of single member district and multi member district, inconsistent of district magnitude occurs in the municipality-level. Considering the split ticket voting and electoral strategy of political parties, inconsistent of district magnitude impede the expansion and strengthening of local organizations of the Democratic Party Japan. The result of an analysis indicate that the more district magnitude of HoC and PA increases, the more changes in the vote share of the Democratic Party is also increased. The results of this analysis suggest that the confl ict structure of the Liberal Democratic Party to non-Liberal Democratic Party has not changed with the 1955 regime.