Abstract
In Japan (1890-1945), the constituency system was often switched (to the single-seat constituency → the large-constituency → the single-seat constituency → the medium constituency). The main reasons of the constituency system changes were to elect valuable representatives from the national point of view. This article schematically traces a circle as below : 1) the aim of adapting the constituency system, 2) the analysis of the elected representatives in fact, 3) the evaluation of the system, 4) the emergence of debates on the issue of the constituency system reform. As a result, it is clear to say that the reformed system initially operated for the institutor's political advantage. However, in the longer term, that system transformed the representative's quality by grinded against society and quite often yielded perverse effects for the speculation of the institutor's political strategy.
