The Essay is focused on the new election system of Japanese House of Representatives'' to find out the roles of election system in Japan democratic Progress. To perfect the electoral system, Japan had mended its election system of the House of Representatives 14 times since 1889 till 1994. In 1993, some political issues, included the reform of election system, eventually led Prime Minister Miyazawa Kiichi to resign and ended the Liberal Democratic Party'' 38-year-old reign, as well as the so-call"55 system（the party system of 1955）".During the past century, Japan has tried small, medium and large sized district systems, currently "First past the post with Proportional Representation System", to constitute a fair and better system which is expected to improve Japan''s political environments and make voters trust the politics.
However, the "First the post with Proportional Representation System" still has some problems, including multiple candidacies, unequal value of each vote, excessive Representatives from farming areas, etc. In whole, the latest election system still suffers from some legacies of the mid-sized district system and merely sets up a "two major plus small parties" political system, far from two dominant major parties like those in the U.S.A. and U.K.
When compared Japan''s election system with similar Germany system, it is hard to tell which one is better. It might be inappropriate for Taiwan to introduce either system without some modifications. Taiwan should learn from both systems and find a proper way to fit into Taiwan''s situation. At last, it shall come to our attention that an ideal and everlasting election system must meet the majority''s opinion to make politics more democratic, and people happier.