The general election to the House of Representatives in December 2012 and the periodic election to the House of Councilors in July 2013 are two important parliamentary elections in the modern history of Japanese politics.The result of the two election enabled LDP to regain power and put an end to the “twisted Diet” in Japan，which had lasted for six years after the ruling and opposition parties respectively retained a majority of seats in two houses of Japanese Diet.It has a profound impact on the Japanese party politics，further strengthening the trend of political right deviation and reducing the influence and living space of the left-wing，revolutionary parties which have played a balancing role in the post-war era. Under the leadership of ideological conservative rightists，LDP will more actively pursue Japan’s rise as “a normal country” and a military power. How the leftist parties react to the situation and improve their own political influence remains a key task.