Abstract
Recently, data traffic to social network sites by the smart phone users has been skyrocketing in Japan. Also, political campaigns using social media are no longer prohibited by law In this paper, I investigated the impact of political campaigns using social media on the 23rd regular election for the House of Councilors and the 47th general election of the House of Representatives. I found that it was quite difficult or impossible to predict the outcomes in case of single seat constituencies in both the House of Councilors and the House of Representatives. In case of the national proportional representation elections, however, it was feasible to predict the results in real time.
