Today the voters in Japan are headed to the polls and if the pre-election polling is correct the long dominant Liberal Democratic Party (LDP) is going to experience a defeat, quite possibly by landslide margins.
The LDP has ruled Japan for almost all of the 54 years since the end of World War Two but they have suffered major losses recently, including the loss of control of the less powerful upper house. This time they are likely to lose control of the powerful lower house and may drop to less than 1/3 of the chamber, with many key leaders at risk.
However it does not seem likely that there will be a major shift in foreign policy, though there may be major changes in domestic programs and in tradition minded Japan the mere shift in political control could be a major event