Through out my stay in Japan, there have been occasional cars driving around with megaphones mounted to the roof of the vehicle blasting a stream of loud Japanese. Almost all of them have been women's voices all high pitched and nasally sounding.
It seems that recently there has been some backlash against the campaign vehicles as noise pollution and there has been some efforts to restrict the volume that is allowed. This doesn't seem to be getting much traction as most Japanese are so used to the constant barrage of noise that it does not bother them all that much.
This seems like a very ineffective way to conduct a political campaign but it seems that there are many restrictions to how politicians are able to campaign in Japan. Email and political campaign websites are very restricted with what they are allowed to post and door to door campaigning is banned. Television and radio adds are allowed but there is a cap as to how much a candidate can spend on a political campaign.
Even the number of posters and pamphlets a candidate can distribute is restricted.
Several places around town are boards that have pictures of each of the people running for office.
I feel a little bit conflicted about the number of rules an regulations around the political campaigns in Japan. On one hand it seems very limiting but on the other hand I can help but wonder how different American politics would look if each candidate had a cap on the amount of money that could be spent on their campaigns. What if politicians voted for what they believed in without influence of which lobbyists would contribute to their re-elections?