Yes, you heard it right, in Japan, their cabinet council determined that twittering by candidates during their election campaign illegal under Japanese Public Election Law, which classifies twittering as “election campaign by texts or graphic.”
This sounds really insane, but it is already illegal for candidates to even update blogs during their election campaign.
Why? Because their law is so outdated that the law pretty much allows only limited method of election campaign. What are they? They are posters at the designated board, limited number of fliers and postcards, use of cars with speaker to announce their name, etc.
Other than that, they are pretty much restricted to do anything to promote themselves. They have this kind of regulation, because apparently, having those allowed grants them unfair advantages over other candidates.
So, no, if you are living in Japan and happen to get voting rights in Japan, don’t expect to find useful information on the net.