Tens of thousands filled the square as the echoes of the speaker at the podium boomed through huge speakers. Some came in anger, others in grief, but all agreed: it was time for a change. Many carried banners, others carried drums; some had taken their children out of school to attend. No, this wasn't Tahrir Square; it was Tokyo, Japan, on a chilly Monday last September. Ever since the devastating earthquake and tsunami that crippled the Fukushima Daiichi nuclear power station, Japanese civil society has become less, well, polite.