Though there are a lot of former prime minister in Japan, former Japanese prime minister Hatoyama Yukio stated he is going to take part in the protest in front of (his former) official residence in the interview of Iwakami Yasumi on 7/18/2012.
The protest is planned to start in 15 minutes from now.
Hatoyama commented, most of the major media try to ignore the protest, but it started independently by using Twitter etc.
This is a historical event, if the government keeps ignoring it, that would become such a disaster for the government.
He admitted he is against the restart of Ohi nuclear plant.
Iori Mochizuki