The Democratic Party of Japan is wrong. It's fixated on government "of Ozawa, for Ozawa and by Ozawa." The party has forgotten the people and is intent on protecting its leader, Ichiro Ozawa.
Ozawa should cooperate with the federal investigation. Here's a very important point: The 5th Committee for the Inquest of Prosecution agreed unanimously that it was unjust to not prosecute Ozawa. If the Diet chooses to ignore this, it is abdicating its responsibility.
All the opposition parties should unite and not diverge from the goal of getting Ozawa to give sworn testimony. If the DPJ denies this request, the opposition should stop discussing any bill submitted by the Hatoyama cabinet and appeal to the people that the DPJ has acted wrongly. If the DPJ continues to protect Ozawa, the opposition should call for the dissolution of the lower house and new elections. If the issues surrounding Ozawa and Prime Minister Yukio Hatoyama are treated vaguely, the people's trust will be lost. The DPJ would definitely lose a general election centered on the theme of "politicians and money" and the roles of Hatoyama and Ozawa.