The political funds controversy hanging over the Democratic Party of Japan is likely to start boiling Tuesday when prosecutors decide whether to indict DPJ President Ichiro Ozawa's top secretary, Takanori Okubo, whose period of custody ends the same day.
Pundits say a decision to extend custody may trigger Ozawa's resignation.
Until more details of the investigation are disclosed, however, it is unclear how badly the allegations will affect the DPJ and its bid to grab power in the general election that must be held by fall.