Another characteristic of DPJ groups not evident in the LDP factions is the fact that several individual DPJ Diet members have been identified as members in more than one group.

As to the Ozawa group/faction, if I am not mistaken, some of the Ozawa children did not support him in his attempt to wrest the DPJ post of "representative" from Kan.

The following Tokyo Shimbun article has a recent breakdown of the DPJ groups' memberships, among other
things:

http://www.tokyo-np.co.jp/article/politics/news/CK20110
82102000022.html
Best regards.

Ehud