Only two weeks from the start of the extraordinary Diet session, three Democratic Party of Japan lawmakers will leave the DPJ to form a new political party with two Upper House independent lawmakers, officials said.

The three DPJ lawmakers are Hideo Watanabe, a former posts minister, Yasuhiro Oe and Yumiko Himei, all of whom are House of Councilors lawmakers. They have already submitted their resignations to the DPJ, the party said.

The three were reportedly dissatisfied with the current situation of the party led by Ichiro Ozawa, who is likely to be reinstalled without a vote at next month's DPJ presidential election.