(UPDATE) Now, Noda is supposedly tired of being called a "liar", and he will dissolve the Lower House in December and call an election after all, or so some Japanese media outlets say. A few articles down, these outlets also whisper the secret plan by DPJ politicians not fond of Noda.
(Drum rolls please...)
Force Noda to resign, call the DPJ leadership election to elect Goshi Hosono, who then will become the prime minister, then PM Hosono will dissolve the Lower House and call an election, to the landslide victory for the DPJ.
From Jiji Tsushin (11/12/2012):
"Dissolving [the Diet] soon" was just a suggestion", says Prime Minister Noda
In the Lower House Budget Committee meeting in the afternoon of November 12, Prime Minister Yoshihiko Noda said, "(At that time), I felt I have no choice but use suggestive words in order to break the deadlock", concerning the promise he had made to then-LDP President Sadakazu Tanigaki in August that he would dissolve the Lower House "soon". Noda's remark was in response to the question by Ishiba Shigeru, Secretary-General of LDP.
Meanwhile, Noda's Chief Cabinet Secretary Fujimura is in his own delusional world, saying he is determined to turn around the Japanese economy which dipped into the negative GDP growth (-3.5%, on annual base) in the third quarter, so that he can tax the hell out.
I haven't known an economy that decides to prosper when it is told it will be taxed heavily. But maybe Japan is different.