The Democratic Party of Japan is dead. (Link - J)
It is all up to the Emperor now. He can either follow precedent and accept Noda's request for a dissolution. Or he can summon Noda, Liberal Democratic Party president Abe Shinzo and New Komeito leader Yamaguchi Natsuo up to the Imperial Palace and tell them how disappointed he is in them.
To unload this steaming, constitutionally suspect action in the Emperor's lap is not the mark of A Good Citizen.