The opposition camp stepped up efforts Tuesday to bring down Prime Minister Naoto Kan, preparing to submit a vote of no confidence against him as early as Wednesday.
The Liberal Democratic Party and New Komeito are ready to jointly submit the motion, and most of the other opposition parties have already voiced their support.
The decision comes at a time when public trust in the Kan Cabinet is in the basement over the way it has handled the crisis at Tokyo Electric Power Co.'s Fukushima No. 1 nuclear plant.