The Japanese Communist Party will not form an alliance with the Democratic Party of Japan or any other party regardless of how the July 29 House of Councilors election turns out, according to party leader Kazuo Shii.

Policy differences between the JCP, which strongly opposes any change to war-renouncing Article 9 of the Constitution, and the DPJ are too wide, Shii said during a recent interview with The Japan Times.

"It would be almost impossible to cooperate with the DPJ," he said.