OSAKA — Antinuclear activists on Tuesday urged the government to stop advocating, both unilaterally and within the Group of Eight meetings, the expansion of nuclear power in Asia as a solution to reducing regional greenhouse gas emissions.

"The Japanese government is promoting exports of nuclear power plants to Asia and the rest of the world because construction of new nuclear power plants in Japan is declining," the activists wrote in a letter sent both to the Ministry of Economy, Trade and Industry and the Foreign Ministry.

"In the name of responding to global warming, the nuclear industry throughout the world, including in Japan, is pushing strongly for a great expansion of nuclear power," it said.