Japan's Prime Minister Suga Yoshihide has notified UN Secretary-General Antonio Guterres that his government will aim to achieve a carbon-neutral society by 2050.
Suga spoke to the head of the global body on the phone on Tuesday and explained that he announced the goal in his policy speech in the Diet the previous day.
He said Japan will join the Climate Change Alliance, a group of countries and businesses that aim for carbon neutrality under Guterres' initiative.
Guterres replied that he sincerely welcomes, highly appreciates and fully supports Japan's courageous decision.
Suga said that toward the UN conference on climate change, Japan intends to accelerate the "virtuous cycle of environment and growth" through innovation and continue to lead the international community.
Suga also told the UN chief that the coronavirus pandemic is threatening human security. He said Japan will continue to cooperate with the UN to support the global response to the virus.