Japan’s prime minister-elect said he will forge ahead with a tough 25% cut in emissions by 2020, despite growing opposition from industry, which says the target will hurt the country’s economy.

Yukio Hatoyama, who will take office on September 16, said that the target, more ambitious than the outgoing government’s, was premised on a deal on ambitious goals being agreed by major nations, according to Reuters.

“We can’t stop climate change just with our country setting an emissions target,” Hatoyama said in a speech to a symposium on climate change.

The Democratic Party has said a tough 2020 target is needed for Japan to play a bigger role in UN-backed climate talks in Copenhagen in December.

The talks aim to thrash out a new agreement on reducing emissions to succeed the current Kyoto Protocol, the first phase of which ends in 2012.