Energy and environment ministers from the Group of 20 nations began two-day talks in central Japan on Saturday.
The meeting in the town of Karuizawa is being chaired by Japan's industry minister Hiroshige Seko and Environment Minister Yoshiaki Harada.
At the outset of the meeting, Seko said efforts to tackle climate change are gathering momentum but it is crucial for the global economy that energy supplies remain stable.
Seko said the world needs policies that can realize those different values at the same time.
Harada said that in order to deal with global environmental issues, it is essential to achieve a positive cycle between environmental protection and economic growth.
On the first day, participants are expected to discuss energy security, following attacks on oil tankers in the Gulf of Oman.
The ministers are also scheduled to take up the issues of ocean pollution and plastic waste.
Japan plans to propose a framework to report and share progress on plastic waste reduction measures. The proposal is aimed at encouraging countries to make voluntary efforts.
The ministers are expected to issue a joint statement on the second and final day on Sunday.