Japan’s efforts to phase out coal-power generation remain the weakest among the seven most developed countries (G7), a report released this week shows.

According to climate diplomacy and energy policy firm E3G, the US and the UK lead the charge, with Britain recently climbing to second place thanks mostly to coordinated efforts to cut dependency on coal.

Source: E3G’s G7 coal scorecard.

The study by the non-profit group, which promotes a low-carbon economy, comes as top leaders prepare to gather in western Japan for a meeting of G7 nations on May 26 and May 27. Environmental groups have used the lead-up to the gathering to increase pressure on Japan to review its policy on coal power.

Though many developed nations are in the process of shifting away from coal, the fossil fuel was identified in a recent policy statement as an important component of the country’s energy mix.

“An additional 4 gigawatts of proposed new coal-plant capacity has been cancelled, leaving Japan as the sole G7 country actively seeking to build new coal-power plants,” author Chris Littlecott wrote.