As the world’s most advanced economies discuss tackling climate change in Japan this weekend, the host country is set to face some uncomfortable scrutiny of its policies to deliver on green targets. The Group of Seven have appointed themselves leaders in the global mission to decarbonize. But Japan’s plan to eliminate carbon pollution from its power sector is an outlier among its peers. Its current emissions-reduction trajectory strays the furthest from what’s needed by 2030 to reach net zero by 2050, according to data compiled by Bloomberg and the Network for Greening the Financial System, an organization of more than 100 central banks and regulators.