The green shipping corridor initiative is a global effort to align the shipping industry with the 1.5°C trajectory. It aims to create maritime routes in which mainly zero-emission ships travel, run ports with 100 percent renewable energy, and enforce mandatory use of on-shore power for docked vessels.  This report underscores the importance of targeting the three global economic powers that already have established close trading relations. The report finds that green corridors between the countries’ top two busiest routes (Busan-Tokyo and Yokohama; Busan-Los Angeles and Long Beach) can reduce up to 41.3 million tCO2 each year—equivalent to annual emissions from over 9 million passenger vehicles in the United States.