The Japanese government officially declared carbon neutral in the international aviation space by 2050 at the High-level Meeting on the Feasibility of a Long-term Aspirational Goal for International Aviation CO2 Emissions Reductions (HLM-LTAG) of International Civil Aviation Organization (ICAO) in Montréal, Canada, from 19 to 22 July 2022. 

The HLM-LTAG discussed the CO2 emissions reduction scenarios and options for a goal, along with the means of implementation and the monitoring of progress, before concluding with recommendations. 

The meeting outcomes will be considered by the ICAO Council in August, and then by all 193 Contracting States to the Chicago Convention on International Civil Aviation at the upcoming 41st Session of the ICAO Assembly this September.