Japan's Greenhouse Gas (GHG) emissions fell by 1.9 per cent in fiscal 2024, which ended in March 2025, government data showed, the third straight annual fall and the lowest since records began on lower manufacturing energy use and greater use of renewable and nuclear power.

According to a report in Reuters, the figure marks the lowest level since records ⁠began in 1990 / 91 and the third consecutive annual decline.
 
Japan's GHG emissions totalled 1.046 billion metric tons of carbon dioxide equivalent in fiscal 2024, down from 1.067 billion tons a year earlier, environment ministry data showed.
 
By sector, carbon dioxide (CO2) emissions from industry fell 2.5 per cent, while the commercial and services sector saw a 0.2 per cent increase. 

Household emissions declined 0.7 per cent, and the transportation sector recorded a 1.6 per cent drop.
 
Japan aims to cut GHG emissions by 46% from 2013 levels by 2030.  The fiscal 2024 figure represents a 24.9 per cent reduction from 2013.

GHG absorption by forests and other sinks fell 2.9% to 52.3 million tons, the ministry said, adding ⁠that Japan's total GHG emissions, after accounting for absorption by sinks such as forests, stood at 994 million tons, down 1.9 per cent from a year earlier.

Emissions surged after the 2011 Fukushima nuclear disaster, which led to widespread nuclear reactor shutdowns and greater reliance ⁠on fossil fuels. 

They peaked at 1.394 billion tonnes in fiscal 2013 before trending downward, supported by increased use of renewable energy and the gradual restart of nuclear reactors.