NicoJapan is currently the world’s seventh largest emitter of greenhouse gasses. In 2022 it accounted for 2.20% of all global emissions.
To see the list of the top 10 global emitters:
The 10 Countries with the Highest Greenhouse Gas Emissions
Just 10 countries emit nearly 2/3rds of all greenhouse gasses. Just 2 countries emit 2/3rds of that.