www.mlit.go.jp/sogoseisaku/ocean_policy/sosei_ocean_tk_000034.html

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海洋：船舶からの硫黄酸化物の放出の規制について - 国土交通省

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http://www.mlit.go.jp/sogoseisaku/ocean_policy/sosei_ocean_tk_000034.html

About this page

This page outlines regulations on sulfur oxide emissions from ships. Under the MARPOL Convention and Japan's Marine Pollution Prevention Law, fuel oil used in general ocean areas must not exceed 0.5% sulfur content as of January 1, 2020. The regulations apply to all vessels navigating these waters, with exemptions for ship safety, unavoidable circumstances, approved research, equipped scrubbers, and cases where compliant fuel is unavailable. The regulations aim to prevent air pollution and protect marine environments.