Japan's nuclear regulator has granted an initial approval for the release of treated radioactive water from the Fukushima plant into the sea.
The Nuclear Regulation Authority gave the greenlight on Wednesday claiming there are no safety concerns.
The plan would have TEPCO filter the contaminated water leaving only the radioactive element tritium.
It will then dilute the water until the tritium levels fall to less than one-40th of regulatory limits before releasing it into the ocean.
Last year Tokyo announced intentions to discharge over one million tons of Fukushima water starting around spring of 2023.
Seoul in response vowed to closely monitor the plan with the IAEA.