Opponents of the project also accuse the Japanese government of taking advantage of waning international concern about the gradual discharge of the plant’s water into the Pacific to accelerate the disposal of the land.

The soil and debris have been collected from thousands of square kilometres of land in northeast Japan that was contaminated after a magnitude-9 earthquake and subsequent tsunami ruptured three of the six nuclear reactors at the site in March 2011, releasing radiation into the atmosphere.

After a 16-month safety review, the IAEA delivered its final report to Environment Minister Shintaro Ito on Tuesday, expressing support for the government’s plans to reuse vast amounts of soil and debris with low levels of radiation contamination. The IAEA study included examinations of the existing interim storage site for the waste and recycling techniques being trialled in Fukushima prefecture.

The report concluded that the recycling and final disposal of the soil were “consistent with the IAEA safety standards.”