A Japanese company is preparing to dump 777,000 tonnes of radioactive waste into the ocean.
The 2011 Tsunami, which killed 16,000 people, also disabled the emergency generators at Fukushima Nuclear Power Plant.
This meant the cooling systems were not active when the reactors shut down.
According to the Japan Times, this caused the biggest nuclear disaster since Chernobyl.
While the clean-up operation continues to this day, tonnes of water is used to pump through the reactors to stop them overheating.