Is it true: Fukushima Radiation Cover-Up Claims?

Partly — it's more complicated than the claim suggests.

The March 11, 2011 earthquake and tsunami caused the Fukushima Daiichi disaster; TEPCO had failed to adequately protect the plant against tsunami risk that its own engineers had identified pre-disaster. Post-accident TEPCO and Japanese government communications were inadequate — delayed disclosure of core meltdowns, understating radiation levels in early days, and concealing water contamination issues (documented in the Kurokawa Commission 2012 report). However, WHO and UNSCEAR scientific reviews have concluded direct radiation-related health effects for the general public were minimal; the vast majority of ~18,500 deaths were from tsunami alone. Two TEPCO workers died from radiation-adjacent causes during cleanup. Thyroid cancer screening in affected children has not shown statistically-robust radiation-attributable increases. Management cover-up of warnings and initial reporting: confirmed. Mass radiation-death claims: not supported.