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The commission concluded that Fukushima was a preventable man-made disaster rather than an unforeseeable act of nature. TEPCO and regulators had evidence before 2011 that tsunami and seismic risks exceeded the plant's design basis. They repeatedly deferred countermeasures, so the earthquake and wave triggered a failure that the institutions had already set up.
Regulatory capture is when the regulated party comes to control its regulator. At Fukushima, NISA and the Nuclear Safety Commission lacked the expertise and independence of TEPCO. Regulators relied on the utility's information and deferred to its preferences. As a result, safety rules were delayed or softened to protect operators' interests, and oversight ended up working for the industry it was meant to police.
The report traces the failure to cultural habits: reflexive obedience, reluctance to question authority, loyalty to the program, groupism, and insularity. These habits suppressed dissent inside TEPCO and the regulators. Under this lens, individual errors look like the predictable output of shared norms, not isolated mistakes, which makes the norms themselves a target for reform.
Officials insisted that nuclear plants were absolutely safe, and that insistence became a trap. Admitting any need for severe-accident measures would imply the plants had been unsafe, which would invite lawsuits and public opposition. So acknowledging a risk became a liability, and preparation for the worst case was avoided.
During the crisis, Prime Minister Kan's office bypassed the official chain of command and intervened directly at the plant, including a site visit. Unclear roles and poor information flow between the Kantei, TEPCO headquarters, and on-site operators caused confusion. The report uses this to show that crisis management fails when authority lines are undefined and leaders substitute personal intervention for designed systems.
The commission prescribed structural fixes rather than personnel changes. Its recommendations were a permanent Diet committee to monitor regulators, a truly independent and transparent regulatory body, and reform of utility governance. It also called for a rethought emergency response system, protections for affected residents, and continued independent expert investigation. The logic is that captured systems cannot reform themselves, so an outside body with legislative authority must hold them accountable.