The crisis at the Fukushima nuclear plant was "a profoundly man-made disaster", a Japanese parliamentary panel has said in a report.

日本某国会委员在一篇报告中称，福岛核电站泄露事件是一场“严重的人为灾难”。

The disaster "could and should have been foreseen and prevented" and its effects "mitigated¹（减轻，缓和） by a more effective human response", it said.

The report catalogued serious deficiencies in both the government and plant operator Tepco's response.

It also blamed cultural conventions and a reluctance² to question authority.

The six-reactor Fukushima Daiichi nuclear plant was badly damaged after the 11 March 2011 earthquake and tsunami³ knocked out cooling systems to reactors⁴, leading to meltdowns and the release of radioactivity.

Tens of thousands of residents were evacuated⁵ from an exclusion⁶ zone around the plant as workers battled to bring reactors under control.

'Insular⁷ attitude'

Japan's parliament established the panel in May 2011 to examine the handling of the crisis and make recommendations.

In the panel's final report, its chairman said a multitude of errors and wilful⁸ negligence⁹ had left the plant unprepared for the earthquake and tsunami.

"Although triggered by these cataclysmic events, the subsequent accident at the Fukushima Daiichi Nuclear Power Plant cannot be regarded as a natural disaster," it said.

"It was a profoundly man-made disaster - that could and should have been foreseen and prevented."

After six months of investigation¹⁰, the panel concluded that the disaster "was the result of collusion between the government, the regulators and Tepco" founded in the failure of regulatory systems.

It said that the situation at the plant worsened in the aftermath of the earthquake because government agencies "did not function correctly", with key roles left ambiguous（模糊不清的） .

It also highlighted communication failures between Tepco and the office of Prime Minister Naoto Kan, whose visit to the site in the immediate¹¹ aftermath of the earthquake ""diverted" staff.

The report said regulators should "go through an essential transformation¹² process" to ensure nuclear safety in Japan.

"Japan's regulators need to shed the insular attitude of ignoring international safety standards and transform themselves into a globally trusted entity," it said.