There are several statements that TEPCO made before, during, and after the Fukishima incident that were directly refuted by the IAEA report on the disaster. And I certainly agree that it doesn't help the cause of Nuclear Power use when such things occur. There were also false and misleading statements made by the opponents of Fukishima but I hold them to a lower standard than I do TEPCO.

"Ideally, in a crisis, a government would communicate effectively to its people and the global community. Risks associated with the crisis and ongoing efforts to manage the crisis would be clearly articulated. Efforts would be made to provide factual reassurances to the international community. All of this would be done with timely information provided by recognized authorities in a coordinated fashion. Fundamental to such effective crisis communication would be adherence to a sound, well-researched accident management plan predicated on coordination and support among government entities and the utility (or utilities) involved and on trust among all parties, including the national and global communities.

None of the above happened with the Fukushima Daiichi accident. The reasons why are not entirely clear. Obviously, the Japanese government; safety authorities; and TEPCO, the nuclear utility, had a stake in the conduct and outcome of the accident, and they, for their own benefit at least, needed to provide reliable, timely information to their stakeholders and constituents. In addition, many other organizations across the globe had a stake in the conduct and outcome of the accident, and they too needed solid information to be provided to them so that they themselves could provide meaningful information to their decision makers, stakeholders, and constituents. What was actually executed was unfortunate for all parties involved."

From -- http://fukushima.ans.org/report/societal-context

this is very well covered. its trivial to search for sources yourself.

as for the lying part: check the timeline

https://en.wikipedia.org/wiki/Timeline_of_the_Fukushima_I_nu...