The government on Tuesday compiled a report on the nuclear crisis at the Fukushima No. 1 plant for submission to the International Atomic Energy Agency, underlining the need to reinforce measures against earthquakes, tsunami and other calamities.

In the report, the government admits that the crippled plant lacked the necessary features to survive the huge tsunami and other critical accidents of March 11. The plant was not built with considerations to withstand 14-meter tsunami or higher.

"It is unavoidable to fundamentally review the safety measures for nuclear plants" in Japan, states the report, which will be presented at an IAEA ministerial meeting beginning June 20.