Japan has pledged almost € 359 million to contain leakage and decontamination of radioactive water from the Fukushima tsunami.
The commitment is a step forward in the government's efforts to deal with the legacy of the worst nuclear disaster in a quarter century.
The announcement comes just days before the International Olympic Committee will decide whether Tokyo - 230 km from the destroyed factory - will host the 2020 Olympics.
The government is determined to prove that the crisis is under control.
" The world is watching to see if we can perform the decommissioning of the Fukushima nuclear power plant , including the fight against the problem of contaminated water ," said Prime Minister Shinzo Abe Cabinet ministers , who met to approve the plane.
Government intervention is only a small part of the response to the Fukushima crisis caused by the earthquake and tsunami in 2011 that caused collapse of reactors at the plant in March.
Cleaning, including the decommissioning of reactors in ruins, take decades and are based on unproven technology.
The measures do not address the whole problem of water management in the plant or in the larger problem of the closure.
The delicate job of removing spent fuel rods is to begin in the coming months.
The final destination of the plant operator , Tokyo Electric Power Co ( TEPCO ) , it is also clear , as is the question of who will pay the bill over time - the Japanese or TEPCO besieged taxpayers.
" It is a matter of public safety , so that the country should take the lead on this issue and respond as quickly as possible. Discover which charges fees can come later ," said Economy Minister Akira Amari conference free.
Cabinet Secretary, Yoshihide Suga said at a separate press conference that the government would spend a total of 47 billion yen ( € 359m ) , including funds for emergency Budget this year reserve.
Although 32 billion yen ( € 244 million ) will finance the construction of a huge underground wall of frozen ground around the damaged to contain groundwater flow reactors.
The remaining ¥ 15 billion ( € 115 million ) will be used to improve the system for water treatment to significantly reduce radiation levels in contaminated water.