BBC: Japan is to invest hundreds of millions of dollars into building a frozen wall around the Fukushima nuclear plant to stop leaks of radioactive water.
Government spokesman Yoshihide Suga said an estimated 47bn yen ($473m, 304m) would be allocated.
The leaks were getting worse and the government "felt it was essential to become involved to the greatest extent possible", Mr Suga said.
The plant was crippled by the 2011 earthquake and tsunami.
The disaster knocked out cooling systems to...