On his second tour of Fukushima No. 1, Prime Minister Abe recycles his "under control" claims from Buenos Aires, requests a deadline for filtering the radioactive water and urges the decommissioning of units 5 and 6.

Tepco put off a plan to create frozen soil shields around Fukushima No. 1 in 2011 after the exorbitant cost raised fears of a bad stock market reaction.

An entry point for some of the groundwater flooding the crippled Fukushima No. 1 plant is found at reactor 1.

Tepco's radioactive water problems at its crippled Fukushima No. 1 nuclear plant seem uncontainable, ranging from leaking tanks to highly radioactive groundwater flowing to the sea.

The public must fund Tepco's effort to freeze the soil around the crippled Fukushima No. 1 reactors to prevent more groundwater from becoming radioactive, Chief Cabinet Secretary Yoshihide Suga says.

More than two years into the triple-meltdown crisis at the Fukushima No. 1 power plant, workers continue to wage a desperate battle to keep the stricken reactors cool while trying to contain the 400 tons of radioactive water produced by the process each day.

There are further leaks of radioactive water during work to transfer water from a leaking sunken reservoir at Tokyo Electric Power Co.'s Fukushima No. 1 power station.

Around 120 tons of contaminated water with 710 billion becquerels of radioactivity probably leaked into the ground under the Fukushima No. 1 power plant, Tepco says.