After the devastating earthquake on Friday, a huge pall of smoke was seen billowing from Fukushima power plant Saturday March 12, 2011.
Fukushima plant is about 250-kilometers (160-miles) distance from northeast of Tokyo.
Failure of reactor cooling system hold responsible of the explosion after 8.9 magnitude earthquake struck the area and unleashed a terrifying 33-foot (10-meters) high wave that destroyed coastal towns and cities.
No.1 Fukushima plant had experienced a nuclear meltdown causing the damaged to the cooling system, said Kyodo and Jiji Press.
After the authorities seeing to it that the trouble would take time to fix the problem, evacuation of residents about 45,000 within the 10-kilometers radius was highly recommended.
The blast injured four workers. Radioactivity rose to 20-fold said operator of Tokyo Electric Power Company (TEPCO).
Fukushima power plant No.2 has also suffered damaged with cooling system problem, thousands of residents within the danger zone were also evacuated from the second plant.