There's no more stopping Japan from restarting and blasting again online its suspended nuclear reactors.

This weekend, Japan, a year after being struck by a debilitating earthquake and tsunami that destroyed one of its nuclear reactors, is ready to bring back to life two of its suspended nuclear power plants.

The two reactors are in the western town of Ohi. Town Mayor Shinobu Tokioka on Thursday said he allowed the restarting of the idle nuclear reactor amid concerns on possible power shortages.

Japan has a total of 54 nuclear reactors, but all have been shutdown amid public clamor of safety concerns. The people likewise pressured federal government that all reactors undergo maintenance and rigid stress tests owing to the Fukushima meltdown crisis.

Although public perception to reopening the nuclear power plants still remain negative, the federal government have been saying the use of nuclear energy is important to Japan's economy.

Moreover, according to financial site Penny Stock Detectives, all energy sources, when studied side by side, nuclear energy does far exceed the capacities of other energy sources by at least over 90 per cent capacity utilisation.

With the reopening of Japan's nuclear reactors, uranium demand is expected to regain strength.

"Nuclear power will remain a large source of energy production over the next decade to support the increase in energy usage, driving up demand for uranium," financial newsletter Profit Confidential said.

The world's consumption of uranium in 2011 reached 69,000 tonnes, The Australian reported, citing data from the World Nuclear Association. Majority or 80 per cent came directly from mines, while the rest from secondary sources such as commercial stockpiles and decommissioned nuclear weapons.

A possible supply shortage of uranium is seen two years from now, what with several new nuclear power plants expected to go online in China, India and Russia between now and 2014.