Japan’s prime minister on Wednesday called for a push to revive the country’s nuclear power industry in a bid to tackle soaring imported energy costs linked to the Ukraine war.

Such a move could set the stage for a major policy shift and could prove controversial after the 2011 Fukushima disaster led to the suspension of many nuclear reactors over safety fears.

The comments from Prime Minister Fumio Kishida – who also said Japan should look at developing next-generation reactors and extending the lifespan of existing reactors – highlight how the Ukraine crisis and soaring energy costs have forced both a change in public opinion and a policy rethink toward nuclear power.

Like many countries, Japan – which is aiming to become carbon neutral by 2050 – has faced a squeeze on its energy supplies since Russian forces entered Ukraine six months ago.

"Russia’s invasion of Ukraine has vastly transformed the world’s energy landscape" and so "Japan needs to bear in mind potential crisis scenarios," Kishida said at an energy policy meeting.

Japan should consider building next-generation nuclear reactors, he said, while the government will also discuss bringing more nuclear plants online and extending the service life of reactors if safety can be guaranteed.

Japan has kept most of its nuclear plants idle in the decade since a massive earthquake and tsunami in March 2011 triggered a nuclear disaster at the Fukushima Daiichi power plant.

Kishida called for "concrete conclusions by the end of the year" on the topic, which remains a sensitive one after the tsunami in 2011 caused a meltdown at the Fukushima plant, the world's worst nuclear disaster since Chernobyl.

Eleven years on, 10 of Japan’s 33 nuclear reactors are back in action, although not all are operational year-round, and the country is heavily dependent on imported fossil fuels.

The national nuclear safety watchdog has approved in principle the restart of seven more reactors, but those moves often face opposition from local communities.

‘Politically challenging’

"In addition to securing the operations of the 10 reactors that are already back online, the government will spearhead an effort to do all it takes to realize the restart" of the others whose safety has been approved, Kishida said.

The prime minister, who joined the meeting remotely after testing positive for COVID-19, also urged policymakers to consider "constructing next-generation nuclear reactors equipped with new safety mechanisms."

Before the Fukushima disaster, a third of Japan’s power generation came from nuclear sources, but in 2020 the figure stood at less than 5%.

Tom O’Sullivan, a Tokyo-based energy consultant at Mathyos Advisory, said building next-generation reactors in Japan would be a "major step," because "all the current reactors are conventional ones."

Bringing more existing nuclear plants online will need to be approved by local governors, which could prove "politically challenging," O’Sullivan told Agence France-Presse (AFP).

"But again, there’s a different environment now after the Ukraine war," he said.

For the Japanese public, "I don’t think it’s just the electricity costs. It’s the reliance on Russia, for natural gas, oil and coal ... the Japanese public have really woken up to that."

The price of Japanese shares related to nuclear power surged in afternoon trade as local media reported the possible plans, with Tokyo Electric Power ending up 9.96% and Mitsubishi Heavy Industries jumping 6.85%.

Japan has imposed sanctions on Russia over the war in Ukraine along with other G-7 countries.

The government has also pledged to make efforts to reduce its energy dependency on Russia, which supplies around 8% of Japan’s liquefied natural gas (LNG) needs.