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Japan’s artificial intelligence ambitions are creating a demand that extends well beyond chips, software and cloud computing. As AI workloads expand, the country will also need a reliable supply of electricity to run increasingly power-hungry data centres. That is putting Japan’s nuclear energy industry—and the businesses supporting it—under a new spotlight.
A recent report from Simply Wall St points out that Hitachi, ITOCHU and Mitsubishi Heavy Industries are nuclear-energy stocks that are linked to the bigger infrastructure opportunity that comes from increased power demand. Hitachi stands out because its business includes energy and grid infrastructure, digital services, data-centre power projects and industrial technology.
AI Is Turning Electricity Into a Technology Issue
The fast growth of AI is changing the way the technology industry works. Creating and running models needs big computing systems and data centres that focus on AI need a lot of electricity that is always available.
The International Energy Agency thinks that electricity use by data centres will more than double to 945 TWh, by 2030. It also says that nuclear power is one of the sources that will help meet this demand especially in Japan, China and the United States.
For Japan, this creates an interesting intersection between energy policy and digital transformation. The government is already supporting domestic generative-AI development through initiatives such as METI’s GENIAC programme, which is designed to strengthen Japan’s ability to develop and deploy generative AI.
More AI capacity ultimately means more pressure on the electricity system.
Why Nuclear Power Matters to Japan’s Tech Industry
Unlike many renewable sources, nuclear power can provide continuous electricity without relying on weather conditions. That characteristic is valuable for data centres, where interruptions can be extremely costly.
Japan is also looking at nuclear power from a broader energy-security perspective. METI has stated that it wants to maximise the use of existing nuclear reactors while advancing next-generation nuclear technologies. The ministry has also highlighted the need to maintain the country’s nuclear supply chain and skilled workforce as existing reactors face declining supply capacity from the 2040s onward.
That policy direction could benefit companies positioned across several parts of the infrastructure chain.
Hitachi is one example. Its operations combine energy systems with digital services, industrial technology and data-centre infrastructure. Simply Wall St notes that its recent strategy includes AI-related partnerships and projects involving data-centre power, alongside its established energy business.
Mitsubishi Heavy Industries represents another angle. Its nuclear and energy capabilities sit alongside industrial engineering, cooling technologies and infrastructure, creating potential exposure to the physical systems required by expanding AI facilities.
What This Means for Japanese Technology Businesses
The effects could spread far beyond nuclear operators.
For Japanese cloud providers, semiconductor companies and AI developers, access to dependable electricity could become a competitive advantage. Data-centre operators may increasingly consider proximity to power infrastructure when choosing locations, rather than focusing only on fibre connectivity, land availability and proximity to major cities.
Equipment manufacturers could also benefit. AI facilities require transformers, transmission equipment, cooling systems, backup power and sophisticated energy-management technology. This creates opportunities for Japanese engineering companies that can supply both the digital and physical infrastructure surrounding AI.
At the same time, the transition carries risks. Nuclear projects are capital intensive, highly regulated and subject to lengthy approval processes. Businesses building their strategies around future nuclear capacity must therefore account for construction delays, regulatory requirements, financing costs and public acceptance.
A Opportunity. And a Bigger Responsibility
Japans nuclear energy revival is not just about making money. It is, about something bigger. Japan needs to figure out how to use Artificial Intelligence while keeping the electricity system stable, affordable and good for the environment.
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The solution will probably include a combination of things: power, renewable energy updating the electricity grid storing energy and using energy more efficiently. The Ministry of Economy, Trade and Industry or METI says that Japans electricity demand will increase as the country becomes more digital and green. So Japan will need to use energy and renewable energy together to make this work. Japans nuclear energy revival and Artificial Intelligence are closely linked to this plan.
For businesses operating in Japan’s technology industry, that means the future of AI infrastructure will increasingly depend on decisions made in the energy sector.
The biggest beneficiaries may ultimately be companies capable of connecting the two worlds—combining computing, industrial technology, electricity networks and clean-energy infrastructure. Japan’s AI race, in other words, may be powered as much by engineers and energy companies as by software developers.
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