Why Is Sumitomo Corporation Taking on Quantum Computing? Pioneering Real-World Applications at the Forefront of Social Implementation

What exactly is a quantum computer?

TanakaPut simply, a quantum computer is a machine that uses the physical principles of quantum mechanics to perform calculations. Unlike conventional computers, which process information using bits that represent either 0 or 1, quantum computers use quantum bits (qubits) that can be both 0 and 1 at the same time. This characteristic allows quantum computers to perform certain calculations far more efficiently than classical machines, especially problems that are too complex or time-consuming to solve with current technology.

How might quantum computers change our lives and society?

TanakaThere are generally two types: gate-based quantum computers and quantum annealers (Reference: Strategy of Quantum Future Industry Development). Gate-based systems, which most people associate with the term "quantum computer," are expected to enable ultra-fast simulations involving complex factors, which conventional computers cannot do, thanks to the qubits I mentioned earlier. This is expected to revolutionize areas like new material research, development and analysis, alongside improved financial market forecasting.

Meanwhile, quantum annealers – my specialty – are designed to solve optimization problems through a process analogous to simulated annealing in classical computing, but with higher speed and greater accuracy. Optimization is the process of choosing the best option from many possible ones, and it plays a role in things like staff scheduling, delivery logistics and production management. In this sense, it has important applications for sustainability and SDGs.

What prompted the launch of the QX Project?

* A general term for technology that leverages the principles of quantum mechanics to advance information and communications, measurement and materials development. Quantum computers are a representative example.

Can you share some examples of practical experiments or real-world applications?

OkazakiIn 2020, we ran a pilot project with Belle Maison Logisco, a Sumitomo Corporation Group company at the time, using quantum optimization to improve personnel allocation at warehouses. The results were built into a SaaS (Software as a Service) solution for warehouse operations called Smile Board Connect, which as of June 2025 is used by four companies. In 2021, we conducted the world's first proof-of-concept test for 3D drone traffic control systems optimized by quantum computers – collaborating with U.S. startup OneSky and looking toward a future where flying cars are a reality. Other initiatives include vehicle allocation optimization with a Nordic carshare company, evacuation route optimization with Kyushu Electric Power and mining operation improvements in partnership with an Australian firm.

What are Japan's strengths in the quantum field?

What challenges remain in bringing quantum technology into society?

TanakaWe are currently facing a need to broaden the base of people involved in quantum technology and to establish systems that can make use of it. It’s not just quantum specialists we need – we also need to increase the number of individuals I call "quantum bilinguals" – professionals who can bridge quantum science and practical domains like manufacturing, chemistry, finance, healthcare and AI. We also need better systems for connecting business stakeholders interested in quantum, to build out ecosystems and supply chains.

What role can Sumitomo Corporation play in addressing these challenges?

OkazakiOur role is to connect client challenges with quantum solutions, introduce the right partners and manage entire projects. One of our biggest advantages is our ability to identify suitable use cases across our vast range of businesses, run proofs of concept and scale successful results.

TatsumiOn top of that, one of Sumitomo Corporation’s key strengths lies in the trust-based relationships we’ve built with numerous companies over the years, giving us a deep firsthand understanding of the challenges they face. We also maintain strong connections with quantum technology vendors in Japan and overseas, and our track record in project management – honed through extensive business investments and system integration projects – puts us in the position to drive initiatives forward. Many of the projects we’re already engaged with are rooted in real issues faced by long-standing partners, and we’re putting the expertise we've developed through digital transformation efforts into practice. We’re also bringing in talent from AI specialists like Insight Edge and SCSK, giving us a clear advantage in implementing technology at the operational level.

As an external partner, what are your expectations for Sumitomo Corporation?

TanakaSumitomo Corporation took the lead early on in launching the QX initiative and building communities around it, which is highly meaningful. The possibilities for applying quantum are endless, and collaboration across industries is essential for meaningful progress. I hope Sumitomo Corporation will continue to lead the development of Japan's quantum ecosystem and supply chains.

What are your hopes for the future?