Fujitsu, in partnership with RIKEN and the National Institute of Advanced Industrial Science and Technology, has commenced construction of a quantum computer expected to surpass 10,000 qubits.

The new quantum computing system is scheduled for completion in 2030 and will employ Fujitsu’s proprietary “STAR architecture,” an early-stage fault-tolerant quantum computing design. The system is projected to operate with 250 logical qubits, with an overall 10,000 physical qubits, targeting the execution of complex simulations and computational tasks believed to be beyond the capabilities of existing classical computers.

Development goals

Fujitsu’s stated aim is to advance practical quantum computing, with a particular focus on enabling research in fields such as materials science. The collaboration with RIKEN and the National Institute of Advanced Industrial Science and Technology forms part of the “Research and Development Project of the Enhanced Infrastructures for Post-5G Information and Communication Systems”, promoted by Japan’s New Energy and Industrial Technology Development Organisation (NEDO), and will continue until the end of fiscal 2027.

Following the anticipated completion of its 10,000-qubit superconducting quantum computer, Fujitsu outlined plans to integrate superconducting and diamond spin-based qubits from 2030, with a view to realising a quantum computer with 1,000 logical qubits by 2035. The roadmap also includes research into multiple interconnected quantum bit chips to facilitate scaling.

Technical milestones

The development programme emphasises several critical technology areas: improvement in the manufacturing precision of Josephson Junctions for high-throughput, high-precision qubit production; advancements in chip-to-chip interconnect and packaging to allow greater integration of quantum hardware; strategies for high-density packaging and reduced-cost qubit control suited to cryogenic computing environments; and the design of algorithms for quantum error correction and measurement decoding.

Vivek Mahajan, Corporate Executive Officer, Corporate Vice President, CTO, in charge of System Platform, Fujitsu, said:

“Fujitsu is already recognised as a world leader in quantum computing across a broad spectrum, from software to hardware. This project, led by NEDO, will contribute significantly to Fujitsu’s goal of further developing a Made-in-Japan fault tolerant superconducting quantum computer. We would also be aiming to combine superconducting quantum computing with diamond spin technology as part of our roadmap.”

“By realising 250 logical qubits in fiscal 2030 and 1,000 logical qubits in fiscal 2035, Fujitsu is committed to leading the path forward globally in the field of quantum computing. Additionally, Fujitsu will be developing the next generation of its HPC platform, using its FUJITSU-MONAKA processor line, which will also power FugakuNEXT. Fujitsu will further integrate its platforms for high-performance and quantum computing to offer a comprehensive computing platform to our customers.”

Research and industry collaboration

The quantum system is designed to be accessible to researchers, startups, and government, supporting the development and testing of software and algorithms for use in real-world applications. Fujitsu intends the platform to serve industries such as quantum chemistry, optimisation, secure computing, and financial modelling, where classical computers face limitations.

Peter Grassi, Chief Executive Officer of Fujitsu Oceania, commented on the announcement:

“Fujitsu is recognised as a world leader in quantum computing, with expertise across the full spectrum from software to hardware. Fujitsu’s 10,000+ qubit quantum computer is a leap forward in quantum computing power, and we’re at the threshold of running useful, real-world quantum algorithms to accelerate breakthroughs in critical fields like medicine, materials science, energy, and finance.”

“The message is clear: the quantum era is no longer a distant theory. Now is the time to start identifying problems in your industry that classical computers currently struggle with, because we’re getting closer every day to having the tools to tackle them.”

In Australia, Fujitsu is collaborating with The Australian National University on the establishment of a quantum research facility, intended to directly support Australia’s National Quantum Strategy and foster local expertise.

Previous advances

Fujitsu’s prior collaborations include the development of the STAR architecture in partnership with the University of Osaka and the achievement of a 64-qubit superconducting quantum computer, as well as a 256-qubit system made available in April 2025. The company is also exploring diamond spin-based qubit technologies in concert with the Delft University of Technology and QuTech, focusing on light-based qubit connectivity and control.

Simulations performed using 60,000 qubits and the STAR architecture have demonstrated the potential to carry out material energy estimation tasks in about 10 hours, compared to five years using conventional computers, according to Fujitsu.

Fujitsu’s ongoing quantum computing programme continues to focus on scaling, hardware fidelity, and the practical application of quantum technologies to address problems beyond the reach of today’s most advanced classical systems.