Fujitsu has started development of its planned 10,000-plus qubit superconducting quantum computer, with construction of the system expected to be completed in 2030.

The quantum computer will initially operate with 250 logical qubits and utilize Fujitsu’s STAR architecture – an early-stage fault-tolerant quantum computing (early-FTQC) architecture developed by the company.

Following the system’s completion, Fujitsu said it will pursue “advanced research initiatives targeting the integration of superconducting and diamond spin-based qubits,” with the aim of realizing a 1,000 logical qubit machine by 2035 alongside research into the possibility of multiple interconnected quantum bit-chips.

The project will be carried out in part under the ‘Research and Development Project of the Enhanced Infrastructures for Post-5G Information and Communication Systems,’ for which Fujitsu has been selected by NEDO (New Energy and Industrial Technology Development Organization) as an implementation partner.

Expected to run until 2027, it will be supported by Japan’s National Institute of Advanced Industrial Science and Technology (AIST) and the Riken Center for Computational Science. Fujitsu said the research efforts will focus on high-throughput, high-precision qubit manufacturing technology; chip-to-chip interconnect technology; high-density packaging and low-cost qubit control; and decoding technology for quantum error correction.

"Fujitsu is already recognized as a world leader in quantum computing across a broad spectrum, from software to hardware,” said Vivek Mahajan, corporate executive officer and VP, CTO, in charge of System Platform, Fujitsu. “This project, led by NEDO, will contribute significantly to Fujitsu’s goal of further developing a Made-in-Japan fault-tolerant superconducting quantum computer.”

He added: “We would also be aiming to combine superconducting quantum computing with diamond spin technology as part of our roadmap. By realizing 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.”

In April 2025, Fujitsu and Japan’s Riken announced the development of a 256-qubit superconducting quantum computer, building on the 64-qubit quantum computer previously developed and deployed by the two partners at the Riken RQC-Fujitsu Collaboration Center in October 2023.

The 256-qubit machine utilizes the same unit cell design established in its 64-qubit predecessor, and despite the system quadrupling in density, it can still be scaled within the previously developed dilution refrigerator. The two partners said they will integrate the 256-qubit superconducting quantum computer into their hybrid quantum computing platform.

In other recent quantum news:

• AI and HPC data infrastructure company Vdura has partnered with New Mexico State University to develop post-quantum cryptography for the petabyte-scale pipelines that power next-generation AI and HPC workloads.
• D-Wave has announced a new strategic development initiative focused on advanced cryogenic packaging. Designed to advance and scale both gate model and annealing quantum processor development, the project will also see D-Wave work with the NASA Jet Propulsion Laboratory, utilizing the lab’s specialized manufacturing processes to connect quantum chips more effectively.
  Also this week, D-Wave launched a new open-source quantum toolkit for AI workflows.
• Israeli quantum startup QuamCore has raised $26 million in a Series A funding round to build a million-qubit quantum computer. The company says it has developed a quantum computing architecture that reduces cabling requirements inside cryogenic refrigerators by a factor of more than 1,000, making it possible to place one million qubits in a single fridge.
• Quantum Art, another Israeli quantum computing startup, has demonstrated a stabilized, fully linear 200-ion chain beyond the 30–50 ion threshold – one of the longest linear ion chains ever achieved in an industry-grade quantum system. Quantum Art says the demonstration confirms its ability to engineer ion traps with the quality and scale necessary to support 1D crystals extending into the hundreds and beyond.