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COMPANY RESEARCH / 6702.T

Fujitsu

256-qubit superconducting computer developed with RIKEN

Published by FyncaResearch checked How we research

Where it fits in a quantum computer

With RIKEN, developed a 256-qubit superconducting quantum computer (Apr 22, 2025) built from 4-qubit unit cells in a 3D connection structure, with a new 256-qubit chip and sample package and quadrupled implementation density inside the same dilution refrigerator as its 64-qubit predecessor. It is offered to companies and research institutions through Fujitsu’s hybrid quantum computing platform, and a 1,000-qubit machine was scheduled for installation at Fujitsu Technology Park in 2026.

What the evidence establishes

Quantum-computing evidence

Disclosed: Fujitsu’s release with RIKEN describes the 256-qubit machine, its chip and sample-package design and the 1,000-qubit plan.

An explicit quantum-computing product, design-in, supply role, program or partnership, such as a part sold for quantum computers or a named quantum-computer customer. For a maker, it means the company’s own quantum computers or processors. This does not establish revenue, market share, volumes or future sourcing.

Listed as a quantum-computer maker for its own systems, not as a supplier of the parts inside.

Component role256-qubit superconducting computer developed with RIKEN
EvidenceDisclosed: Fujitsu’s release with RIKEN describes the 256-qubit machine, its chip and sample-package design and the 1,000-qubit plan.
How we knowDisclosed The company’s own filing, release, annual report, product page or investor record describes the quantum-computing role. Where customers are unnamed, the listing says so.
Primary sourceFujitsu — supporting disclosure
Company or official disclosure; vendor claims are attributed to their source.
Checked. This is the research review date, not the source publication or quote time.

Keep in perspective

The chip is developed jointly with RIKEN at their collaboration center, and Fujitsu does not report quantum revenue. Whether the 1,000-qubit machine was installed in 2026 is not confirmed by the cited sources.

Diversified business exposure. This describes the breadth or role of the business; it is not an investment rating. A quantum-computing product, design-in or partnership does not by itself establish material quantum revenue, market share, or future returns.

Connections to the assembly

These links explain the technology relationship. The model is illustrative and does not represent an actual manufacturer’s bill of materials.

Qubit chip

A silicon die patterned with about a hundred superconducting transmon qubits, the tunable couplers between them and a readout resonator for each. The quantum state lives in these circuits.

Scope of the company links: The qubit die. Makers that design and fabricate their own superconducting chips come first: IBM (Nighthawk links 120 qubits with 218 tunable couplers; wafers made at a 300 mm facility in Albany, where its company Anderon runs a pure-play quantum wafer foundry), Google (105-qubit Willow from its Santa Barbara fab), Rigetti (Fab-1, chiplet-based Cepheus systems, Novera QPUs sold to others), IQM (chips from its own clean room), D-Wave (superconducting annealing QPUs whose wafers SkyWater makes), AWS (the Ocelot cat-qubit prototype) and Fujitsu (a 256-qubit chip co-developed with RIKEN). IonQ is mapped only because it has owned SkyWater, D-Wave’s wafer foundry, since July 31, 2026. GlobalFoundries (a quantum foundry business launched in May 2026 with photonic, ion-trap and spin-qubit partners, developing superconducting processes) and STMicroelectronics (Quobly’s silicon spin-qubit devices in Crolles) are foundries, and Intel’s 12-qubit Tunnel Falls is a silicon spin chip. Trapped-ion, neutral-atom and photonic machines use different hardware and sit under makers. QuantWare, Oxford Quantum Circuits, Quobly and Qolab are private; research fabs such as imec and MIT Lincoln Laboratory are not companies and are not mapped.

Sample package

A gold-plated copper enclosure holding the chip, a circuit board, wire bonds and microwave launches. It thermalizes the chip at the mixing chamber and connects it to the coaxial lines.

Scope of the company links: The gold-plated copper sample package with its PCB, wire bonds and microwave launches is usually designed in house by qubit makers. Fujitsu is mapped because its release with RIKEN shows the 256-qubit chip in a sample package built for their 3D connection structure (Apr 2025). QuantWare (private) sells packaged QPUs and VIO packaging services. No listed maker of qubit sample packages is documented in the sources captured; generic machining, plating and PCB suppliers are not mapped, and Kyocera’s documented quantum work concerns sapphire substrates, not packages.

Related research

Companies with overlapping sector exposure. Their products and evidence may differ; this is not a list of equivalent investments.

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