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Partnership Between Fujitsu and Osaka University to Create Fault-Tolerant Quantum Computers

Osaka University and Fujitsu reported the setting up of the Fujitsu Quantum Computing Joint Research Division as a collaborative research program at the Center for Quantum Information and Quantum Biology (hereinafter QIQB) of Osaka University.

Partnership Between Fujitsu and Osaka University to Create Fault-Tolerant Quantum Computers.

Image Credit: Yurchanka Siarhei

The newly setup research division will concentrate on the creation of foundational technologies for fault-tolerant quantum computers, which can carry out accurate calculations while rectifying errors that happen in quantum bits (qubits).

These efforts will be based on the individual strengths of the two partners, integrating the advanced quantum error correction and quantum software technologies of QIQB with the applied knowledge in computing and quantum technologies of Fujitsu.

The goal of QIQB and Fujitsu is to create quantum software for fault-tolerant quantum computers with up to several thousand qubits as well as technologies to validate its error rectifying operations.

In the years ahead, the two partners will reinforce their collaboration in R&D toward the accomplishment of fault-tolerant quantum computing technologies to invent solutions to complex societal difficulties using quantum technology.


Quantum computers, which utilize the principles of quantum mechanics, including quantum entanglement (Note 1) and quantum superposition states, offer the possibility to someday transform computing, considerably surpassing the capabilities of present-day computing technologies to conduct high-speed calculations.

Fault-tolerant quantum computing, capable of precise and mass high-speed calculations using error correction algorithms, may become a vital technology particularly in the domains of finance and drug discovery, which require technology capable of solving complex and large-scale issues at high speed.

In March 2020, Osaka University set up QIQB to boost quantum information and quantum biology research, concentrating on research in a broad range of fields spanning from quantum computing, quantum information devices, quantum measurement and sensing, quantum information fusion, quantum communications and security and quantum biology.

QIQB has also been selected as the focal point for quantum software research in the domain of quantum technology of the COI-NEXT program (Note 2) of the Japan Science and Technology Agency (JST) and therefore has a crucial role to play in Japan’s strategy for the quantum technology revolution.

Collaborating with overseas and domestic research institutes, Fujitsu has been involved in massive research and development of quantum computing since 2020, aiming to further enhance the capabilities of computing technologies.

Making use of its quantum-inspired computing (Note 3) solution "Digital Annealer", which is engineered to solve mass combinatorial optimization issues, Fujitsu is offering customers solutions in different fields like logistics and drug discovery.

In October 2020, Fujitsu began cooperative research (Note 4) with Osaka University on quantum error rectification. The setting up of the "Fujitsu Quantum Computing Joint Research Unit" will additionally support R&D in fault-tolerant quantum computer systems.

Outline of the Joint Research

  1. Name: Fujitsu Quantum Computing Joint Research Division
  2. Research Period: October 1, 2021, to March 31, 2024
  3. Location: Center for Quantum Information and Quantum Biology (QIQB), International Advanced Research Institute (IARI), Osaka University (Toyonaka City, Osaka Prefecture)
  4. Research Contents: R&D of Quantum Software for fault-tolerant quantum computers

*Assuming a quantum computer possessing a scale of several thousand qubits, the joint division will analyze and create an error correction code able to reinstate the original data from faulty qubits, as well as technologies to assess the working of this algorithm.

*In order to carry out quantum computation using logical qubits (Note 5) produced through quantum error correction codes, the joint division will concentrate on the R&D and execution of a set of software solutions required from program input to the result output.

Regarding future practical applications of this technology, the division will additionally validate the operation of these solutions using a virtual machine environment to assess the impacts of noise add up.

Roles and Responsibilities

Osaka University

  • Contribution to boosting R&D in the field of quantum error correction technology on a scale of several thousand qubits based on its expertise in quantum error correction technology
  • Designing of a set of software required for carrying out quantum computation using logical qubits and confirm its application in a virtual machine


  • Creation of quantum error correction algorithms for quantum computers on a scale of several thousand qubits based on its knowledge in computing
  • Designing of a set of software required for carrying out quantum computation using logical qubits; application of the software to a virtual machine and confirmation of its process

Future Plans

With the purpose of contributing to the additional development of quantum computing science and technology, Osaka University and Fujitsu will reinforce their cooperation with a range of companies and research institutions. Through the practical application of the findings of this combined research, the partners aim to add to an early real-world application of quantum computing with the potential to stimulate innovations and develop a sustainable society.

Osaka University and Fujitsu will also work together with connected industries and academia to assist in the training of new human resources in the quantum technology domain.

All company or product names stated here are registered trademarks or trademarks of their respective owners. Information given in this article is accurate at the time of publication and is subject to change without advance notice.


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