Fujitsu
Japanese IT conglomerate whose quantum-computing programme runs out of the RIKEN RQC-Fujitsu Collaboration Center (Wako, Saitama; established April 2021) with RIKEN and NTT. The joint group built Japan's first domestically developed superconducting quantum computer (64 qubits, October 2023), followed by a 256-qubit machine (April 2025), with a 10,000-plus-qubit / 250-logical-qubit system targeted for FY2030 under NEDO's Post-5G programme. Funding spans MEXT Q-LEAP, Cabinet Office Moonshot Goal 6, and NEDO. The separately marketed "Digital Annealer" is quantum-inspired CMOS hardware, not a quantum computer.
Timeline
Current flagship
RIKEN/Fujitsu 256-qubit superconducting quantum computer — transmon, 3D vertical-wiring lattice (4-qubit unit cells); deployed in Fujitsu's hybrid quantum computing platform from Q1 FY2025
Milestones
- 2026-03Fujitsu and University of Osaka publish new error-impact-reduction techniques for chemical-material energy calculations on early-FTQC quantum computers (STAR architecture)
- 2025-08Fujitsu starts official development of a 10,000-plus-qubit superconducting quantum computer (250 logical qubits) targeting FY2030 completion; backed by NEDO Post-5G programme; partners include AIST, RIKEN, Osaka University, Delft/QuTech
- 2025-05Keysight Quantum Control System selected as the qubit-control electronics for the Fujitsu/RIKEN 256-qubit system
- 2025-04Fujitsu and RIKEN unveil 256-qubit superconducting quantum computer at the RIKEN RQC-Fujitsu Collaboration Center; high-density 3D implementation in single dilution refrigerator; integrated into hybrid quantum computing platform in Q1 FY2025
- 2024-08Fujitsu and Osaka University publish STAR — a "space-time efficient analog-rotation" early-FTQC architecture aimed at running useful algorithms on a few-hundred-logical-qubit machine
- 2024-06Fujitsu to install a superconducting quantum computer system at AIST's G-QuAT facility (Tsukuba) — second instance of the 64-qubit-class hardware
- 2024-03RIKEN/Fujitsu/NTT/Osaka/AIST joint quantum-computing platform receives MEXT Prime Minister's Award for Science and Technology
- 2023-12Japan's third quantum computer launched at Osaka University (64-qubit-class system based on the RIKEN/Fujitsu architecture)
- 2023-10Fujitsu and RIKEN announce a 64-qubit superconducting quantum computer at the RQC-Fujitsu Collaboration Center; NTT contributes qubit-control software; hybrid quantum computing platform launched for joint-research partners
- 2023-03Japan's first domestically built superconducting quantum computer goes online at RIKEN (64 qubits; MEXT Q-LEAP-funded; precursor to the Fujitsu collaboration machine); cloud service launches via the joint research group
- 2021-04RIKEN RQC-Fujitsu Collaboration Center established at RIKEN Wako Campus
Roadmap
- 2026 1,000-qubit superconducting system installed in a new building at Fujitsu Technology Park (Kawasaki) source ↗
- FY2030 10,000-plus physical-qubit superconducting system operating with 250 logical qubits, using Fujitsu's STAR early-FTQC architecture; NEDO Post-5G programme funded through FY2027 source ↗
- FY2035 1,000 logical qubits via integration of superconducting and diamond-spin qubits (with Delft/QuTech collaboration) source ↗
Capability details
Quantum computing
- Qubit type
- transmon
- Physical qubits
- 256
- Logical qubits
- 0
- 1Q gate fidelity
- —
- 2Q gate fidelity
- —
- T₁
- —
- T₂
- —
- EC code
- —
- Connectivity
- 3D vertical-wiring lattice; qubits arranged in 4-qubit unit cells (256-qubit system)
8 unverified fields
-
modalities.qc.one_q_fidelity -
modalities.qc.two_q_fidelity -
modalities.qc.coherence_t1_ms -
modalities.qc.coherence_t2_ms -
modalities.qc.ec_code -
modalities.qc.gate_set -
modalities.qc.connectivity— 3D vertical-wiring lattice with 4-qubit unit cells described in vendor press for the 256-qubit system; no peer-reviewed architecture paper yet cited -
shareholders— Only the top two shareholders (both trust-bank custody accounts) are surfaced from Fujitsu IR as of 9 May 2025; underlying beneficial owners not disclosed at this level. Cross-check next annual securities report (yuka shoken hokokusho) for finer breakdown.
People
- Takahito Tokita — Representative Director, President & CEO (Fujitsu Limited) (since 2019-06) ↗
- Vivek Mahajan — EVP, CTO & Head of System Platform (Fujitsu Limited) (since 2021-07) ↗
- Yasunobu Nakamura — Director, RIKEN RQC-Fujitsu Collaboration Center (and Director, RIKEN Center for Quantum Computing) (since 2021-04) ↗
References
- press https://www.riken.jp/en/news_pubs/news/2025/20250422_1/index.html RIKEN press release — 256-qubit superconducting quantum computer (April 2025)
- press https://global.fujitsu/en-global/pr/news/2025/08/01-01-en Fujitsu press — official development start of 10,000-plus-qubit system targeting FY2030 (Aug 2025)
- press https://info.archives.global.fujitsu/global/about/resources/news/press-releases/2023/1005-01.html Fujitsu/RIKEN press — 64-qubit superconducting system + hybrid quantum computing platform launch (Oct 2023)
- press https://info.archives.global.fujitsu/global/about/resources/news/press-releases/2023/0324-01.html Japan's first homemade 64-qubit superconducting quantum computer cloud-service launch (March 2023; MEXT Q-LEAP)
- press https://www.riken.jp/en/research/labs/rqc/riken_fujitsu/index.html RIKEN RQC-Fujitsu Collaboration Center — establishment and scope (April 2021)
- press https://resou.osaka-u.ac.jp/en/research/2024/20240828_1 Fujitsu/Osaka University STAR early-FTQC architecture (Aug 2024)
- press https://www.keysight.com/us/en/about/newsroom/news-releases/2025/0515-pr25-073-keysight-quantum-control-system-embedded-within-fujitsu-and-rikens-world-leading-256-qubit-quantum-computer.html Keysight QCS selected as qubit-control electronics for the 256-qubit system (May 2025)
- blog https://global.fujitsu/en-global Fujitsu product page — Digital Annealer described as "quantum-inspired" architecture; emulates qubits in a classical digital circuit, runs at room temperature. Listed for completeness; NOT a quantum computer.