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NEC has been involved in superconducting quantum computing research since the technology's earliest days. In 1999, NEC researchers demonstrated the world's first superconducting solid-state qubit, which became a foundation of superconducting quantum computing. Variations of this technology are now being used by Google and IBM to build their quantum computers. However, it turns out that the Japanese technology giant quietly ended development of physical quantum computing machines in March 2026, and many of its researchers subsequently moved to rival Fujitsu.
Despite its historical role, NEC has apparently concluded that developing commercial quantum computing hardware will take too long to generate adequate returns. As a result, the company quietly discontinued development of quantum computing machines at the end of March, according to Diamond . A number of researchers involved with the program — reportedly including a key research leader — have since moved to Fujitsu, which continues to invest heavily in superconducting quantum computing hardware.
Meanwhile, NEC does not formally characterize the move as a withdrawal from quantum computing. In response to Diamond , the company declined to comment on whether it had exited quantum computer development and said that it continues to evaluate practical applications and industrialization of quantum technologies as well as conduct proof-of-concept projects with customers. Therefore, the move appears to represent an exit from development of actual quantum computers rather than from quantum technology altogether. NEC can continue working on quantum applications, software, algorithms, and customer projects without assuming the cost and risks associated with designing and building quantum processors and complete quantum computing systems.
For Fujitsu, the arrival of experienced NEC researchers could strengthen an already advanced superconducting quantum computing operation. Last year Fujitsu and Riken launched a 256-qubit superconducting quantum computer and have been working toward a machine with more than 1,000 qubits in 2026 . In addition, Fujitsu has outlined plans to develop systems exceeding 10,000 superconducting qubits by fiscal 2030 .
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Reference reading
- https://www.tomshardware.com/tech-industry/quantum-computing/SPONSORED_LINK_URL
- https://www.tomshardware.com/tech-industry/quantum-computing/nec-has-quietly-quit-quantum-computing-hardware-development-report-claims-company-says-it-will-continue-to-evaluate-practical-applications-and-industrialization-of-quantum-technologies#main
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