About
NTT (Nippon Telegraph and Telephone) develops quantum networking and quantum computing services through its quantum research programs. The work centers on quantum communication networks, quantum key distribution systems, and quantum internet infrastructure, along with research into quantum computing technologies, quantum-safe communication services, and quantum network protocols to support secure communications and distributed quantum computing across Japan's telecommunications infrastructure. In November 2025, NTT launched the OptQC initiative with Fujitsu and other Japanese partners to develop room-temperature optical quantum computers, with the consortium aiming for practical optical quantum computing systems built on Japan's photonics expertise. NTT also partnered with the Australian startup OptQC to jointly develop optical photonic quantum computers targeting 1 million qubits by 2030. NTT's research demonstrates advances in continuous-variable quantum computing, and it has shown quantum entanglement generation 1,000 times faster than conventional methods. In November 2025, NTT researchers, with Cornell University and Stanford University, demonstrated the first programmable nonlinear photonic waveguide, published in Nature, enabling reconfigurable photonic quantum processing. The work was carried out through NTT's PHI Lab. NTT DOCOMO deployed D-Wave quantum annealing for mobile network base station optimization, achieving a 15% gain in mobile network performance across the Tokai, Chugoku, and Kyushu regions, completing a 40-second optimization task that would take 27 hours classically, with production deployment planned. NTT Research launched the ZTDS quantum-resistant security suite. During 2025, NTT expanded its IOWN initiative with quantum-secured communications, advanced quantum repeater research for long-distance quantum networks, and took part in implementing Japan's national quantum technology strategy. Update 2026-04-15: NTT and collaborators develop
Quantum Specifications
| Quantum Focus | hardware |
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