Last updated 2026-07-02 · Part of the global quantum company directory
Japan's quantum effort runs through its scientific institutions and industrial conglomerates rather than venture-backed pure-plays. The national quantum strategy (2022, expanded since) and the Moonshot R&D program set a target of a fault-tolerant quantum computer by 2050, with staged milestones through the 2030s, and government-linked investment measured in the hundreds of billions of yen.
RIKEN anchors the hardware roadmap: it launched Japan's first domestically-built superconducting quantum computer in 2023 and, with Fujitsu, has scaled joint superconducting systems to 256 qubits with a 1,000-qubit generation planned. NTT is making one of the world's largest corporate bets on photonic and coherent-Ising computation through its IOWN program. IBM's Quantum System One in Kawasaki (with the University of Tokyo) and a Quantinuum presence give Japanese enterprises direct access to US/UK platforms. The startup layer — QunaSys, Jij, blueqat — is strongest in algorithms and software rather than hardware.
There is no Japanese pure-play quantum stock. Listed exposure means the conglomerates: Fujitsu (6702.T), NEC (6701.T), NTT (9432.T), Toshiba (6502.T, quantum key distribution) and Hitachi (6501.T, silicon qubits) — all of which treat quantum as one program among many. That makes Japan the clearest case of a major quantum nation whose market exposure is only available at conglomerate dilution.
Figures reflect public reporting as of the last-updated date and are refreshed periodically. Not investment advice.