Japan switches on Shunkai, its first full-stack neutral-atom quantum computer

Verdict: MONITOR

IMS integrated Hitachi’s software stack with an Infleqtion QPU in an operating research system that starts near 50 qubits—but disclosed no measurements of how accurately or reliably it operates, nor any error-correction or application-performance result.

Reviewed, edited and approved by Joerg Germann, Editor · Editorial method

Quantum Litmus provides independent editorial analysis, not investment advice.

Holdings disclosure: Holdings confirmed 5 October 2026: the editor personally holds shares in IONQ, IQMX, NVDA, PSQL, QBTS, QUBT, RGTI, and XNDU.TO. Backloop Technology holds none. These holdings did not determine selection or the readiness judgment. About this report.

This is editorial analysis, not investment, procurement or engineering advice.