June 04, 2026 -- As the industrialization of quantum computing accelerates worldwide, the advancement and stable procurement of optical core components and materials that fundamentally underpin system performance have become critical challenges — beyond the development of quantum processors alone. In cold-atom (neutral atom) quantum computers in particular, high-performance optical devices are essential at every stage — atom trapping, cooling, manipulation, and readout — and the development of integrated modules such as optical engines combining these functions has emerged as a key enabler for the industrialization of quantum computing.

Yaqumo Inc. is developing a scalable Ytterbium (Yb)-based neutral atom quantum computing architecture. NKT Photonics A/S possesses world-leading expertise in advanced laser systems and fiber laser technology. Hamamatsu Photonics K.K. is a global leader in the development and manufacture of advanced imaging technologies for photodetectors, including ultra-high-sensitivity cameras capable of detecting signals at the single-photon level.

The three companies have signed a Memorandum of Understanding (MoU) on advanced optical systems aimed at the industrialization of quantum computing. Through this MoU, the three companies aim to pursue joint research and development, industrialization of advanced optical systems for cold-atom quantum computing, and the establishment of a global supply chain.

Framework for Collaboration

This MoU establishes a framework for the three companies to explore joint research and development, industrialization of modules, and the building of a global supply chain in the domain of optical core components and materials essential to the industrialization of quantum computing.

Leveraging their respective expertise in quantum computing hardware, laser technology, and photodetection and imaging technology, the three companies will deepen mutual understanding and pursue future collaboration spanning from the development of advanced optical devices to the industrialization of integrated systems.

International Cooperation

This MoU is positioned as a concrete private-sector initiative under the Memorandum of Cooperation on quantum science and technology between Japan and Denmark signed in 2025 (), advancing bilateral collaboration in advanced technology fields including quantum technology.

The signing ceremony of this MoU was held in the presence of Mr. Jingo Kikukawa, Director-General of the Innovation and Environment Bureau at the Ministry of Economy, Trade and Industry (METI), and H.E. Mr. Jarl Frijs-Madsen, Ambassador Extraordinary and Plenipotentiary of the Kingdom of Denmark to Japan, symbolizing the advancement of quantum computing industrialization grounded not only in private-sector collaboration but in intergovernmental cooperation.

Through this collaboration, Japan is expected to build a robust supply chain of optical core components for its quantum computing industry, while Denmark is expected to achieve industrial growth and employment creation by positioning itself at the core of the global quantum industry supply chain.

Outlook

Yaqumo, NKT Photonics, and Hamamatsu Photonics will combine their respective strengths in quantum computing hardware, laser technology, and photodetection, imaging technologies to contribute to the technological advancement of quantum computing industrialization and to strengthen international cooperation in quantum technology between Japan and Denmark.