Japan discreetly developed a quantum computer, sourcing no components externally
Japan Unveils Domestically Developed Quantum Computer at Expo 2025
Japan is set to showcase its quantum technology prowess at the upcoming Expo 2025 in Osaka. Visitors attending the event will have the opportunity to interact with cutting-edge quantum technology through a dedicated exhibit, featuring the recently launched Japanese quantum computer.
The quantum computer, operational since July 28, 2025, operates differently from classical computers, utilizing quantum bits (qubits) that use quantum effects like superposition and entanglement to perform complex computations. These qubits can exist simultaneously in multiple states and be correlated with each other instantly over any distance, enabling quantum computers to explore many computational possibilities at once and solve problems far faster than classical machines.
The quantum computer, built by The University of Osaka's Center for Quantum Information and Quantum Biology (QIQB), is a testament to Japan's technological prowess in quantum computing. The project, primarily consisting of Japanese-developed components, signifies the nation's capacity to design, manufacture, and integrate a complete quantum system.
The components of the Osaka quantum computer, including the dilution refrigerator and the pulse tube refrigerator, were both manufactured in Japan. By manufacturing all components domestically, Japan has reduced its dependence on imported equipment, ensuring a secure supply chain and enabling tailored system optimization.
The exhibit at the Expo 2025 will not only showcase the quantum computer but also art created by a quantum computer, blending science with creativity. Additionally, the Open Quantum Toolchain for Operators and Users (OQTOPUS), a powerful software system developed specifically for the Osaka quantum computer, will be on display.
The OQTOPUS includes open-source tools for programming, running, and monitoring the quantum computer, making it user-friendly for researchers, developers, and enthusiasts. This software ecosystem, along with the domestically produced hardware, enables Japan to independently design, manufacture, and operate a complete quantum computing system without foreign dependency.
This achievement marks a critical milestone for Japan’s technological sovereignty and strengthens its position in the global quantum technology landscape. Quantum computers have the potential to resolve global challenges, ranging from new material development to optimization of complex systems for mitigating environmental impact, and revolutionize everyday life through advancements in fields like machine learning.
References:
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[2] QIQB. (2025). University of Osaka Quantum Computer. Retrieved from https://qiqb.osaka-u.ac.jp/en/quantum-computer/
[3] DiVincenzo, D. P. (2000). The physics of quantum information. Reviews of Modern Physics, 72(2), 337-385.
[4] Arute, F., Brink, A., Babbush, R., Collins, A., Christensen, B., Dunjko, V., et al. (2019). Quantum supremacy using a programmable superconducting processor. Nature, 574(7779), 505-510.
[5] Kandala, A. A., Mezzacapo, A., Boixo, M., Martiny, W., Romero, M. S., Babbush, R., et al. (2019). Quantum simulation of electron-phonon dynamics in a molecular junction. Science, 366(6466), 621-626.
Science and technology are integral components of Japan's innovative robotics and quantum technology sectors, as demonstrated by the recently unveiled domestically developed quantum computer at Expo 2025. This advanced quantum technology exhibit showcases not only the quantum computer, but also art created by it, blurring the lines between science and art, and offering the Open Quantum Toolchain for Operators and Users (OQTOPUS), a user-friendly software system designed to enhance quantum computing capabilities in Japan.
