Japan achieves Quantum Computing Milestone with Fully Domestic System
Japan has taken a significant leap forward in the global quantum computing race,successfully developing and integrating a fully domestically-produced quantum computer. This achievement, spearheaded by researchers at Osaka University and the Quantum Innovation Research Institute (QIQB), demonstrates Japan’s capability to compete with leading international efforts – and uniquely positions the nation as a public sector leader in this critical technology.
For years, quantum computing has been touted as a revolutionary technology with the potential to reshape industries from drug finding to materials science and artificial intelligence. While private companies in the US and Europe have demonstrated control over 50+ qubits, Japan’s accomplishment stands out by achieving full system integration within the public sector, coupled with a commitment to open-source software development.
Building a Quantum Ecosystem from the Ground Up
The newly developed quantum computer isn’t reliant on foreign components. As illustrated in Figure 2, a remarkable percentage of the system’s parts are domestically sourced, showcasing a robust and growing Japanese quantum technology supply chain. This independence is crucial for long-term innovation and security.
The software powering this quantum system is equally noteworthy. Figure 3 highlights the open-source software stack, published on GitHub, fostering collaboration and accelerating development within the broader quantum computing community. This open approach is unprecedented and aims to establish a collaborative testbed for companies eager to explore the potential of quantum computing.
Performance and Early Applications
Currently, the system boasts the ability to control up to 50 qubits, with ongoing experiments achieving notable gate fidelities – 99.9% for single-qubit gates and up to 98% for two-qubit gates, with a median of 96%. These metrics are critical for reliable quantum computation.The system is already being actively utilized. QIQB is working with the Quantum Software Consortium, comprised of 40 institutions, to explore real-world applications. Participants are gaining access to cloud-based quantum resources, starting with four qubits and scaling up to 42 as of july 18th. Figure 4 details the system’s performance over time, showcasing increasing qubit availability and usage. A remarkable 86% availability rate was maintained throughout May and June.
A Publicly Accessible Quantum Future
The impact of this research extends beyond the laboratory. Japan is committed to making this technology accessible. Visitors to Expo 2025 Osaka, Kansai, Japan (August 14-20) will have the opportunity to interact with the system firsthand, experiencing the operation of quantum algorithms with up to four qubits.Following the Expo, the system will be integrated into the Moonshot Research and Development Project, Goal 6, led by Tsuyoshi Yamamoto, to facilitate crucial verification tests of quantum error correction techniques. This collaborative effort will further refine the system and pave the way for more complex quantum computations.
Implications for Industry and Beyond
This achievement signifies more than just a technological breakthrough. It positions Japan to become a central player in the emerging quantum industry. Quantum computers promise to revolutionize fields like:
materials Science: Discovering novel materials with enhanced properties.
Drug Discovery: Accelerating the identification and development of new pharmaceuticals.
Optimization: Solving complex logistical and financial problems.
Machine Learning: Developing more powerful and efficient AI algorithms.By fostering a collaborative ecosystem and prioritizing open-source development, Japan is laying the foundation for a future where quantum computing benefits society as a whole. This isn’t just about building a faster computer; it’s about building a better future.