Japan Unveils First Homegrown Quantum Computer: Technological Independence Advances.

Osaka University in Japan

Japan's first superconducting quantum computer, made of local parts and software, was launched by the University of Osaka. The Osaka University Centre for Quantum Information and Quantum Biology revealed the technology on July 28, 2025. This suggests Japan can design, develop, and integrate a cutting-edge quantum system for quantum computing without foreign technology.

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Its wide domestic origin makes this quantum computing effort stand out. Researchers used only domestic technologies to build the quantum computer.

Superconducting qubit chips, control device, dilution refrigerator, and quantum cloud software are all Japanese-made. In the latest model, domestically made components have replaced imported parts like the dilution refrigerator, pulse tube refrigerator, low-noise power supply, cryogenic amplifier, filter, infrared absorber, and magnetic shield. This independence removes supply chain constraints and allows customised system optimisation.

Cryogenic Engineering and Advanced Hardware

Qubits and quantum phenomena like superposition and entanglement distinguish superconducting quantum computers from classical computers. Cooling qubits to -273.14°C (10mK) is necessary for superconductive computers. A pulse tube refrigerator cools the gadget to 4K, and a dilution refrigerator lowers it to 10mK. These critical cryogenic components were installed at the University of Osaka in March 2025 as part of the Moonshot Research and Development Program by ULVAC and ULVAC Cryogenics.

The Moonshot Research and Development Project's home control gadget from QuEL, Inc. uses microwaves to control superconducting qubits. Since July 28, 2025, the institution has control devices that can manage over 28 qubits. RIKEN supplies chips for this device, such their 144-qubit computer. As of early July, eight qubit calibration and a two-qubit quantum entangled state demonstration were complete, and cloud connection testing confirmed the service's usability.

Strong Open-Source Software Ecosystem

Hardware innovation is matched by a great software environment. The whole software stack—including back-end control mechanisms and front-end user interfaces—is open-source. This vast software suite is called OQTOPUS, or Open Quantum Toolchain for Operators and Users. QURI Parts are used for quantum circuit software, whereas OQTOPUS connects front-end, cloud, and back-end layers.

Open-source software components include quelware for control device software, e7awg_sw for FPGA software, qubex for pulse experiment software, qubecalib for microwave processing, and QDash for automatic large-scale pulse experiments. This unrivalled commitment to open-source development is expected to attract a large number of developers, promoting sustainable development.

Strong Open-Source Software Ecosystem

This groundbreaking study was led by Vice Director/Professor Makoto Negoro of QIQB of the University of Osaka and other leading Japanese institutions and business executives. e-trees.Japan, QuEL, QunaSys, Systems Engineering Consultants (SEC), TIS, Fujitsu Limited, RIKEN, ULVAC, and ULVAC Cryogenics are major partners. Famous Japanese agencies including the Cabinet Office, Japan Science and Technology Agency, and Ministry of Education, Culture, Sports, and Science and Technology have provided crucial financing.

Quantum computers could transform several scientific and industrial domains. Through novel materials and medications, optimisation, and practical technologies for daily life, like machine learning, they may solve problems that traditional computers cannot and reduce the global environmental burden. Unlike other private sector teams that have achieved 50-qubit control, this discovery shows that Japan possesses the technology to build and combine quantum computers. Public sector system integration occurred.

Public Engagement at Expo 2025

From August 14–20, Expo 2025 Osaka, Kansai, Japan, will display components of this groundbreaking quantum computer to demystify quantum research and engage a wide audience. This extraordinary show, “entangled moment – [quantum | earth | universe] x art,” will be at Expo Show Centre “WASSE”. The cloud-connected terminals across the site will allow guests to experience quantum computing and run basic quantum programs. The display will show how iPad signals reach the qubit, refrigerator, and University of Osaka.

The exhibit has quantum computer-generated artwork and a device that enables visitors experience quantum entanglement. It also partners with Tama Art University Professor Akihiro Kubota to merge science and art. A multiplayer game and quantum theory learning program will use real-time randomised numbers from the Quantum Processing Unit (QPU) to make quantum technology fun for everyone. Before the Expo, quantum researchers and industry leaders will attend a pre-Expo display and experience session on July 28.

This will let several visitors watch up to four qubits operate simultaneously. This locally built system will be linked to the cloud during the unique show, and qubits will rise afterward. The third gadget that inspired this new computer will also run at the Expo to maximise entanglement moments.