Maximize the Power of Quantum Computing
QunaSys builds technology for quantum computing to achieve its full
potential through our algorithm development to product
engineering.
We will continue our R&D for a future where quantum computers can be
used as a disruptive tool in industries such as materials,
chemistry, drug discovery, and many more.
OUR CURRENT FOCUS
Quantum Chemical Calculations
Our world is full of chemical phenomena that remain unexplained even with the aid of the world's best supercomputers. Elucidating a phenomenon requires a great deal of time, cost, and repeated trial and error in experiments.
As Richard Feynman once said—
Nature isn’t classical, and if you want to make a simulation of
nature, you’d better make it quantum mechanical.
For simulating these phenomena of interest, often caused by quantum mechanical behavior of electrons and atomic nuclei, it is most natural to develop a quantum computer, a computer that works on the principle of quantum mechanics.
QunaSys is working on quantum algorithm and software R&D, aiming to create innovative novel materials through solving the enigmas of the chemical world using quantum computers.
- 2023/08/24
CEO Tennin Yan Honored in Forbes JAPAN 30 UNDER 30 2023 for Science, Technology & Local Achievement READ MORE
SERVICES

Qamuy
CLOUD SERVICES
Qamuy is a cloud service that enables users to easily perform quantum chemical calculations on quantum computers without having specialized expertise in quantum algorithms. In addition to running calculations to quantum computers,it also providing high-speed simulators

Research collaboration
RESEARCH
We support companies that are proactive with research and development of quantum computers to help solve their challenges. We work closely to assess each client’s needs, such as benchmarking with simulators or current quantum computers, estimating the computing resources required, building a proper workflow, and developing new algorithms.

Research grant projects
RESEARCH
QunaSys participates in large national projects involving quantum technology. The results of those projects will be reflected in our joint research and softwares.
OTHER SERVICES
QPARC
Corporate consortium utilizing quantum computers
Learn deeply about quantum computer hardwares and algorithms through lectures and exercises.
→ QPARC
Quantum Native Dojo
Self-study materials for beginners
Self-study material that aims to expand the number of researchers and engineers involved in quantum technology.
Qulacs
Quantum circuit simulator
Qulacs is a high-speed simulator of quantum circuits for quantum computing research written in C ++, and can be used through the Python interface.
Quantaggle
Quantum algorithm benchmark site
Benchmark results obtained by various quantum algorithms.
QunaSys Tech Blog
Quantum Computing Technology Blog
Blogs about quantum algorithm developments written by QunaSys engineer and researchers.
TECHNOLOGY
Using quantum algorithms, industrial applications can be translated into sets of quantum computational operations, described by quantum circuits.
Quantum circuits can be run on any type of universal quantum computing hardware by being converted, or compiled, for the specific gate set supported by the hardware.
Developing quantum algorithm is essential for preparing to take advantage of practical quantum hardware when it becomes available. QunaSys is developing various quantum algorithms and compilers for use in the quantum computers in the future.
ABOUT US

QunaSys is a startup company aiming to make quantum computers widely used in society, by conducting research on algorithms that make good use of quantum computers and developing software that enables users to easily use those algorithms.
- 2023/08/26
Classical variational optimization of PREPARE circuit for quantum phase estimation of quantum chemistry Hamiltonians - 2023/08/07
Variational quantum algorithm for ergotropy estimation in quantum many-body batteries - 2023/07/28
Demonstrating Quantum Computation for Quasiparticle Band Structures
- 2023/08/24
CEO Tennin Yan Honored in Forbes JAPAN 30 UNDER 30 2023 for Science, Technology & Local Achievement - 2023/08/04
Development of an Efficient Method for Computing the Green's Functions of Large-Scale Electronic Systems ~ A Steady Step Toward the Application of Quantum Computers to Strongly-Correlated Electrons ~ - 2023/07/18
QunaSys releases QURI, quantum chemistry calculation cloud service
We are hiring talented scientists, researchers, and programmers for full-time and for interns.
We’re currently hiring for these positions.
We’re located in Bunkyo, Tokyo in Japan. For questions and inquiries, feel free to contact us info@qunasys.com