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.


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.

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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


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


QunaSys participates in large national projects involving quantum technology. The results of those projects will be reflected in our joint research and softwares.



Corporate consortium utilizing quantum computers

Learn deeply about quantum computer hardwares and algorithms through lectures and exercises.


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.

Quantum Native Dojo


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.

Qulacs: Github


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.

QunaSys Tech Blog


  • IonQ
  • IBM
  • Microsoft
  • PsiQuantum


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.


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.