About J-OCTA

About J-OCTA

J-OCTA is useful at the forefront of material research and development

J-OCTA is a material property analysis software that predicts material properties from atomic scale to micrometer scale on a computer when developing a wide range of materials such as rubber, plastics, thin films, paints and electrolytes. It can be used as a knowledge discovery tool to understand complicated phenomena and physical properties which could not be grasped only by experiment results. We will support state-of-the-art material design and material development by linking and operating simulators corresponding to each scale on a common platform.

Structure of J-OCTA

J-OCTA, except for VSOP, uses the computational engine of OCTA (an open source program). The software's functions require the J-OCTA platform, except for the QSPR-only version, which does not require it.

  • J-OCTA platform
    - Molecular orbital method interface
    - Analysis example database
  • SIESTA Interfacial energy Tool
  • SIESTA modeler
  • COGNAC modeler (Coarse-grained molecular dynamics modeler)
    - Including DPD (Dissipative Particle Dynamics) modeler
  • VSOP (parallel molecular dynamics engine)
  • PASTA & NAPLES modeler (Rheology modeler)
  • SUSHI modeler (Dynamical mean field modeler)
  • MUFFIN modeler (Multi-phase structure modeler)
  • Reverse mapping function
  • Solubility coefficient estimation function
  • Function for estimating χ parameters from phase diagrams
  • KRI-NIWA(High accurate group contribution method)
  • QSPR (Quantitative Structure-Property Relationship)
  • ML-QSPR (Machine learning based Quantitative Structure-property Relationships )
  • Modeling API (High throughput calculations)

Structure of J-OCTA Structure of J-OCTA

J-OCTA Student Edition

The J-OCTA Student Edition is a free software that consists of the basic functions from the J-OCTA advanced simulation system, and it is useful for small calculation and/or validation. Anyone can use the student edition for free and without any license application and/or registration. The J-OCTA Student Edition is useful as both the atomistic molecular modeling tool for J-OCTA simulations and as a support tool for your analyses. You also can try to evaluate the capability of J-OCTA as a provisional test prior to the formal introduction.

See more details for the J-OCTA Student Edition >>



J-OCTA is the commercial version of the integrated simulator for soft materials, called "OCTA," that was developed through an industry-university cooperative project. OCTA is open-source software.
See more details for OCTA >>


SIESTA is open source Density Functional Theory (DFT) software developed by a group including Universities mainly in Spain. SIESTA is a registered trade-mark of SIMUNE.
SIMUNE Website >>
SIESTA Open Source Software Website >>


Assistance in initially launching J-OCTA analyses Assistance in initially launching J-OCTA analyses

Customers with a support contract will be provided with support services from specialist staff via email. Assistance in initially launching J-OCTA analyses will be provided. JSOL provides seminars and training workshops that cover topics ranging from the basic theory to actual operations.

See more User Support >>

Commissioned and consulting business

JSOL provides a simulation commission service to support OCTA/J-OCTA usage that includes estimating the physical properties of soft materials, primarily resin or rubber polymer materials, and understanding the material mechanisms.

The commission service is a comprehensive service that includes a preliminary survey, modeling, input data generation, simulation, and analysis of the simulation result. JSOL provides the input data used for the simulation along with the final report.

Customized service for OCTA/J-OCTA can also be provided.

Please contact us for details.

Contact >>

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