iRIC V4 Exclusive Solvers
The full versions of these advanced solvers are available as a Gold Member benefit. Trial versions are available for everyone.

Cabernet2D
Comprehensive Aquatic Basin Evaluation Tool for River Network
Next-generation 2D solver integrating confluence/bifurcation, levee breach, vegetation lifecycle, and hydraulic structures, based on Nays2dH + Nays2dFlood.
View Details
Freebird 3D
Fully Responsive Engine for Evolution of Bathymetry and Improvement of River Design
3D open-channel flow model based on Nays3dV. Supports non-hydrostatic modeling, density currents, hydraulic jumps, and confluences.
View DetailsUrban Flood Model
Integrated river, sewer, and floodplain analysis—for urban flood risk assessment and expanding into sewer engineering services.
View DetailsThe following cases require separate consultation
- ・If you wish to hold an offline workshop at your company
- ・If you wish to request usage support, feature additions, or improvements to the exclusive solvers
- ・If you wish to access the solver source code
- ・If you wish to contribute to development
