Nakagawa Planning Construction provides comprehensive consulting services to assist in the development of polluted land through safe soil pollution removal, cleaning and restoration methods.

*Liquid soil purifier
Natural ingredients such as water, enzymes and plant activated carbon are used to ensure environmental safety. Safe for the neighbors, safe for the worker.

Whether the existing water pipe is round, box culvert or arch culvert, Nakagawa Planning Construction’s spiral-wound pipe renewal technology is the right fit.

At Nakagawa, versatile cross-section SPR is used, a new development for restoring odd-shaped pipes.

Construction does not require opening the pipe, and Nakagawa SPR is compatible with all types of culvert shapes. Regardless of the length or grade, versatile cross-section SPR restores the water carrying capacity.

Versatile cross-section SPR: Responding to the needs of the next generation of waterworks, flexibly and dynamically.