• [MIAC] Fire Service Act Dangerous Items Facility-Use Flexible Tube Coupling Performance Rating
• [METI] Electricity Business Act Welding Certified Factory
• [JWWA] Inspection Certified Factory
• [MIAC] Fire Service Act Dangerous Items Facility-Use Flexible Tube Coupling Performance Rating
• [HPGSIJ] Welding Certified
• [MHLW] Class 1 Pressure Vessel Manufacturing Certified Factory, Boiler Vessel Certified Factory
• [ClassNK] Shipboard Machine Use Approved
• Eco Action21
• [NKKKQA] ISO9001 (JIS Q9001)

“The unbroken passing down of the artisanal skills of tubemaking/forming/welding”. This is the foundational mission of our Manufacturing Department.
We are committed to a detailed training curriculum for each individual person’s skill improvement.

From welding to plastic working, these are the employees of each association, adopting the most up-to-date information.

• Public Interest Incorporated Foundation – Japan Water Works Association
• Public Interest Incorporated Foundation – Japan Sewage Works Association
• General Incorporated Association – Federation of Japan Water Industries, Inc.
• Public Interest Incorporated Foundation – Japan Water Research Center
• Japan Water Works Steel Pipe Association
• SDF Engineering Association
• General Incorporated Association – Japan Society for Technology of Plasticity
• General Incorporated Association – Society of Piping Engineers
• General Incorporated Association – Thermal and Nuclear Power Engineering Society
• General Incorporated Association – Osaka Welding Engineers Society
• General Incorporated Association – Vacuum Society of Japan