Our company has been manufacturing stainless steel piping products since 1964 (Showa 39), and we are proud of being a specialized manufacturer with a long tradition and excellent results.

Today, we manufacture products with the best technology and newest facilities in this industry, under complete quality control from casting to processing and finishing of stainless steel indoor piping for construction, stainless steel piping for industry, fittings for stainless steel underground water piping, and valves.

Above all, “O.N. Fitting” was the first indoor piping system in the world to acquire ISO9001 (April 1999), and we are always striving to improve customer satisfaction by satisfying the needs of our customers and pursuing high quality and stable supply.

In the 21st century, environmental hormones and product recycling have been highlighted as social issues. We wish to contribute to improvement of respect for human life and the environment by promoting conservation of resources, and by reduction/control of waste materials and environmentally damaging substances through acquisition of ISO14001 (June, 2006), and through our business activities such as manufacturing stainless steel products.