Nakanishi metal works Co., Ltd.

100 Years of Japanese Engineering Excellence.

Trusted by every high-speed train (Shinkansen) in Japan, Nakanishi Metal Works (NKC) brings a century of precision hardware innovation to the North American market. We specialize in high-performance, fully customizable window and door hardware designed to meet your unique vision without compromise. From heavy-duty rollers supporting 2,205 lbs to our revolutionary "Boost" technology that reduces operating force by 1/3, we redefine industry standards. Proudly supported by our manufacturing facility in Georgia, USA, we ensure local support and faster delivery.

Lever Style Window Handle

Our power-assist technology reduces operating force to 1/3, ensuring effortless access and comfort for everyone.

Unmatched Safety. 1,000kg Capacity. 100 Years of Engineering Excellence.
Nakanishi Metal Works (NKC) brings a century of Japanese precision to the North American market. Our hardware technology is world-class, proven for safety and reliability on every Shinkansen high-speed train in Japan. We specialize in high-performance, fully customizable window and door solutions—from heavy-duty rollers supporting up to 2,205 lbs to our "Boost Power" technology that reduces operating force to $1/3$. Proudly supported by our manufacturing facility in Georgia, we provide Japanese engineering excellence built in the USA.

NKC Key Product Solutions: Residential & Commercial Window Hardware
Explore NKC's innovative hardware lineup featuring three core technologies:BOOST POWER Handle: Revolutionary power-assist technology that reduces operating force to $1/3$ for effortless access.HEAVY DUTY Roller: Engineered for maximum durability, supporting loads up to 1,000 kg (2,205 lbs) with incredibly smooth movement.FINGER SMOOTH System: Perfectly synced operators and stays designed for a flawlessly integrated and seamless user experience.Customization: All products are fully customizable in shape, material, and design to fit your unique vision without compromise.

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