We are specialized in manufacturing large-diameter bolts by using hot forging and heat treatment technology.  Our bolts for wind power generation facilities and construction machinery, as well as fastening components for railways, are widely used both in Japan and overseas.
In 2014 we were selected as one of the ‘300 Well Performing Small or Medium Sized Enterprises’

Track record of bolts for wind power generators delivered;
Domestically: Over 200
Globally: The United States and other countries.

Our company has high-level equipment for manufacturing inspections and manufacturing traceability that will be needed for next-generation industries such as renewable energy. We can also manufacture bolts that conform to international EN standards.