Core Business


Design and production of spiral springs

We are proud of the first-class quality and production output in Japan and our spiral springs are used for automotive seat recliners and adjusters of 30% or more Japan-made automobiles, winning the confidence of our customers and a good reputation.

In addition, we have patented several products and manufacturing processes and proved the more excellent technical abilities than any competitors. In recent years, our products have been adopted for daily use in housing facilities (pull-down shelves) and receiving an increasing number of orders year by year.

Main Applications

Inversion of automotive rear seats / Adjustment of automotive rear seat inverting speed / Adjustment of automotive window regulator operating force / Reduction of rear foldable seat lift-up and operating loads / Reduction of pull-down shelf operating loads / Inversion of seatbacks for luxury seats / Locking mechanisms, etc. for other mechanical systems


Main Equipment

Design Department
Spiral-spring machine
Compact spiral-spring machine
Spring forming center
Design Department
Torque meter
Durability tester
Imaging measuring machine
Hardness tester