Tokai Spring industries, Inc.

Designed with exceptional straightness and optimized for minimal weight, our STEMs have demonstrated ideal deployment performance in space. With proven capabilities in extension lengths of up to 5,500 mm, we can manufacture to your exact specifications—any length, width, or custom requirement.

Partner with us for reliable, high-performance components that meet the rigorous standards of the aerospace industry—without adding unnecessary mass.

Moreover, at Tokai Spring, we design and manufacture high-precision springs for critical aerospace applications—from rockets and satellites to asteroid exploration systems. Our springs support vital functions such as deployment systems, release mechanisms, and payload instruments, where reliability and precision are essential.

Specializing in small-lot production (1 to 5 pieces), we work with complex designs and advanced materials that many others cannot handle. Even without detailed drawings, we provide full support from concept to completion.

Through close collaboration with aerospace agencies and research teams, we help turn ambitious space missions into reality—with Japanese craftsmanship and proven performance.