About Us

SMI CA is part of an international group (STM Group - Saeilo Tohoseiko Manufacturing Group) focused on a development of world class manufacturing technologies. STM Group includes TOHOSEIKO, a world renowned precision spring manufacturer located in Japan.

About Tohoseiko

TOHO SEIKO Co., Ltd. was founded in Toyooka City, Hyogo Prefecture, Japan in 1957 and as a specialized manufacturer of springs, received high praise from the industries such as optical equipment, telecommunications equipment, industrial equipment, automotive, consumer electronics, electronic components, etc. because of its technology and quality.

Presently TOHOSEIKO continues new challenges in response to the needs of our customers by developing the factory automation and entering the new market such as medical devices.

In the world market, in 1991 TOHOSEIKO established the production base in Shenzhen, China, and in 2003, in Shanghai, China to supply its products to the world class manufacturers in Southeast Asia. In 1998 TOHOSEIKO entered US market and has been supplying precision springs to the world class manufactures. In 2018 TOHOSEIKO has opened CA branch to create the hub of customer service, engineering, and production for the US customers.

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