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About Us

Shinwa Rules Co., Ltd. is a leading measuring instrument manufacturer located in Tsubame and Sanjo, Niigata Prefecture, Japan, where metalworking production has been a tradition since the 16th century. Established in 1971, we have been producing and selling reliable metallic rulers and carpenter's squares that are widely recognized and trusted by professionals in various industries.

In addition to our flagship products, we also offer a range of useful measuring instruments such as calipers, thermometers, hygrometers, laser optical apparatuses, sheet heating elements, and more. As an OEM supplier, we also provide services such as marking special calibrations on machine tools, special surface fabrication with photographic techniques, and precise etching process on metallic parts.

With our commitment to developing attractive products, enhancing production quality, and promoting sales, we have become a top-selling metallic ruler manufacturer in Japan. We take pride in the fact that we are one of only a few manufacturers accredited by the Japan Calibration Service System and have contributed to the development of the Japanese economy by supplying our products to various industries through distributors.

To better serve our customers around the world, we have a production plant and sales office in Dalian, China, and a sales office in Illinois, USA.
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