Harmonic Drive Systems, Inc. is a Japanese machinery company specializing in high-precision reduction gears and other mechatronics products under the Harmonic Drive brand. With an ESG score of 33.7, the company is deemed high risk. Founded in 1970, this Tokyo-based company's products are used in industrial robots and semiconductor production equipment. Harmonic Drive Systems also offers planetary-gear speed reducers under the AccuDrive and Harmonic Planetary brands.