Nissei Corporation was started in March 1941 as a spin-off of the Brother Corporation. Nissei's original role was manufacturer of precision machined components for Brother sewing machines. Nissei Corporation has evolved to become one of largest gear manufacturers in the world manufacturing fine-pitch gears by the mid-1950s and die castings by the mid-1960s. These technologies and know-how were then combined in the production of gearmotors. The Gear Products Division, producing two million gears per month, and the Transmission Equipment Division, producing gearmotors and gear reducers, comprise Nissei Corporation today.