Our roots began in 1921 when the founder, Katsujiro Kobayashi started research on flat polishing technologies at a Japanese naval arsenal. Later, Kobayashi established a company that manufactures special optical measurement units, “Rex Optical Research Center”. In the year of 1963, known as the year of the birth of the Japanese semiconductor industry, the company was renamed to “Rex Optical Measurement Unit Manufacturing Company” and started polishing and processing services in the semiconductor industry.