Tokyo Koki Co. Ltd. engages in the manufacturing and selling of various testing machines and measuring instruments in Japan. The company offers static tension, compression, bending, and fatigue tests for various materials; and structural testing machines, performance testing machines, and contract testing services. It also manufactures and sells locking nuts and springs, special springs, bolts, and other fastening materials; provides technological engineering products for safe lifestyle, as well as maintenance services for metal material testing machines, measuring instruments, hydraulic equipment, etc.; and sale of construction materials. Tokyo Koki Co. Ltd. was founded in 1923 and is headquartered in Sagamihara, Japan.