Mitsui High-tec, Inc. is a Japanese manufacturer of precision dies, motor cores for traction motors, and lead frames, based in Kitakyushu, Fukuoka Prefecture. Founded in 1949 as a manufacturer of stamping dies, the company expanded rapidly following its development of a stamping process for IC lead frame production. It is currently a major global supplier of the laminated motor cores used in hybrid and electric vehicles, with local subsidiaries in the Chinese, North American, and European markets. The company is not affiliated with the Mitsui Group; it is named for its founder, Yoshiaki Mitsui. Wikipedia