The plant, which was built on an area of 3.11ha, will produce 480,000 engine castings a year.
The  companys chairman Tatsumi Niwa said the company planned to increase  capacity to 4.5 million products for domestic and export markets by  2019.
Earlier, Tokyo Keiki Inc. announced it had started  construction of its $40-million plant, producing electro-magnetic and  hydraulic equipment, at the 1,010-ha park.