城山産業 Company Profile

We are a specialized manufacturer positioned among the top in the industry for the production of cores (electromagnetic iron cores).

Choshi Sangyo Co., Ltd. conducts all processes related to products, from design to testing, development, manufacturing, and delivery, in a consistent in-house system using world-standard equipment and technology, along with continuously evolving creativity. We achieve comprehensive product technology development, thorough quality control, and delivery management. With our high technical capabilities and a consistent system provided by specialized manufacturers, we continue to pursue high-level products swiftly and flexibly in response to the increasingly sophisticated and diverse needs of the market.