広製作所開設（1956年）以来、当部門の普通鋼・特殊鋼鋳鋼製品は造船・電力など重工業分野を始め、様々な分野で基本部品として使用されています。今や事業領域は国内に留まらず、海外へと広がっています。何より高い評価を得ているのは、独自の基盤技術から生み出された製品のクオリティです。一早い凝固解析システムの導入・活用など、高度な品質管理によりクオリティの維持を図っています。また社内品質保証体制の下、各国の船級認証を取得。あらゆる面においてユーザーの皆様に信頼していただける製品の提供を行います。

Since the establishment of Hiro Works in 1956, standard and specialized steel castings our Department have been utilized as basic components in a wide variety of industries, including heavy industries, such as shipbuilding and electrical power production. The markets for these products are not limited to domestic industries and expand to countries all across the globe. The high product quality that we have achieved through the use of our proprietary technology is well regarded by customers throughout the world. Kotobuki has maintained high quality by introducing and implementing leading edge quality control systems, such as computerized solidification analysis, in advance of our competitors. Furthermore, our stringent in-house quality assurance program has allowed us to obtain marine vessel certification for each customer country. We provide products that can be completely relied upon by our customers in every aspect.