Sumitomo Osaka Cement Co., Ltd.

Sumitomo Osaka Cement is a major cement producer, ranking around third in the industry by sales volume. Its defining feature is a cement foundation combined with growth in non-cement fields such as high-performance products, optoelectronics, and new materials. Its core operations include cement for construction and civil engineering, limestone, and concrete repair materials, while it expands into higher-value businesses through optoelectronics—especially optical modulators for communications and photonics—new materials, and high-performance products. It is a materials manufacturer built on the two pillars of cement and advanced materials, with its main base in Shiodome, Tokyo.