ABOUT US

Corporate Philosophy

Advancing society through the exploration of better materials.

Chemical products, building materials, ceramics. Our business has always been rooted in the exploration of materials. Drawing on the technology we have accumulated over more than 100 years since our founding in 1917, and through our flexible, unconventional thinking, we will continue to contribute to society in ever broader and deeper ways.

History

We were founded in 1917 (Taisho 6) on Konoshima Island in Kasaoka City, Okayama Prefecture, as the Konoshima Sulfuric Acid Manufacturing Plant. We later changed our name to Konoshiima Artificial Fertilizer Co., Ltd. and began operating as a chemical fertilizer company.
As the era shifted to the Showa period, we merged with the former Konoshima Chemical Co., Ltd. in 1946 (Showa 21), establishing the current Konoshima Chemical Co., Ltd., which continues to operate today.Although the company initially manufactured “fertilizers,” it leveraged that technology to begin producing “magnesium chloride and magnesium sulfate”—the roots of its chemical products business, which continues to this day. Later, as housing demand grew alongside the period of rapid economic growth, the company also began manufacturing “calcium silicate boards, a non-combustible building material.” Furthermore, in recent years, to further strengthen our chemical business, we have begun manufacturing ceramics. In this way, we develop, manufacture, and sell products that are closely attuned to the demands of the times.

Company symbol

Three spheres evoking a molecular structure.The droplet-like shape represents the origins of Konoshima Chemical, which extracted materials from seawater, and symbolizes the company’s history of evolving into its current three business divisions by leveraging its strength in creative thinking.
The blue used in the logo symbolizes Konoshima Chemical’s technology, while the green represents the global environment.
The gradient from blue to green illustrates how our technology protects and nurtures the global environment.“SiMA” is a term used in earth science to refer to one of the Earth’s crustal layers; it is a coined word derived from the initials of its constituent elements, silicon (Si) and magnesium (Mg).Of these elements, which are closely associated with our business, we have deliberately written the “i” in “silicon” in lowercase and accented it with a contrasting color to express our deep connection to materials development.