![]() Taking particular note of this application, he thought of the possibility of incorporating urethane into color steel sheet to fabricate insulating external wall materials. ![]() To this end, he had explored a battery of inventive ideas, one of which was to create heat-insulating siding materials using urethane, a chemical compound found in materials used to make various consumer products including thermal mattress fillings. From early on, he had been very concerned about the harsh Tohoku winters, which contributed to a high incidence of brain disorders in the region, and wished to create warm and comfortable living environments even during the coldest months. Takashi Ishikawa, the founder of IG Kogyo, originally founded Ishikawa Giken Kogyo in 1968 by reorganizing Ishikawa Kawara Kogyo. In this article, I will share some of the key takeaways from my recent trip. While gathering information, I had a number of memorable encounters and made several fascinating discoveries, including learning about the deep commitment of the company's founder, who invented Japan's first foam composite metal siding materials, and his "spirit of manufacturing" that continues to this day. Intrigued by this profile, I visited the company's head office (Higashine City) and Sagae Factory (Sagae City), both in Yamagata Prefecture, in order to meet the company owner and walk the production site. Boasting myriad patents for related inventions and technical prowess as a supplier of many industry-first products, the company is well known as a pioneer and leader in the manufacture and sale of metal siding (for detached housing). IG Kogyo, a Sumitomo Corporation Group company, develops, manufactures, and sells heat-insulating exterior wall and roofing materials with a commitment to supporting comfortable living environments.
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