■Manufacturing and sales of metal siding (Starline Prime, etc.) ■Manufacturing and sales of galvanized steel sheets, aluminum-zinc alloy coated steel sheets (Galvalume steel sheets, SGL) ■Manufacturing and sales of wear-resistant steel sheets, fluororesin coated steel sheets, various painted steel sheets, and surface-treated steel sheets ■Manufacturing, processing, and sales of metal sandwich panel building materials (Isoband, Isodach, etc.) ■Manufacturing, processing, and sales of metal roofing and wall material formed products (EvarooF series, etc.) ■Design, supervision, and contracting of construction for buildings