Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The YKK Group is a Japanese group of manufacturing companies. As the world''s largest zipper manufacturer, YKK Group is most famous for making zippers. However it also manufactures other fastening products, architectural products, and industrial machinery. The initials YKK stand for Yoshida Kogyo Co., Ltd. corporation. YKK claims to be the first zipper company to promote environmental protection measures. YKK developed a line of environmentally friendly zippers", following the company''s philosophy "The Cycle of Goodness" which means that one prospers when the person renders benefit to others. "