The YKK Group (YKKグループ Waikeikei Gurūpu?) is a Japanese group of manufacturing companies. As the world's largest zipper/zip 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 Kōgyō Kabushiki Kaisha (吉田工業株式会社?), Yoshida Manufacturing Corporation.
More than 90% of all zippers in the world are made in over 206 YKK facilities in 68 countries around the world, with the largest factory in Georgia, USA which produces more than 7 million zippers per day.