Initially created as workwear in the United States, denim became an integral part of fashion during the 1950s and established as standard daily wear. In recent years, vintage denim has become an extremely valuable commodity throughout the world, creating a whole new genre of denim. Combining vintage features with modern styles, Japanese brands have led the industry in the manufacturing of high quality denim. A new magazine illustrating the characteristics of Japanese denim, such as the type of threads, dyes, weaving, stitching, and designs, has been released. The magazine also features interviews with various top directors and designers regarding their thoughts on the evolution of Japanese denim.