Some of the most interesting developments of the last few decades in the field of fiber production have been the result of intensive study in Japanese industry and research institutes. This book was originally published in Japanese by the Society of Fiber Science and Technology, Japan, in order to present a thorough scientific and technological review of advances in fiber production, and is now published in English. In addition to providing an extensive review of recent breakthroughs in fiber spinning technology, this popular book illustrates how R&D can pay off in terms of commercial success in the textiles marketplace.