This book is one of the most widely read publications on production management in Japan. The book is based on training materials prepared by Toyota specialists for seminars on the Toyota Production System, which took place in the mid-1970s. A lot of time has passed since then, but the book, which has been reprinted several times, including in English, still serves as a short guide to reducing production costs around the world. Kanban and just-in-time systems—two production and inventory management methods used within the Toyota Production System—help identify better ways to improve process productivity and product quality. The book is intended for managers seeking to reduce production losses and improve their company's production system. It is of interest to managers at all levels and will be of interest to students whose specialty lies in the field of production and services.