The Industrial Internet of Things (IIoT) is a paradigm shift, primarily in the domain of manufacturing industry. The concept is highly attractive for a majority of the industrial sectors due to better operational efficiency capabilities in the production process, smart objects identification mechanisms by embeddedness technologies, intelligent automation abilities and around the clock monitoring abilities. Importantly, it reduces workforce intervention in risky industrial environments. Some of the best practicing places and activities for the IIoT employment are factory shop floors, materials handling, assembly lines, production processes, finalising goods, and other inbound and outbound logistical tasks. The basis for the IIoT phenomenon growth is the Internet of Things (IoT) technologies, which have currently been ensuring efficient work execution in many spheres, industrial as well as commercial and social. This chapter provides a discussion on IIoT concepts and definitions, on business drivers behind the growth of this technology, and the evolution process of this phenomenon. This contribution also discusses the fundamental underlying principles, related technologies, deployment approaches in different areas and associated frameworks. The chapter also explore Japanese Industry-specific case studies, where the industries have already been employing the IIoT-related practices. These include Zenitaka Corporation, Tsuchiya-Gousei, Toyota and Hitachi. This book chapter provides a broader overview in crystal clear and sets the background for the rest of the chapters in this book.