A study of the body of Japanese architecture in the early 60's. On the occasion of Hayao Miyazaki, one of the most important directors and animators in Japan, and the theme of his films, specifically Howl's Moving Castle, a theoretical approach is taken and an analysis of the imaginary living/moving building and how it was projected through the Metabolism movement, as well as the controversy that develops between technological progress and nature. The Metabolism movement is rapidly spreading and is a source of inspiration for the creation of a mobile society with the basic characteristics of variability and adaptability in order to meet human needs. By studying the psychological implications as well as the decisive influences of Miyazaki but also through its characteristic design and the hidden meanings that emerge through the films, an ecological city model is identified, based on a peaceful ethics, in which there is a balance between nature and human technological progress. Architectural design has always viewed nature as a source of inspiration and knowledge for drawing ideas. In the present thesis project, the investigation of the evolution of nature in the urban landscape and the influence of the Metabolism movement in the West is attempted. Although the ideas of the Metabolists prove to be utopian and none of them are applied in practice, the connection of Metabolism with the western world is obvious and changes from idea to idea. At the same time, an attempt is made to identify the common elements and the differences between the new currents that emerge and the characteristics of each case are examined.