This present research Conducts a comprehensive study of minimalism as an ideology and architectural style and analyzes its relationship with professional ethics in contemporary architecture. This study first examines the historical roots and theoretical foundations of minimalism and explains its connection with modernity and other architectural styles such as Modernism, International Style, Brutalism, and Japanese architecture. With a focus on the philosophy of “less is more,” this research demonstrates that minimalism goes beyond a design style; it is an ethical framework that emphasizes simplicity, the elimination of unnecessary elements, sustainability, and respect for the environment. A case study of works by Tadao ANDO, a prominent Japanese architect, particularly the Church of the Light, the Design Museum Site, and the Modern Art Museum of Fort Worth, provides a practical model of the integration of minimalism with professional ethics. The ethical framework in minimalist architecture includes respect for nature, honesty in the use of materials, attention to local culture, commitment to quality execution, sustainability, creating a spiritual experience, and responsible innovation. This approach makes architects more sensitive to environmental and social responsibilities and enables them to create spaces that are beautiful, functional, and responsive to the diverse needs of contemporary communities. Additionally, the research addresses the limitations and challenges of implementing minimalist architecture and emphasizes the role of new technologies in its development, while also forecasting the future of this style. This study provides a foundation for further investigations into how the principles of minimalism manifest in traditional and contemporary architecture.