The document discusses the contributions of Takashi Iba in the field of pattern languages over 20 years, focusing on various domains such as online education, active learning, project design, and collaboration. It details the development of numerous pattern languages and patterns aimed at enhancing practices across professions and everyday life, as well as initiatives by the Digital Agency of Japan to promote digital transformation. The document highlights significant conferences and publications reflecting the evolution and impact of pattern languages in societal and educational contexts.