GRAMMAR OF DESIGN is workshop we created. It was born from the master thesis of Tachikawa, which studied the similarity of language and design. Extracting the general ideas that are common to the concept of historical masterpiece designs, we organized the rules of design, like a “grammar” of language. It is introduced as innovation programs to companies such as SCSK or as a lecture in Musashino Art University and University of Tokyo i.school. Many great ideas have been produced from this practical workshop.