Sori Yanagi is one of the most famous Japanese industrial product designer. Sori Yanagi Center is the archive of his design, at the same time, it is a piece of design product as itself. Sori Yanagi Center for design is a 1,600 square meter building in Shibuya, Tokyo. The museum has been designed for permanent and temporary design exhibition. The museum design consists of geometric variations of a two-dimensional curve. The three-dimensional form of exterior and interior space is originated from a single curve. The curve is the signature of the museum, which is used as functional and graphical element. As a graphic element, Sori Yanagi Center has strong contrast with existing urban fabric. It defines the museum as a design piece as itself. The museum is interrelated with the identity of Sori Yanagi’s design language, as well as, the form must closely relate with the function.