Sign planning for the “Tokyo International Forum”, a facility for cultural exchange in Tokyo. It took about four years from the basic design until the completion of the signs. The designer is Rafael Viñoly (USA). Characteristic is the use of black as a base, which had hardly been used in public facilities before, and that the graphics were uniquely devised in that they are floor plans turned into diagrams. The signs themselves are also of high grade quality. Their expressions presently serve as prototypes for many facilities in Japan.