The International Graphic Arts Show IGAS2015 was successfully held on Sept. 11-16, 2015, in Tokyo. The role and functions of print exhibitions for the printing industry are discussed from the viewpoint of the exhibition organizer of IGAS. It is found that that they play important roles, allowing printers and venders to study and match their business needs by offering a wide range of information relating the print and communication business. In addition, related facts and data such as the power distribution of the major print exhibitions in the world, history of print exhibition in Japan, and issues and future prospects of IGAS are described with comments.