Visualization technologies are used for converting numerical simulation results into intuitive and easy-to-understand images and animations. Because of the increased sophistication of supercomputers, new developments are expected in the field of visualization. We are developing a parallel visualization program that can produce partial images separately on the K computer’s many compute nodes and integrate them into a complete image. Moreover, we are discussing with researchers in various fields about what types of visualizations are needed. By means of these efforts, we will provide the visualization services that K computer users really require. In addition, we expect that such advanced visualization technologies will also help reveal unknown phenomena, leading to new scientific discoveries.