Shading Computer (濃淡コンピュータ Nōtan Konpyūta?) is the tentative name given by fluid mechanics expert Matsusada to a computer that uses the fluidic movements of a medium, such as water, to perform any kind of calculation, like a real computer. It was originally a theoretical model of a next-generation computer as envisioned by Matsusada in his book, The Future of Next-Generation Processors using Viscosity and Density.