A Multidomain Spectral Collocation Method for Computational Electromagnetics with Application to Optical Waveguides -- Thermonuclear Supernovae: Combining Astrophysical and Terrestrial Combustion -- Hypersonic Magneto-Aerodynamic Interaction -- Some Remarks on the CFD Research for Space Transportation System Development -- Development of Implicit Large Eddy Simulation -- DNA Computing Based on Actual Biological Sequences and Accurate Reaction Control -- From One-Month CFD to One-Day CFD — Efforts for Reducing Time and Cost of CFD — -- Numerical Attempts of Capturing Contact Surface -- Parallel Visualization Systems -- Numerical Simulation of Time-Dependent Buoyancy-Driven Convection in an Enclosure -- Automatic Topology Generation -- Computational Study of Influences of a Seam Line of a Baseball on Flows -- Vortex Breakdown Flows in Cylindrical Geometry -- Aerodynamic and Structural Analyses of Joined Wings of Hale Aircraft -- Numerical Simulation of Formation and Movement of Various Sand Dunes -- Evolutionary Multi-Objective Optimization and Visualization -- The Framework of a System for Recommending Computational Parameter Choices -- Gas flow in Close Binary Star Systems -- Flow Simulation using Combined Compact Difference Scheme with Spectral-like Resolution -- A New High Order Finite Volume Method for the Euler Equations on Unstructured Grids.This volume contains 20 papers presented at the Sixth International Nobeyama Workshop on the New Century of Computational Fluid Dynamics, Nobeyama, Japan, April 21-24, 2003. The Nobeyama Workshop focuses on predicting the next one hundred years of development of Fluid Dynamics, accounting for the current status and future trends of high performance computation and communication. The papers cover computational electromagnetics, astrophysical topics, CFD research and applications in general, large-eddy simulation, vortical flows, mesh generation topics, visualization, DNA computing, multidisciplinary simulation and optimisation, as well as algorithmic developments. The Workshops are known for the informal and concentrated atmosphere of in-depth discussion thanks to all the efforts of Prof. Kunio Kuwahara at ISAS, Japan. In celebration of his 60th birthday, this workshop was dedicated to him.