Abstract
Strangeness in newness becomes commonplace. This process is mode or diffusion. A part of commonplace becomes strange. This Process is decline. These processes (mode, diffusion, or decline) are induced by the structural change in the meaning network (MN). So, unbalance of MN-change causes disarray of trend on mode, diffusion, or decline. For example, rapid increase of focal points in MN causes market decline or plateau. We discuss about MN in theory and consider usefulness of MN concept taking videogame industry as examples.
