1. An animation generation method for generating coordinated animation of a predetermined object of display with animation of a separate object of display, said method comprising the steps of: storing animation of a plurality of motions of said predetermined object of display, each respectively corresponding to a plurality of relationships with animation of said separate object of display; and synthesizing animation of a motion corresponding to the current relationship, using animation of said plurality of motions, based on said current relationship with animation of said separate object of display.