TOYOTA, Aichi -- At a center for teaching Toyota production methods, workers from around the world learn bolt-tightening by moving dance-like to a metronome and practice paint jobs by studying videos of their performance. "It comes from experience. The body knows how to learn," says Kazuo Hyodo, a 30-year veteran on the assembly line as he demonstrates how to stand, finger the bolts and listen to the buzz of the drill for proper bolt-tightening Toyota style. "Hear that? That sounds metallic, and you're screwing it in too tight." At a time when Toyota Motor Corp. appears on track to overtake...