Mazda is committed to developing and manufacturing vehicles with its whole heart. Mazda designers' aspiration appears everywhere throughout the "KODO Design - Breathing Life into the Car". We believe that even reproducing such aspiration is important for establishing Mazda brand. Mazda's Tool & Die Production Department is aggressively proceeding with "Mass Craftsmanship" which is essential in realizing the "KODO Design". By measuring the motions of craftsmen, which had been cultivated over the years, with a motion capture system and analyzing them along with their eye movements and musculoskeletal motions, we worked on visualization of the know-how of craftsmen. Furthermore, we implemented quantitative comparisons with skill medical record and proceed to develop craftsmen early. This article introduces new efforts to pass down the skills and techniques to sustain the "KODO Design" by Tool & Die Production Department.