- After WWII, Japan's economy was in shambles and quality was poor, but experts like Deming and Juran helped introduce quality management principles through seminars and conferences with major companies. - Key figures like Ishikawa implemented techniques like fishbone diagrams, pareto analysis, and quality circles to deeply engage employees in quality improvement efforts. - By the 1950s-70s, Japanese companies had greatly improved quality and gained a strong reputation, though the specific management practices remained unknown outside Japan for some time.