Deming and Juran took quality to Japan after WWII. From Japan, you have Taguchi, Ishikawa, and Shingo at least.
Genichi Taguchi known for...
Taguchi Loss Function - offers a formula for determining a lack of quality
Kaoru Ishikawa known for...
Cause and Effect or Fishbone diagram. Turned PDCA (plan, do, check, act) into 6.
The five parts of a fishbone diagram: Man, Method, Machine, Mother Nature, Material.
Shigeo Shingo is known...
Rapid Setup and Poka-Yoke, SMED (Single minute exchange of die)