http://en.wikipedia.org/wiki/The_Toyota_Way
I bought and read that book some years ago. Found it pretty interesting. There is a lot of detail and statistics in it, but the overall theme is of Kaizen (roughly, continuous improvement), along with muda, mura, muri (all three terms explained in the links below):
http://en.wikipedia.org/wiki/Kaizen
http://en.wikipedia.org/wiki/Muda_(Japanese_term)
"In 2004, Dr. Jeffrey Liker, a University of Michigan professor of industrial engineering, published The Toyota Way. In his book Liker calls the Toyota Way "a system designed to provide the tools for people to continually improve their work."
Also, see Muji :)
http://jugad2.blogspot.in/2010/05/muji-simplicity-is-decepti...