Kobayashi 20 Keys 2025. Kobayashi's book 20 keys to workplace improvement gives amazing deep understanding of the various elements or keys to operational excellence or lean. 20 keys to workplace improvement introduces a method to make significant improvement across your whole manufacturing business.

The 20 keys international partner network, with its head office at pdi, in tokyo japan, is a globally represented operations improvement consulting company. The 20 keys system was developed in japan by iwao kobayashi when he, after completing industrial studies at university, joined mitsubishi heavy industries.