Kanban is a Japanese word that translates as visual board. Kanban is the workflow management system used at the heart of the Toyota Production System and is the mechanism that enables their Just in Time production.
About LeanLean product development seeks to maximise business value whilst minimising waste, it is an evolution of the management discipline that originates from the Toyota Production System and their Just In Time manufacturing process.
Kaizen - a Japanese word meaning Continuous Improvement. Kaizen is at the core of the Toyota Production System where the entire workforce is encouraged to continually try to improve the process.
Kanban - a system of workflow management that is at the heart of the Japanese Just In Time methodology. Essentially, it's a system for signposting actions that need to be taken, originally through leaving a card in place at a point where it would become necessary to produce more items - eg at the bottom of a container.