Foremost, JIT refers to a method of inventory management that has proven to improve or boost the return of a manufacturing firm on investment, quality of work, and efficiency basically by reducing inventory. The functionality of JIT prevents you from seeing or viewing inventory as adding value, but instead as incurring the cost, which is against the regular or traditional way of practicing business.
This has some effects that are of benefit on the company, such as simplifying the flow of warehouse to shelves inventory, production scheduling, and more. On the other hand, Kaban is not a system that controls inventory like JIT.
The kanban is actually a scheduling system that provides a firm with information on what to produce, how much to produce, and when to produce. This is the key element that is implemented in JIT for effective inventory control. Kanban is a demand or pulls kind of scheduling system that can be in the form of bins, boxes, cards, or palettes.