While Kanban today is a complicated system of elaborate protocols and operational standards, back in the days in Japan, it had humble origins of sticking cards containing information on various part trays, trolleys, and inventory assets. The cards represent the demand or the lack of it based on which processes and inventory will be managed downstream. Kanban boards are the philosophy of Kanban boiled down to management structures and dashboards. It is simply a board that is used to establish proper Kanban practices at work.
Following any kind of agile tactic requires the entire team to come together and work as one unit. Whether you utilize Kanban or scrum boards or Kanban backlogs, or a combination of the two such as Kanplan, without a top-down integration with the program, building an agile team is impossible.