Kaizen is a Japanese philosophy that focuses on continuous improvement involving all employees. It has five key elements: teamwork, increased efficiency, improved employee morale and satisfaction, improved safety, and the five S framework of seiri, seiton, seiso, seiketsu, and shitsuke. Kaizen is implemented through training, project selection, team selection, process mapping, and continuous improvement. It is applicable for all levels of an organization from top management to workers. Toyota is an example of a company that successfully uses kaizen to achieve high production efficiency.