The current teacher license renewal system in Japan was introduced to enhance the quality assurance program that had been in place since the year 2000. The program was established to ensure that teachers’ professional knowledge and skills would be maintained, and further developed to keep pace with the changing times. This system was established with laws upgraded in 2007, and set forth in 2009. The purpose of implementing this system was not only to ensure teachers’ professionalism, but also to upgrade teachers’ professional skills. According to the regulations of this renewal system, all public and private school teachers and license holders in Japan are responsible for satisfying the renewal system requirements by enrolling in government approved college or university networks for at least 30 hours of lectures every ten years and passing tests related to each lecture. Teachers need to document the completion of the courses when applying to renew their teaching licenses at local boards of education. By analyzing the legislative process, content, structure, critiques, and supporting policies of the renewal system from related documents, this paper aims to introduce the Japanese system, and provides four recommendations to authorities in Taiwan in regards to the necessity for establishing teacher license renewal policies.