The aim of this paper is to have implications for developing a cooperation model to improve teacher education in developing countries by focusing on lesson study. We reviewed significance and issues in prior projects which attempted to introduce lesson study mainly as a framework of in-service teacher training program, and discussed a case of lesson study in Faculty of Educational Sciences (Facultad de Ciencias de la Educación:FCE in Spanish), Autonomous University of Santo Domingo (Universidad Autónoma de Santo Domingo:UASD).
Lesson study has been treated as a good practice of bottom-up measures for lesson improvement and professional development of in-service teacher training. However, the establishment of pre-service teacher training program in university with the core concept of lesson study would be essential as an initial condition or external condition for sustainable development of teacher education in developing countries from the long-term perspective. The paper showed that lesson study as a means of faculty development (FD) functioned effectively by promoting research on their own lessons in UASD-FCE. And also, it revealed that the project could not realize the dialogue and interaction in the discipline of educational studies, and curriculum research and development. We proposed that we should execute research on each practice in international cooperation consistently, and re-examined what to be transmitted and disseminated in the context of developing countries on the basis of educational and research experience in Hiroshima University.