The Department of Mathematics Education of the University of Indonesia has done a lot of cooperation, and one of them is Gunma University, japan. This time, the Ministry of Mathematics Education conducted cooperation in the field of education, with the form of the event “Lecture and discussion of the Indonesian National education system by Prof. Yaya S Kusumah & Prof. Takashi Itoh.” the event was attended by lecturers and took place on January 14, 2020.