A commemorative lecture meeting on the inclusion of a new chapter of traditional medicine in ICD­-11 was held in Tokyo in February 2020. The head of the Collaborating Centre for WHO­-FIC in Japan explained the process of the project, which started in 2006 to increase WHO's data collection from developing countries and expressed gratitude to the concerned persons who made efforts to obtain consensus with China and Korea. WHO promoted integrated coding between traditional medicine and Western medicine. In the field of acu­puncture, meridian and collateral patterns proposed by Japan were adopted and research activities have begun. In the field of Kampo medicine, the prescription content is often used in a fixed form as a representative for­mula pattern in Japan, so clinically high­-level research will be possible under this new classification. In the field of medical information, it has been pointed out that there are high hurdles for medical information man­agers to understand traditional medicine. It is expected that the progress of mutual understanding of both medi­cines. From now on, activities in research, translation, education and dissemination of this new classification should be promoted.