After obtaining his medical license from Saga University in Japan, Dr. Masamitsu Takamatsu joined Health and Global Policy Institute (HGPI) in 2016. As an associate, he was engaged in delivering policy recommendations on global health agendas and had led the launch of G-HEP (Global Health Education Program). After HGPI, he finished his junior residency at Nitobe Memorial Nakano General Hospital in Tokyo. From 2019, he joined WHO as an immunization consultant and have worked in Nigeria Country Office and Regional Office for the Western Pacific Region. Since July 2022, he works at WHO Papua New Guinea Country Office.