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Real World Data in Japan: Chapter I NDB

introduction Real world data (RWD) is defined as data that are generated and collected during routine health care and can be utilized for clinical studies, epidemiological studies, health services research, and health economics and policy research. RWD includes (i) administrative claims data, (ii) electronic medical record data, (iii) primary care surveillance data, and (iv) disease registries. This series of reports titled “Real World Data in Japan” overview the current status of various Japanese RWD; utilization of RWD for academic studies; and the future perspective of creating real world evidence (RWE) using RWD. Chapter 1 briefly describes universal healthcare coverage in Japan, overviews administrative claims databases in Japan, and particularly focuses on the National Database of Health Insurance Claims and Specific Health Checkups of Japan (NDB).