Medical Data Vision Co., Ltd. (MDV) is a Japanese healthcare technology company founded in August 2003. It develops information and communication technology solutions intended to support better use of medical and health data and help create a society where people can choose healthcare services. A central part of its business is a large-scale medical claims and clinical database, which supports analysis for healthcare providers, pharmaceutical companies, and academic researchers. MDV reported 64.28 million actual patients in its database as of August 2026.

For hospitals and medical institutions, MDV offers tools for management improvement, real-time data use, performance benchmarking, clinical data analysis, nursing care needs analysis, and health-checkup operations. Its products include MDV Act, MDV Act Link, EVE, MDV KENSHIN CLOUD, MDV analyzer, and the KANGOTCHI+ application. For pharmaceutical companies and academia, it provides custom medical-data research, patient and prescription analysis, oncology analytics, and support for publications and safety studies. MDV also offers CADA2, a service that helps individuals manage hospitalization and high-cost medical expense payments.