The objectives of UMIN are as following. To promote standardization of medical data and hospital statistics. The main computer system of UMIN is located at the University of Tokyo Hospital. Staffs at each hospital can use their own terminals to make an access to the UMIN free of charge. By the end of 1994, forty-two national university hospitals joined the system, and more than 5000 are registered as members.
Membership is now available to healthcare professionals who are members of academic organizations.