The Administrative Reports on Hospital Bed Function (ARHBF) was started in 2014 to provide data for facilitating the Regional Medical Care Vision (RMCV) targeted to the year 2025. The RMCV aims at converting excessive acute care wards into less-costly chronic or rehabilitative wards. All general hospitals (excluding psychiatric hospitals) and clinics with inpatient beds are required by the Medical Care Act to report detailed data as of July each year and hospital-specific data are published on prefectural governments' website as a form of Excel files. The author compiled the five-year cumulative data into data warehouse and analyzed the progress of converting ward-specific clinical functions through ward-matching technique. Approximately 30% of acute care wards in 2014 have already converted as of July 2018, and the negative linear correlation between the actual converting rate and the realization rate of the self-proclaimed target suggested the unwillingness of most hospitals for conversion of their ward functions. ARHBF data can be used effectively by data-warehousing to facilitate RMCV.