Regional disparity in the provision of rehabilitation services using the open data from the Japanese national claims database: an ecological study.

The large surplus in rehabilitation supply in the western part was attributed to the greater number of providers, while the smaller surplus in Kanto and Tokai regions was due to the smaller amount of supply. The number of rehabilitation services used was lesser in the eastern part such as Tohoku and Hokuriku regions, indicating regional differences in the provision of rehabilitation services.