Utility of the rurality index for Japan for exploring good practice solutions for declining birthrates in rural areas

Background Japan is experiencing unprecedented decreasing birthrates. This preliminary study aimed to identify the municipalities in Aomori Prefecture that are successfully tacking declining birthrates using the Rurality Index for Japan (RIJ). Methods We obtained 100‐level RIJ and census data from 1980 to 2020 for children (age < 15 years) in the municipal population of Aomori Prefecture. Results The analysis revealed generally weak but significant relationships between population variables and the RIJ. Conclusions The RIJ is effective for identifying good practice communities that have developed and implemented solutions to prevent declining birthrates at the community level.