1. Labour and welfare;Ministry of Health;Survey on Dental Disease,2018
2. The national information and technology partner to the health and social care system, UK,2011
3. Criminal investigation bureau;First Investigation Division;National Police Agency. Police handling corpses by prefecture,2019
4. Study Group on the Ideal Cause of Death Investigation System for the Prevention of Criminal Death Oversight. “Ideal Cause of Death Investigation System for the Prevention of Criminal Death Oversight”,2011
5. Policy Planning Department, Kyoto Prefecture. Estimated Population of Kyoto Prefecture;Planning,2021