1. Division of Cancer Statistics Integration Center for Cancer Control and Information Services National Cancer Center Chuo‐ku Tokyo Japan
2. Department of Gastroenterology and Endoscopy National Cancer Center Hospital East Kashiwa Chiba Japan
3. Division of Biostatistics and Bioinformatics Graduate School of Public Health St. Luke’s International University Tokyo Japan
4. National Cancer Registry Section Center for Cancer Control and Information Services National Cancer Center Chuo‐ku Tokyo Japan
5. Department of Global Health Policy Graduate School of Medicine The University of Tokyo Bunkyo‐ku Tokyo Japan