- The Japanese Society for Spine Surgery and Related Research
- http://www.jssr.gr.jp/english/index.html
- Department of Orthopedic Surgery, Akita University Graduate School of Medicine (Japanese only)
- http://www.med.akita-u.ac.jp/~seikei/
- Royton Sapporo
- http://www.daiwaresort.jp/en/royton/
- Sapporo Geibun-kan (Japanese only)
- http://www.sapporo-geibun.jp/
