Secretariat
- Division of Orthopaedic Oncology, Chiba Cancer Center
- Secretary-General: Tsukasa Yonemoto
- 666-2 Nitona-cho Chuo-ku Chiba
260-8717, Ja
- TEL: +81-43-264-5431
Congress Secretariat
- C/O Congress Corporation
- 5-1 Kosai Kaikan Bldg., Kojimachibr Chiyoda, Tokyo,
102-8481, Japan
- TEL: +81-3-5216-5318
- FAX: +81-3-5216-5552
- E-mail: joa-tumor2020@congre.co.jp