Secretariat
Department of Orthopaedic Surgery, Okayama University
2-5-1 Shikata-cho,
Kita-ku, Okayama
700-8558, JAPAN
Congress Secretariat
2346-1 Senoo,
Minami-ku, Okayama
701-0205, JAPAN
TEL:+81-86-250-7681　
FAX:+81-86-250-7682
MAIL：jpoa2021@wjcs.jp