Dear colleagues and friends, The JKCOS(30th) was originally scheduled for April in 2020 at Nagasaki. It had been postponed to September in 2020 and canceled for the COVID-19 outbreak. Although the next 31st Combined Orthopaedic Symposium was scheduled to be held in Seoul in 2021, we had scheduled the 31st JKCOS at Nagasaki at the request of the Korean side. The 31st JKCOS was originally planned to be held June in 2021 and postponed to September in 2022. Now, we regret to announce that the 31st Japan-Korea Joint Orthopedic Surgery Symposium will be on the Web. This symposium is very special for us, because Emeritus Prof. Katsuro Iwasaki (4th president) and Emeritus Prof. Hiroyuki Shindo (18th president) have already hosted this meeting twice at Nagasaki. The first JKCOS/KJCOS annual meeting was held in 1990. For 30 years since then, the JKCOS/KJCOS played a significant role in providing venues for presentations and discussions on research achievements of orthopaedic surgery. All the members and attendees are "One team", not only for improving medical skills and research, but also for deepening mutual understanding and friendship. This symposium is not just an academic meeting, but a meeting that has developed with face-to-face communication of Japanese and Korean orthopedic surgeons. We think that it would be better to avoid holding the event on the Web, for it might be difficult for doctors who are not accustomed to using the Web to participate. For that reason, we have stuck to holding on-site events in Nagasaki so far. On the other hand, this symposium is a very valuable opportunity for young orthopedic surgeons in Japan and South Korea to make presentations at international symposiums. Three years have already passed since the last KJCOS held in 2019. There are still no prospect of the infection ends, and the restrictions on travel from South Korea to Japan have not been lifted. Now, we think that we should not stick to holding on-site events and should not postpone the symposium for another year or more. We believe this is the best decision under the COVID-19 pandemic at this point. The session on the Web will be from September 1 to 30, 2022. We will start accepting submissions of abstracts from May, 2022. We apologize for any inconvenience caused and appreciate your understanding and support.   Makoto Osaki President The 31st Japanese-Korean Combined Orthopaedic Symposium Department of Orthopaedic Surgery, Nagasaki University Graduate School of Biomedical Sciences

Secretariat   Department of Orthopaedic Surgery, Nagasaki University Graduate School of Biomedical Sciences 1-7-1 Sakamoto, Nagasaki City, Nagasaki 852-8501, Japan Phone: +81-95-819-7321     Symposium Secretariat（第31回日韓合同整形外科シンポジウム）   c/o Congress Corporation 1-9-17 Tenjin, Chuo-ku, Fukuoka 810-0001, Japan Phone: +81-92-716-7116 FAX: +81-92-716-7143 E-mail：jkcos-n@congre.co.jp   Copyright © The 31st Japanese-Korean Combined Orthopaedic Symposium All Rights Reserved