

President
Toru Inoue

International
Secretary General
Hiroaki Wakai

Board Member
Joseph D Lim

Board Member
Dominic Leung

Board Member
Ye Lin
| President | International Symposium Chairman | Host Country | |
|---|---|---|---|
| 1983 | Shumon Otobe | Clinical Implant Society | Japan |
| 1984 | Kouichiro Ishikawa | Tokyo, Japan(1st) | |
| 1985 | Yong Whan Chin | Seoul, Korea(2nd) | |
| 1986 | Toshitaka Kaketa | Hiroshi Rai | Tokyo, Japan(3rd) |
| 1987 | Dominic Leung | Singapore(4th) | |
| 1988 | Eichi Kojima | Utena Tsunosue | Tokyo,Japan(5th) |
| 1989 | Shumon Otobe | Tokyo,Japan(6th) | |
| 1990 | Dominic Leung | K L Ngan & Denis Tan | Singapore(7th) |
| 1991 | Pongsiri Sumitra | Chiang Mai, Thailand(8th) | |
| 1992 | Choul Jin Row | Yong Whan Chin | Seoul, Korea(9th) |
| 1993 | Foo Chi Chean | KualaLumpur, Malaysia(10th) | |
| 1994 | Foo Chi Chean | R Hartono | Bali,Indonesia(11th) |
| 2nd WCOI Co-sponsor | Yokohama, Japan | ||
| 1995 | Joseph D Lim | Manila, Philippines(12th) | |
| 1996 | Joseph D Lim | Dominic Leung | Singapore(13th); Joint ICOI |
| 1997 | 2nd IDIC Co-sponsor | Bangkok, Thailand | |
| 1998 | Toshiyuki Satou | Shukichi Aiura | Tokyo, Japan(14th) |
| 1999 | Caesar Wong | Hong Kong, China(15th) | |
| 2000 | Caesar Wong | Masaki Fukai | Tokyo, Japan(16th) |
| 2001 | Caesar Wong | Hong Kong, China(17th) | |
| 2002 | Hendra Hidayat | Caesar Wong | Panyu, China(18th) |
| 2003 | Hendra Hidayat | Jakarta, Indonesia(19th) | |
| 2004 | Shukichi Aiura | Kee Leong Ngan | Singapore(20th), Joint ICOI/AP |
| WCOI 6 Co-sponsor | Honolulu, Hawaii, USA | ||
| 2005 | Shukichi Aiura | Tokyo, Japan(21th) | |
| 2006 | Ye Lin | Ye Lin | Beijing, China(22th) |
| 2007 | Hainan, China(23th) | ||
| 2009 | Toru Inoue | Toru Inoue | Tokyo, Japan(24th) |
| 2011 | Masaki Fukai | Tokyo, Japan(25th) | |
| 2014 | Masaki Fukai | Hiroaki Wakai | Tokyo, Japan(26th) |
| 2016 | Toru Inoue | Hiroaki Wakai | Busan, Korea(27th) |
| 2018 | Toru Inoue | Hiroaki Wakai | Tokyo, Japan(28th) |
| TBA | Tokyo, Japan (29th) |