Japan: Summer Sports / Winter Sports
Games: 41 games in 22 countries
Events: 436 distinct events in 50 sports
Participants: 3,764 (2,654 men and 1,110 women)
Youngest Participant: Etsuko Inada (12 years, 4 days), 1936 Winter Games
Oldest Participant: Hiroshi Hoketsu (71 years, 128 days), 2012 Summer Games
Most Medals (Athlete): Takashi Ono (13 medals)
| Rk | Games | Flag Bearer | Participants | Men | Women | Sports | Gold | Silver | Bronze | Total | Top Medalist(s) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2012 Summer | Saori Yoshida | 291 | 136 | 155 | 29 | 7 | 14 | 17 | 38 | 3 athletes with 3 medals |
| 2 | 2010 Winter | Tomomi Okazaki | 91 | 48 | 43 | 14 | 3 | 2 | 5 | 7 athletes with 1 medal | |
| 3 | 2008 Summer | Ai Fukuhara | 332 | 167 | 165 | 31 | 9 | 6 | 10 | 25 | Kosuke Kitajima (3 medals) |
| 4 | 2006 Winter | Joji Kato | 110 | 58 | 52 | 14 | 1 | 1 | Shizuka Arakawa (1 medal) | ||
| 5 | 2004 Summer | Kyoko Hamaguchi | 306 | 139 | 167 | 31 | 16 | 9 | 12 | 37 | Kosuke Kitajima (3 medals) |
| 6 | 2002 Winter | Eriko Sanmiya | 103 | 59 | 44 | 14 | 1 | 1 | 2 | Tae Satoya and Hiroyasu Shimizu (1 medal) | |
| 7 | 2000 Summer | Kosei Inoue | 266 | 156 | 110 | 28 | 5 | 8 | 5 | 18 | 3 athletes with 2 medals |
| 8 | 1998 Winter | Hiroyasu Shimizu | 156 | 92 | 64 | 14 | 5 | 1 | 4 | 10 | Kazuyoshi Funaki (3 medals) |
| 9 | 1996 Summer | Ryoko Tamura-Tani | 307 | 157 | 150 | 27 | 3 | 6 | 5 | 14 | 42 athletes with 1 medal |
| 10 | 1994 Winter | Reiichi Mikata | 59 | 43 | 16 | 11 | 1 | 2 | 2 | 5 | Takanori Kono (2 medals) |
| 11 | 1992 Summer | Kumi Nakada | 256 | 175 | 81 | 24 | 3 | 8 | 11 | 22 | 3 athletes with 2 medals |
| 12 | 1992 Winter | Tsutomu Kawasaki | 60 | 40 | 20 | 11 | 1 | 2 | 4 | 7 | 12 athletes with 1 medal |
| 13 | 1988 Summer | Mikako Kotani | 255 | 186 | 69 | 23 | 4 | 3 | 7 | 14 | Yukio Iketani and Mikako Kotani (2 medals) |
| 14 | 1988 Winter | Seiko Hashimoto | 48 | 37 | 11 | 9 | 1 | 1 | Akira Kuroiwa (1 medal) | ||
| 15 | 1984 Summer | Shigenobu Murofushi | 226 | 174 | 52 | 22 | 10 | 8 | 14 | 32 | Koji Gushiken (5 medals) |
| 16 | 1984 Winter | Tadayuki Takahashi | 39 | 32 | 7 | 9 | 1 | 1 | Yoshihiro Kitazawa (1 medal) | ||
| 17 | 1980 Winter | Osamu Wakabayashi | 50 | 46 | 4 | 10 | 1 | 1 | Hirokazu Yagi (1 medal) | ||
| 18 | 1976 Summer | Katsutoshi Mekota | 213 | 153 | 60 | 20 | 9 | 6 | 10 | 25 | Mitsuo Tsukahara (5 medals) |
| 19 | 1976 Winter | Masaki Suzuki | 58 | 50 | 8 | 10 | |||||
| 20 | 1972 Summer | Masatoshi Shinomaki | 184 | 148 | 36 | 21 | 13 | 8 | 8 | 29 | Sawao Kato (5 medals) |
| 21 | 1972 Winter | Mineyuki Mashiko | 85 | 65 | 20 | 10 | 1 | 1 | 1 | 3 | 3 athletes with 1 medal |
| 22 | 1968 Summer | Yukio Endo | 171 | 146 | 25 | 18 | 11 | 7 | 7 | 25 | Akinori Nakayama (6 medals) |
| 23 | 1968 Winter | Takaaki Kaneiri | 61 | 52 | 9 | 8 | |||||
| 24 | 1964 Summer | Makoto Fukui | 328 | 270 | 58 | 21 | 16 | 5 | 8 | 29 | Yukio Endo and Shuji Tsurumi (4 medals) |
| 25 | 1964 Winter | Sadao Kikuchi | 47 | 41 | 6 | 8 | |||||
| 26 | 1960 Summer | Takashi Ono | 162 | 142 | 20 | 17 | 4 | 7 | 7 | 18 | Takashi Ono (6 medals) |
| 27 | 1960 Winter | Junko Ueno | 41 | 36 | 5 | 7 | |||||
| 28 | 1956 Summer | Shozo Sasahara | 110 | 94 | 16 | 13 | 4 | 10 | 5 | 19 | Takashi Ono (5 medals) |
| 29 | 1956 Winter | Hiroshi Yoshizawa | 10 | 10 | 0 | 5 | 1 | 1 | Chiharu Igaya (1 medal) | ||
| 30 | 1956 Equestrian | Kunihiro Ohta | 2 | 2 | 0 | 1 | |||||
| 31 | 1952 Summer | Bunkichi Sawada | 69 | 58 | 11 | 13 | 1 | 6 | 2 | 9 | Tadao Uesako and Hiroshi Suzuki (2 medals) |
| 32 | 1952 Winter | 13 | 13 | 0 | 5 | ||||||
| 33 | 1936 Summer | Kenkichi Oshima | 220 | 201 | 19 | 14 | 6 | 4 | 10 | 20 | 4 athletes with 2 medals |
| 34 | 1936 Winter | Kazuyoshi Oimatsu | 31 | 30 | 1 | 7 | |||||
| 35 | 1932 Summer | Mikio Oda | 157 | 140 | 17 | 11 | 7 | 7 | 4 | 18 | Yasuji Miyazaki and Chuhei Nanbu (2 medals) |
| 36 | 1932 Winter | 16 | 16 | 0 | 5 | ||||||
| 37 | 1928 Summer | Yonetaro Nakazawa | 40 | 39 | 1 | 7 | 2 | 2 | 1 | 5 | Katsuo Takaishi (2 medals) |
| 38 | 1928 Winter | Subaru Takahashi | 6 | 6 | 0 | 3 | |||||
| 39 | 1924 Summer | 19 | 19 | 0 | 4 | 1 | 1 | Katsutoshi Naito (1 medal) | |||
| 40 | 1920 Summer | 15 | 15 | 0 | 4 | 2 | 2 | Ichiya Kumagae (2 medals) | |||
| 41 | 1912 Summer | Yahiko Mishima | 2 | 2 | 0 | 1 |