Japan at the 1984 Summer Olympics
Japan competed at the 1984 Summer Olympics in Los Angeles, United States. Japan returned to the Games after participating in the American-led boycott of the 1980 Summer Olympics. 226 competitors, 174 men and 52 women, took part in 147 events in 22 sports.
Medalists
| Medal | Name | Sport | Event |
| Kōji Gushiken | Gymnastics | Men's individual all-around | |
| Kōji Gushiken | Gymnastics | Men's rings | |
| Shinji Morisue | Gymnastics | Men's horizontal bar | |
| Shinji Hosokawa | Judo | Men extra lightweight | |
| Yoshiyuki Matsuoka | Judo | Men half lightweight | |
| Hitoshi Saito | Judo | Men heavyweight | |
| Yasuhiro Yamashita | Judo | Men's open category | |
| Atsuji Miyahara | Wrestling | Men's Greco-Roman flyweight | |
| Hideaki Tomiyama | Wrestling | Men's freestyle bantamweight | |
| Takeo Kamachi | Shooting | Men's rapid fire pistol | |
| Kōji Gushiken | Gymnastics | Men's vault | |
| Shinji Morisue | Gymnastics | Men's vault | |
| Nobuyuki Kajitani | Gymnastics | Men's parallel bars | |
| Masaki Eto | Wrestling | Men's Greco-Roman bantamweight | |
| Takashi Irie | Wrestling | Men's freestyle light flyweight | |
| Kosei Akaishi | Wrestling | Men's freestyle featherweight | |
| Hideyuki Nagashima | Wrestling | Men's freestyle middleweight | |
| Akira Ota | Wrestling | Men's freestyle light heavyweight | |
| Hiroshi Yamamoto | Archery | Men's individual | |
| Tsutomu Sakamoto | Cycling | Men's sprint | |
| Yumi Egami Norie Hiro Miyoko Hirose Kyoko Ishida Yoko Kagabu Yuko Mitsuya Keiko Miyajima Kimie Morita Kumi Nakada Emiko Odaka Sachiko Otani Kayoko Sugiyama | Volleyball | Women's tournament | |
| Kōji Gushiken | Gymnastics | Men's horizontal bar | |
| Koji Sotomura | Gymnastics | Men's floor | |
| Kōji Gushiken Noritoshi Hirata Nobuyuki Kajitani Shinji Morisue Koji Sotomura Kyoji Yamawaki | Gymnastics | Men's team all-around | |
| Seiki Nose | Judo | Men's middleweight | |
| Miwako Motoyoshi | Synchronized swimming | Women's solo | |
| Saeko Kimura Miwako Motoyoshi | Synchronized swimming | Women's duet | |
| Kazushito Manabe | Weightlifting | Men's flyweight | |
| Masahiro Kotaka | Weightlifting | Men's bantamweight | |
| Ryoji Isaoka | Weightlifting | Men's light heavyweight | |
| Ikuzo Saito | Wrestling | Men's Greco-Roman light flyweight | |
| Yuji Takada | Wrestling | Men's freestyle light flyweight |
Archery
In their third Olympic archery competition, Japan won a bronze medal in the men's division as well as having a fourth place competitor in each division.Women's Individual Competition:
- Hiroko Ishizu - 2525 points
- Minako Hokari - 2481 points
- Hiroshi Yamamoto - 2563 points
- Takayoshi Matsushita - 2552 points
- Ichiro Shimamura - 2312 points
Athletics
- Susumu Takana
Men's Marathon
Men's Long Jump
Men's High Jump
Men's Javelin Throw
Men's Hammer Throw
Men's Pole Vault
Women's Marathon
Women's High Jump
Women's Javelin Throw
- Emi Matsui
- Minori Mori
Boxing
- Mamoru Kuroiwa
- # First Round — Bye
- # Second Round — Defeated Francisco Tejedor, 4:1
- # Quarterfinals — Lost to Keith Mwila, 0:5
- Hiroaki Takami
- # First Round — Bye
- # Second Round — Defeated Gamaleldin El-Koumy, 4:1
- # Third Round — Lost to Dale Walters, 0:5
Canoeing
Cycling
Nine cyclists, eight men and one woman, represented Japan in 1984. Tsutomu Sakamoto won a bronze medal in the sprint event.;Men's individual road race
- Matsuyoshi Takahashi — 45th place
- Tsutomu Sakamoto
- Katsuo Nakatake
- Tsutomu Sakamoto
;Points race
- Akio Kuwazawa
- Hitoshi Sato
- Wakako Abe — 40th place
Diving
- Isao Yamagishi
Equestrianism
Fencing
Nine fencers, five men and four women, represented Japan in 1984.;Men's foil
;Men's team foil
- Nobuyuki Azuma, Yoshihiko Kanatsu, Hidehachi Koyasu, Tadashi Shimokawa, Kenichi Umezawa
;Women's team foil
- Mieko Miyahara, Azusa Oikawa, Miyuki Maekawa, Tomoko Oka
Gymnastics
Handball
;Men's Team Competition- Preliminary Round
- Classification Match
- Team Roster
Judo
Modern pentathlon
Three male pentathletes represented Japan in 1984.;Individual
;Team
- Shoji Uchida
- Hiroyuki Kawazoe
- Daizou Araki
Rhythmic gymnastics
Rowing
Sailing
Shooting
;Men;Women
;Open
Swimming
Men's 100m Freestyle- Shigeo Ogata
- Satoshi Sumida
- Hiroshi Sakamoto
- Shigeo Ogata
- Shigeo Ogata
- Keisuke Okuno
- Daichi Suzuki
- Daichi Suzuki
- Shigehiro Takahashi
- Kenji Watanabe
- Shigehiro Takahashi
- Kenji Watanabe
- Taihei Saka
- Shudo Kawawa
- Taihei Saka
- Shudo Kawawa
- Shinji Ito
- Shinji Ito
- Hiroshi Sakamoto, Shigeo Ogata, Taihei Saka, and Satoshi Sumida
- Taihei Saka, Hiroshi Sakamoto, Keisuke Okuno, and Shigeo Ogata
- Daichi Suzuki, Shigehiro Takahashi, Taihei Saka, and Hiroshi Sakamoto
- Kaori Yanase
- Chikako Nakamori
- Chikako Nakamori
- Kaori Yanase
- Chikako Nakamori
- Junko Sakurai
- Junko Sakurai
- Junko Sakurai, Chikako Nakamori, Miki Saito, and Kaori Yanase
- Naomi Sekido, Hiroko Nagasaki, Naoko Kume, and Kaori Yanase
- Naomi Sekido
- Nozomi Sunouchi
- Naomi Sekido
- Nozomi Sunouchi
- Naoko Kume
- Kiyomi Takahashi
- Hideka Koshimizu
- Hideka Koshimizu
Synchronized swimming
Volleyball
;Men's Team Competition- Preliminary Round
- Classification Matches
- Team Roster
- Preliminary Round
- Semi Finals
- Bronze Medal Match
- Team Roster
Water polo
- Preliminary Round
- Final Round
- Team Roster
Weightlifting