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
| width=78% align=left valign=top | Medal Name Sport Event Date Kōji Gushiken Gymnastics Men's individual all-around August 2 Takeo Kamachi Shooting Men's rapid fire pistol August 2 Atsuji Miyahara Wrestling Men's Greco-Roman flyweight August 2 Shinji Morisue Gymnastics Men's horizontal bar August 4 Kōji Gushiken Gymnastics Men's rings August 4 Shinji Hosokawa Judo Men extra lightweight August 4 Yoshiyuki Matsuoka Judo Men half lightweight August 5 Hitoshi Saito Judo Men heavyweight August 10 Yasuhiro Yamashita Judo Men's open category August 11 Hideaki Tomiyama Wrestling Men's freestyle bantamweight August 11 Masaki Eto Wrestling Men's Greco-Roman bantamweight August 3 Nobuyuki Kajitani Gymnastics Men's parallel bars August 4 Kōji Gushiken Gymnastics Men's vault August 4 Shinji Morisue Gymnastics Men's vault August 4 Takashi Irie Wrestling Men's freestyle light flyweight August 9 Kosei Akaishi Wrestling Men's freestyle featherweight August 9 Akira Ota Wrestling Men's freestyle light heavyweight August 9 Hideyuki Nagashima Wrestling Men's freestyle middleweight August 11 Kazushito Manabe Weightlifting Men's flyweight July 29 Masahiro Kotaka Weightlifting Men's bantamweight July 30 Kōji GushikenNoritoshi HirataNobuyuki KajitaniShinji MorisueKoji SotomuraKyoji Yamawaki Gymnastics Men's team all-around July 31 Ikuzo Saito Wrestling Men's Greco-Roman light flyweight August 1 Tsutomu Sakamoto Cycling Men's sprint August 3 Koji Sotomura Gymnastics Men's floor August 4 Kōji Gushiken Gymnastics Men's horizontal bar August 4 Ryoji Isaoka Weightlifting Men's light heavyweight August 4 Yumi EgamiNorie HiroMiyoko HiroseKyoko IshidaYoko KagabuYuko MitsuyaKeiko MiyajimaKimie MoritaKumi NakadaEmiko OdakaSachiko OtaniKayoko Sugiyama Volleyball Women's tournament August 7 Seiki Nose Judo Men's middleweight August 8 Saeko KimuraMiwako Motoyoshi Artistic swimming Women's duet August 9 Yuji Takada Wrestling Men's freestyle light flyweight August 10 Hiroshi Yamamoto Archery Men's individual August 11 Miwako Motoyoshi Artistic swimming Women's solo August 12
| width=22% align=left valign=top | Medals by sportSport TotalJudo 4 0 15Gymnastics 3 3 39Wrestling 2 5 29Shooting 1 0 01Weightlifting 0 0 33Artistic swimming 0 0 22Archery 0 0 11Cycling 0 0 11Volleyball 0 0 11 Total 10 8 14 32
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 (4th place) Minako Hokari – 2481 points (10th place)
Men's Individual Competition: Hiroshi Yamamoto – 2563 points (Bronze Medal) Takayoshi Matsushita – 2552 points (4th place) Ichiro Shimamura – 2312 points (52nd place)
Athletics
Men's 400 metres Susumu Takana Heat — 46.26 Quarterfinals — 45.91 Semifinals — 45.88 (→ did not advance)
Men's 10,000 metres Yutaka Kanai Qualifying Heat — 28:14.67 Final — 28:27.06 (→ 7th place)
Masanari Shintaku Qualifying Heat — 28:24.30 Final — 28:55.54 (→ 16th place)
Men's Marathon Takeshi So Final — 2:10:55 (→ 4th place)
Toshihiko Seko Final — 2:14:13 (→ 14th place)
Shigeru So Final — 2:14:38 (→ 17th place)
Men's Long Jump Junichi Usui Qualification — 8.02m Final — 7.87m (→ 7th place)
Men's High Jump Takao Sakamoto Qualification — 2.21m (→ did not advance)
Men's Javelin Throw Masami Yoshida Qualification — 81.42m Final — 81.98m (→ 5th place)
Kazuhiro Mizoguchi Qualification — 74.82m (→ did not advance, 20th place)
Men's Hammer Throw Shigenobu Murofushi Qualification — 70.92m (→ did not advance)
Men's Pole Vault Tomomi Takahashi Qualifying Round — 5.30m Final — no mark (→ no ranking)
Women's Marathon Nanae Sasaki Final — 2:37:04 (→ 19th place)
Akemi Masuda Final — did not finish (→ no ranking)
Women's High Jump Hisayo Fukumitsu Qualification — 1.87m (→ did not advance, 17th place)
Megumi Sato Qualification — 1.84m (→ did not advance, 18th place)
Women's Javelin Throw Emi Matsui Qualification — 57.72m (→ did not advance)
Minori Mori Qualification — 56.60m (→ did not advance)
Boxing
Men's Light Flyweight (– 48 kg) Mamoru Kuroiwa First Round — Bye Second Round — Defeated Francisco Tejedor (COL), 4:1 Quarterfinals — Lost to Keith Mwila (KEN), 0:5
Men's Bantamweight (– 54 kg) Hiroaki Takami First Round — Bye Second Round — Defeated Gamaleldin El-Koumy (EGY), 4:1 Third Round — Lost to Dale Walters (CAN), 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
Sprint Tsutomu Sakamoto Katsuo Nakatake
1000m time trial Tsutomu Sakamoto
Team pursuit Akio Kuwazawa Harumitsu Okada Mitsugi Sarudate Yoshihiro Tsumuraya
Points race Akio Kuwazawa Hitoshi Sato
Women's individual road race Wakako Abe — 40th place
Diving
Men's 3m Springboard Isao Yamagishi Preliminary Round — 427.14 (→ did not advance, 25th place)
Equestrianism
Fencing
Nine fencers, five men and four women, represented Japan in 1984.
Men's foil Kenichi Umezawa Nobuyuki Azuma Tadashi Shimokawa
Men's team foil Nobuyuki Azuma, Yoshihiko Kanatsu, Hidehachi Koyasu, Tadashi Shimokawa, Kenichi Umezawa
Women's foil Azusa Oikawa Mieko Miyahara Miyuki Maekawa
Women's team foil Mieko Miyahara, Azusa Oikawa, Miyuki Maekawa, Tomoko Oka
Gymnastics
Handball
Men's Team Competition Preliminary Round (Group A) Lost to Yugoslavia (15:32) Lost to Romania (22:28) Lost to Iceland (17:21) Lost to Switzerland (13:20) Defeated Algeria (17:16) Classification Match 9th/10th place: Lost to United States (16:24) → 10th place
Team Roster Seimei Gamo Takashi Ikenoue Yasou Ikona Hidetada Ito Koji Matsui Mitsuaki Nakamoto Kiyoshi Nishiyama Takahiro Ohata Nobuo Sasaki Kenzo Seki Yoshihiro Shiga Katsutoshi Taguchi Seiichi Takamura Yukihiko Uemura Shinji Yamamoto
Judo
Modern pentathlon
Three male pentathletes represented Japan in 1984.
Individual Shoji Uchida Hiroyuki Kawazoe Daizou Araki
Team Shoji Uchida Hiroyuki Kawazoe Daizou Araki
Rhythmic gymnastics
Rowing
Sailing
Shooting
Men AthleteEventFinalPointsRankHiroyuki Akatsuka25 m rapid fire pistol58323Norito Chosa 50 m rifle, prone58543Chikafumi Hirai50 m pistol55118Takeo Kamachi25 m rapid fire pistol595Ryohei Koba50 m rifle, three positions113725 10 m air rifle57818Kaoru Matsuo50 m rifle, three positions112535Hiroyuki Nakajo50 m rifle, prone59117 Shigetoshi Tashiro50 m pistol54029 Women AthleteEventFinalPointsRankKeiko Hirakawa25 m pistol56423Noriko Kosai50 m rifle, three positions5681110 m air rifle38310Atsuko Sugimoto25 m pistol56423 Open AthleteEventFinalPointsRankEigen HayashiSkeet18441Motoharu HiranoTrap18611Mikio ItakuraSkeet19213Kazumi WatanabeTrap18613
Swimming
Men's 100m Freestyle Shigeo Ogata Heat — 52.96 (→ did not advance, 33rd place)
Satoshi Sumida Heat — 53.83 (→ did not advance, 39th place)
Men's 200m Freestyle Hiroshi Sakamoto Heat — 1:54.71 (→ did not advance, 26th place)
Shigeo Ogata Heat — 1:55.97 (→ did not advance, 33rd place)
Men's 400m Freestyle Shigeo Ogata Heat — 4:02.97 (→ did not advance, 22nd place)
Keisuke Okuno Heat — 4:06.31 (→ did not advance, 27th place)
Men's 100m Backstroke Daichi Suzuki Heat — 58.37 B-Final — 58.30 (→ 11th place)
Men's 200m Backstroke Daichi Suzuki Heat — 2:06.24 B-Final — 2:06.02 (→ 16th place)
Men's 100m Breaststroke Shigehiro Takahashi Heat — 1:04.71 B-Final — 1:04.41 (→ 10th place)
Kenji Watanabe Heat — 1:06.10 (→ did not advance, 9th place)
Men's 200m Breaststroke Shigehiro Takahashi Heat — 2:19.98 B-Final — 2:20.93 (→ 12th place)
Kenji Watanabe Heat — 2:22.33 B-Final — 2:22.29 (→ 15th place)
Men's 100m Butterfly Taihei Saka Heat — 56.40 (→ did not advance, 21st place)
Shudo Kawawa Heat — 56.52 (→ did not advance, 23rd place)
Men's 200m Butterfly Taihei Saka Heat — 2:00.66 B-Final — 2:00.31 (→ 9th place)
Shudo Kawawa Heat — 2:03.07 (→ did not advance, 18th place)
Men's 200m Individual Medley Shinji Ito Heat — 2:07.76 B-Final — 2:06.07 (→ 10th place)
Men's 400m Individual Medley Shinji Ito Heat — 4:30.52 B-Final — 4:29.76 (→ 13th place)
Men's 4 × 100 m Freestyle Relay Hiroshi Sakamoto, Shigeo Ogata, Taihei Saka, and Satoshi Sumida Heat — 3:30.45 (→ did not advance, 13th place)
Men's 4 × 200 m Freestyle Relay Taihei Saka, Hiroshi Sakamoto, Keisuke Okuno, and Shigeo Ogata Heat — DSQ (→ did not advance, no ranking)
Men's 4 × 100 m Medley Relay Daichi Suzuki, Shigehiro Takahashi, Taihei Saka, and Hiroshi Sakamoto Heat — 3:50.14 Final — DSQ (→ no ranking)
Women's 100m Freestyle Kaori Yanase Heat — 58.47 (→ did not advance, 17th place)
Chikako Nakamori Heat — 59.00 (→ did not advance, 21st place)
Women's 200m Freestyle Chikako Nakamori Heat — 2:03.94 B-Final — 2:04.11 (→ 13th place)
Kaori Yanase Heat — 2:04.38 B-Final — 2:05.24 (→ 16th place)
Women's 400m Freestyle Chikako Nakamori Heat — 4:20.13 B-Final — 4:20.18 (→ 14th place)
Junko Sakurai Heat — 4:28.68 (→ did not advance, 19th place)
Women's 800m Freestyle Junko Sakurai Heat — 9:13.27 (→ did not advance, 18th place)
Women's 4 × 100 m Freestyle Relay Junko Sakurai, Chikako Nakamori, Miki Saito, and Kaori Yanase Heat — 3:54.68 (→ did not advance)
Women's 4 × 100 m Medley Relay Naomi Sekido, Hiroko Nagasaki, Naoko Kume, and Kaori Yanase Heat — 4:17.59 Final — DSQ (→ no ranking)
Women's 100m Backstroke Naomi Sekido Heat — 1:05.60 (→ did not advance, 18th place)
Nozomi Sunouchi Heat — 1:07.23 (→ did not advance, 23rd place)
Women's 200m Backstroke Naomi Sekido Heat — 2:18.52 B-Final — 2:18.87 (→ 14th place)
Nozomi Sunouchi Heat — 2:25.05 (→ did not advance, 22nd place)
Women's 200m Butterfly Naoko Kume Heat — 2:13.31 Final — 2:12.57 (→ 6th place)
Kiyomi Takahashi Heat — 2:14.37 B-Final — 2:16.27 (→ 12th place)
Women's 200m Individual Medley Hideka Koshimizu Heat — 2:23.38 B-Final — 2:22.81 (→ 15th place)
Women's 400m Individual Medley Hideka Koshimizu Heat — 4:59.18 B-Final — 4:58.02 (→ 14th place)
Synchronized swimming
Volleyball
Men's Team Competition Preliminary Round (Group B) Defeated China (3-0) Defeated Italy (3-2) Defeated Egypt (3-0) Lost to Canada (0-3) Classification Matches 5th/8th place: Lost to Argentina (1-3) 7th/8th place: Defeated China (3-0) → 7th place
Team Roster Koshi Sobu Eiji Shimomura Kazuya Mitake Eizaburo Mitsuhashi Hiroaki Okuno Yasushi Furukawa Shuji Yamada Mikiyasu Tanaka Kimio Sugimoto Minoru Iwata Akihiro Iwashima Shunichi Kawai
Women's Team Competition Preliminary Round (Group A) Defeated South Korea (3-1) Defeated Peru (3-0) Defeated Canada (3-0) Semi Finals Lost to China (0-3) Bronze Medal Match Defeated United States (3-1) → Bronze Medal
Team Roster Yumi Egami Kimie Morita Yuko Mitsuya Miyoko Hirose Kyoko Ishida Yoko Kagabu Norie Hiro Kayoko Sugiiyama Sachiko Otani Keiko Miyajima Emiko Odaka Kumie Nakada
Water polo
Men's Team Competition Preliminary Round (Group C) Lost to Italy (5-15) Lost to West Germany (8-15) Lost to Australia (2-15) Final Round (Group E) Lost to China (4-10) Lost to Greece (7-14) Lost to Canada (5-8) Defeated Brazil (9-8) → 11th place
Team Roster Etsuji Fujita Yoshifumi Saito Koshi Fujimori Shingo Kai Narihito Taima Daisuke Houki Toshio Fukumoto Toshiyuki Miyahara Hisayoshi Nagata Koji Wakayoshi Hisaharu Saito Shinji Yamasaki Asami Oura
Weightlifting
Wrestling
References