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.^[1]

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)

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)

Men's Light Flyweight (– 48 kg)

• Mamoru Kuroiwa
  1. First Round — Bye
  2. Second Round — Defeated Francisco Tejedor (COL), 4:1
  3. Quarterfinals — Lost to Keith Mwila (KEN), 0:5

Men's Bantamweight (– 54 kg)

• Hiroaki Takami
  1. First Round — Bye
  2. Second Round — Defeated Gamaleldin El-Koumy (EGY), 4:1
  3. Third Round — Lost to Dale Walters (CAN), 0:5

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

Men's 3m Springboard

• Isao Yamagishi

• Preliminary Round — 427.14 (→ did not advance, 25th place)

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

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

Three male pentathletes represented Japan in 1984.

Individual

• Shoji Uchida
• Hiroyuki Kawazoe
• Daizou Araki

Team

• Shoji Uchida
• Hiroyuki Kawazoe
• Daizou Araki

Men

More information Athlete, Event ...

Athlete	Event	Final
		Points	Rank
Hiroyuki Akatsuka	25 m rapid fire pistol	583	23
Norito Chosa	50 m rifle, prone	585	43
Chikafumi Hirai	50 m pistol	551	18
Takeo Kamachi	25 m rapid fire pistol	595
Ryohei Koba	50 m rifle, three positions	1137	25
	10 m air rifle	578	18
Kaoru Matsuo	50 m rifle, three positions	1125	35
Hiroyuki Nakajo	50 m rifle, prone	591	17
Shigetoshi Tashiro	50 m pistol	540	29

Close

Women

Open

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)

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

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