# Japan at the 2012 Summer Olympics

Japan, represented by Japanese Olympic Committee, competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. Despite being London's third Olympic Games, Japan marked their London debut at this games. The nation also celebrated its centennial anniversary in the Olympics, having participated at every games since 1912 except for two editions; it was not invited to the 1948 Summer Olympics in London for its role in World War II, and was also part of the US-led boycott of the 1980 Summer Olympics in Moscow. Japan sent a total of 295 athletes to the Games, 138 men and 157 women, to compete in 24 sports.
Japan left London with a total of 38 medals (7 gold, 14 silver, and 17 bronze), finishing eleventh in the gold medal rankings and sixth in the overall medal rankings. This was also the nation's most successful Olympics, winning the largest number of medals in non-boycotted games. Eleven of these medals were awarded to the athletes in swimming, seven in judo, six in wrestling, and three in gymnastics. Five Japanese athletes won more than a single Olympic medal in London. With the absence of baseball and softball at the Olympics, Japan's team-based athletes proved successful in London, as women's football and women's volleyball teams won silver and bronze medals, respectively. For the first time since 1968, Japan had won two Olympic medals in men's boxing.
Among the nation's medalists were freestyle wrestlers Kaori Icho and Saori Yoshida, who successfully defended their Olympic titles in their respective events. Two-time Olympic silver medalist and gymnast Kōhei Uchimura won the coveted gold medal in individual all-around, becoming the fourth Japanese man to claim the title after 28 years. Meanwhile, Ryōta Murata became the first Japanese boxer to win an Olympic gold medal since 1960, in the men's middleweight division. Defending swimming champion Kosuke Kitajima, who aimed to win gold in two breaststroke events for third Games in succession, missed out on the medal standings in the finals.

## Medalists

The following Japanese competitors won medals at the Games. In the by discipline sections below, medalists' names are bolded.
| Medal | Name | Sport | Event | Date |
| Gold | Kaori Matsumoto | Judo | Women's 57 kg | 30 July |
| Gold | Kōhei Uchimura | Gymnastics | Men's artistic individual all-around | 1 August |
| Gold | Hitomi Obara | Wrestling | Women's freestyle 48 kg | 8 August |
| Gold | Kaori Icho | Wrestling | Women's freestyle 63 kg | 8 August |
| Gold | Saori Yoshida | Wrestling | Women's freestyle 55 kg | 9 August |
| Gold | Ryōta Murata | Boxing | Men's middleweight | 11 August |
| Gold | Tatsuhiro Yonemitsu | Wrestling | Men's freestyle 66 kg | 12 August |
| Silver | Hiroaki Hiraoka | Judo | Men's 60 kg | 28 July |
| Silver | Hiromi Miyake | Weightlifting | Women's 48 kg | 28 July |
| Silver | Riki Nakaya | Judo | Men's 73 kg | 30 July |
| Silver | Ryohei Kato Kazuhito Tanaka Yusuke Tanaka Kōhei Uchimura Koji Yamamuro | Gymnastics | Men's artistic team all-around | 30 July |
| Silver | Satomi Suzuki | Swimming | Women's 200 m breaststroke | 2 August |
| Silver | Ryosuke Irie | Swimming | Men's 200 m backstroke | 2 August |
| Silver | Takaharu Furukawa | Archery | Men's individual | 3 August |
| Silver | Mika Sugimoto | Judo | Women's +78 kg | 3 August |
| Silver | Ryosuke Irie Kosuke Kitajima Takeshi Matsuda Takuro Fujii | Swimming | Men's 4 × 100 m medley relay | 4 August |
| Silver | Mizuki Fujii Reika Kakiiwa | Badminton | Women's doubles | 4 August |
| Silver | Kōhei Uchimura | Gymnastics | Men's floor | 5 August |
| Silver | Suguru Awaji Kenta Chida Ryo Miyake Yuki Ota | Fencing | Men's team foil | 5 August |
| Silver | Kasumi Ishikawa Ai Fukuhara Sayaka Hirano | Table tennis | Women's team | 7 August |
| Silver | Miho Fukumoto Ayumi Kaihori Yukari Kinga Azusa Iwashimizu Saki Kumagai Aya Sameshima Kyoko Yano Mizuho Sakaguchi Aya Miyama (c) Nahomi Kawasumi Homare Sawa Asuna Tanaka Kozue Ando Shinobu Ohno Karina Maruyama Megumi Takase Mana Iwabuchi Yūki Ōgimi | Football | Women's tournament | 9 August |
| Bronze | Kosuke Hagino | Swimming | Men's 400 m individual medley | 28 July |
| Bronze | Masashi Ebinuma | Judo | Men's 66 kg | 29 July |
| Bronze | Kaori Kawanaka Ren Hayakawa Miki Kanie | Archery | Women's team | 29 July |
| Bronze | Aya Terakawa | Swimming | Women's 100 m backstroke | 30 July |
| Bronze | Ryosuke Irie | Swimming | Men's 100 m backstroke | 30 July |
| Bronze | Satomi Suzuki | Swimming | Women's 100 m breaststroke | 30 July |
| Bronze | Yoshie Ueno | Judo | Women's 63 kg | 31 July |
| Bronze | Takeshi Matsuda | Swimming | Men's 200 m butterfly | 31 July |
| Bronze | Masashi Nishiyama | Judo | Men's 90 kg | 1 August |
| Bronze | Ryo Tateishi | Swimming | Men's 200 m breaststroke | 1 August |
| Bronze | Natsumi Hoshi | Swimming | Women's 200 m butterfly | 1 August |
| Bronze | Aya Terakawa Satomi Suzuki Yuka Kato Haruka Ueda | Swimming | Women's 4 × 100 m medley relay | 4 August |
| Bronze | Koji Murofushi | Athletics | Men's hammer throw | 5 August |
| Bronze | Ryūtarō Matsumoto | Wrestling | Men's Greco-Roman 60 kg | 6 August |
| Bronze | Satoshi Shimizu | Boxing | Men's bantamweight | 10 August |
| Bronze | Shinichi Yumoto | Wrestling | Men's freestyle 55 kg | 10 August |
| Bronze | Hitomi Nakamichi Yoshie Takeshita Mai Yamaguchi Erika Araki (c) Kaori Inoue Maiko Kano Yuko Sano Ai Otomo Risa Shinnabe Saori Sakoda Yukiko Ebata Saori Kimura | Volleyball | Women's tournament | 11 August |
Medals by sport :
| Sport | | | | Total |
| Wrestling | 4 | 0 | 2 | 6 |
| Judo | 1 | 3 | 3 | 7 |
| Gymnastics | 1 | 2 | 0 | 3 |
| Boxing | 1 | 0 | 1 | 2 |
| Swimming | 0 | 3 | 8 | 11 |
| Archery | 0 | 1 | 1 | 2 |
| Badminton | 0 | 1 | 0 | 1 |
| Weightlifting | 0 | 1 | 0 | 1 |
| Fencing | 0 | 1 | 0 | 1 |
| Table tennis | 0 | 1 | 0 | 1 |
| Football | 0 | 1 | 0 | 1 |
| Athletics | 0 | 0 | 1 | 1 |
| Volleyball | 0 | 0 | 1 | 1 |
| Total | 7 | 14 | 17 | 38 |
Medals by gender :
| Gender | | | | Total |
| Female | 4 | 6 | 7 | 17 |
| Male | 3 | 8 | 10 | 21 |
| Total | 7 | 14 | 17 | 38 |

## Delegation

Japanese Olympic Committee (JOC) selected a team of 295 athletes, 138 men and 157 women, to compete in all sports except basketball, and handball; it was the nation's fifth-largest team sent to the Olympics, but the smallest since the 2000 Summer Olympics in Sydney. For the second time in its Olympic history, Japan was represented by more female than male athletes. There was only a single competitor in diving and in equestrian dressage.
The Japanese team included several past Olympic champions, three of them defending (freestyle wrestlers Kaori Icho and Saori Yoshida, and breaststroke swimmer Kosuke Kitajima). Yoshida, who won two consecutive gold medals in the Olympics before, became Japan's third female flag bearer at the opening ceremony since 2004, and the sixth in Olympic history. Javelin thrower and one-time world and Asian champion Yukifumi Murakami, on the other hand, served as the nation's team captain.
Dressage rider Hiroshi Hoketsu repeated his record from Beijing, as the oldest athlete to compete in these Olympic Games, at age 71. Single sculls rower Daisaku Takeda and show jumper Taizo Sugitani made their fifth appearance, having participated at every Olympic Games since 1996. Hammer thrower and former Olympic gold medalist Koji Murofushi, along with swimmer Kosuke Kitajima, was among the Japanese athletes who competed at their fourth Olympics. Meanwhile, breaststroke swimmer Kanako Watanabe, at age 15, was the youngest athlete of the team.
Other Japanese athletes featured gymnast and two-time Olympic silver medalist Kōhei Uchimura, javelin thrower and world junior champion Genki Dean, who embraced his British roots to represent the nation, table tennis player Ai Fukuhara, who became highly popular in China and Japan because of her nickname "China-dolls", and swimmers Ryosuke Irie and Takeshi Matsuda, who previously won the bronze medal in Beijing.
| Sport | Men | Women | Total |
| Archery | 3 | 3 | 6 |
| Athletics | 28 | 18 | 46 |
| Badminton | 6 | 5 | 11 |
| Boxing | 4 | 0 | 4 |
| Canoeing | 5 | 3 | 8 |
| Cycling | 6 | 3 | 9 |
| Diving | 0 | 1 | 1 |
| Equestrian | 7 | 1 | 8 |
| Fencing | 3 | 5 | 8 |
| Field hockey | 0 | 16 | 16 |
| Football | 18 | 18 | 36 |
| Gymnastics | 7 | 12 | 19 |
| Judo | 7 | 7 | 14 |
| Modern pentathlon | 1 | 2 | 3 |
| Rowing | 2 | 3 | 5 |
| Sailing | 5 | 4 | 9 |
| Shooting | 2 | 2 | 4 |
| Swimming | 14 | 15 | 29 |
| Synchronized swimming | 0 | 9 | 9 |
| Table tennis | 3 | 3 | 6 |
| Taekwondo | 0 | 2 | 2 |
| Tennis | 3 | 0 | 3 |
| Triathlon | 2 | 3 | 5 |
| Volleyball | 2 | 14 | 16 |
| Weightlifting | 1 | 4 | 5 |
| Wrestling | 9 | 4 | 13 |
| Total | 138 | 157 | 295 |

## Archery

Japan has qualified one archer for the men's individual event and one archer for the women's individual event

### Men

| Athlete | Event | Ranking round | Ranking round | Round of 64 | Round of 32 | Round of 16 | Quarterfinals | Semifinals | Final / BM | Final / BM |
| Athlete | Event | Score | Seed | Opposition Score | Opposition Score | Opposition Score | Opposition Score | Opposition Score | Opposition Score | Rank |
| Takaharu Furukawa | Individual | 679 | 5 | Lee K W (HKG) (60) W 6–4 | Hrachov (UKR) (28) W 6–4 | Nesteng (NOR) (21) W 6–2 | Mohamad (MAS) (20) W 6–2 | van der Ven (NED) (16) W 6–5 | Oh (KOR) (3) L 1–7 | |
| Yu Ishizu | Individual | 671 | 15 | Terry (GBR) (50) L 1–7 | did not advance | did not advance | did not advance | did not advance | did not advance | did not advance |
| Hideki Kikuchi | Individual | 659 | 44 | Nesteng (NOR) (21) L 5–6 | did not advance | did not advance | did not advance | did not advance | did not advance | did not advance |
| Takaharu Furukawa Yu Ishizu Hideki Kikuchi | Team | 2009 | 5 | — | — | India (IND) (12) W 214 (29)–214 (27) | United States (USA) (4) L 219–220 | did not advance | did not advance | did not advance |

### Women

| Athlete | Event | Ranking round | Ranking round | Round of 64 | Round of 32 | Round of 16 | Quarterfinals | Semifinals | Final / BM | Final / BM |
| Athlete | Event | Score | Seed | Opposition Score | Opposition Score | Opposition Score | Opposition Score | Opposition Score | Opposition Score | Rank |
| Ren Hayakawa | Individual | 654 | 16 | Bjerendal (SWE) (49) W 6–4 | Stepanova (RUS) (17) W 7–3 | Ki B-b (KOR) (1) L 0–6 | did not advance | did not advance | did not advance | did not advance |
| Miki Kanie | Individual | 665 | 6 | Dorokhova (UKR) (59) W 7–1 | Xu J (CHN) (27) W 6–0 | Román (MEX) (11) L 3–7 | did not advance | did not advance | did not advance | did not advance |
| Kaori Kawanaka | Individual | 646 | 28 | Schuh (FRA) (37) L 2–6 | did not advance | did not advance | did not advance | did not advance | did not advance | did not advance |
| Ren Hayakawa Miki Kanie Kaori Kawanaka | Team | 1965 | 5 | — | — | Ukraine (UKR) (12) W 207–192 | Mexico (MEX) (4) W 219–209 | South Korea (KOR) (1) L 206–221 | Russia (RUS) (6) W 209–207 | |

## Athletics

Japanese athletes have so far achieved qualifying standards in the following athletics events (up to a maximum of 3 athletes in each event at the 'A' Standard, and 1 at the 'B' Standard):

### Key

* Note–Ranks given for track events are within the athlete's heat only
* Q = Qualified for the next round
* q = Qualified for the next round as a fastest loser or, in field events, by position without achieving the qualifying target
* NR = National record
* N/A = Round not applicable for the event
* Bye = Athlete not required to compete in round

### Track & road events

| Athlete | Event | Heat | Heat | Quarterfinal | Quarterfinal | Semifinal | Semifinal | Final | Final |
| Athlete | Event | Result | Rank | Result | Rank | Result | Rank | Result | Rank |
| Masashi Eriguchi | 100 m | Bye | Bye | 10.30 | 6 | Did not advance | Did not advance | Did not advance | Did not advance |
| Isamu Fujisawa | 20 km walk | — | — | — | — | — | — | 1:21:48 | 18 |
| Arata Fujiwara | Marathon | — | — | — | — | — | — | 2:19:11 | 45 |
| Shota Iizuka | 200 m | 20.81 | 5 | — | — | Did not advance | Did not advance | Did not advance | Did not advance |
| Yuzo Kanemaru | 400 m | 46.01 | 4 | — | — | Did not advance | Did not advance | Did not advance | Did not advance |
| Takayuki Kishimoto | 400 m hurdles | DSQ | DSQ | — | — | Did not advance | Did not advance | Did not advance | Did not advance |
| Koichiro Morioka | 50 km walk | — | — | — | — | — | — | 3:43:14 | 10 |
| Kentaro Nakamoto | Marathon | — | — | — | — | — | — | 2:11:16 | 6 |
| Akihiko Nakamura | 400 m hurdles | DSQ | DSQ | — | — | Did not advance | Did not advance | Did not advance | Did not advance |
| Takumi Saito | 20 km walk | — | — | — | — | — | — | 1:22:43 | 25 |
| Yuki Sato | 5000 m | 13:38.22 | 11 | — | — | — | — | Did not advance | Did not advance |
| Yuki Sato | 10,000 m | — | — | — | — | — | — | 28:44.06 | 22 |
| Yusuke Suzuki | 20 km walk | — | — | — | — | — | — | 1:23:53 | 36 |
| Shinji Takahira | 200 m | 20.57 | 3 Q | — | — | 20.77 | 6 | Did not advance | Did not advance |
| Kei Takase | 200 m | 20.72 | 2 Q | — | — | 20.70 | 8 | Did not advance | Did not advance |
| Takayuki Tanii | 50 km walk | — | — | — | — | — | — | DNF | DNF |
| Tetsuya Tateno | 400 m hurdles | 49.95 | 4 | — | — | Did not advance | Did not advance | Did not advance | Did not advance |
| Ryota Yamagata | 100 m | Bye | Bye | 10.07 | 2 Q | 10.10 | 6 | did not advance | did not advance |
| Ryo Yamamoto | Marathon | — | — | — | — | — | — | 2:18:34 | 40 |
| Yuki Yamazaki | 50 km walk | — | — | — | — | — | — | DSQ | DSQ |
| Masato Yokota | 800 m | 1:48.48 | 4 | — | — | Did not advance | Did not advance | Did not advance | Did not advance |
| Masashi Eriguchi Shota Iizuka Takumi Kuki Shinji Takahira Ryota Yamagata | 4 × 100 m relay | 38.07 | 2 Q | — | — | — | — | 38.35 | 5 |
| Yoshihiro Azuma Yuzo Kanemaru Hiroyuki Nakano Kei Takase | 4 × 400 m relay | 3:03.86 | 6 | — | — | — | — | Did not advance | Did not advance |

### Field events

| Athlete | Event | Qualification | Qualification | Final | Final |
| Athlete | Event | Distance | Position | Distance | Position |
| Genki Dean | Javelin throw | 82.07 | 7 Q | 79.95 | 10 |
| Yukifumi Murakami | Javelin throw | 77.80 | 24 | Did not advance | Did not advance |
| Koji Murofushi | Hammer throw | 78.48 | 2 Q | 78.71 | |
| Seito Yamamoto | Pole vault | NM | — | Did not advance | Did not advance |

### Combined events – Decathlon

| Athlete | Event | 100 m | LJ | SP | HJ | 400 m | 110H | DT | PV | JT | 1500 m | Final | Rank |
| Keisuke Ushiro | Result | 11.32 | 6.86 | 13.59 | 1.99 | 50.78 | 15.47 | 46.66 | 4.90 | 66.38 | 4:39.33 | 7842 | 20 |
| Keisuke Ushiro | Points | 791 | 781 | 703 | 794 | 779 | 794 | 801 | 880 | 834 | 685 | 7842 | 20 |

### Track & road events

| Athlete | Event | Heat | Heat | Quarterfinal | Quarterfinal | Semifinal | Semifinal | Final | Final |
| Athlete | Event | Result | Rank | Result | Rank | Result | Rank | Result | Rank |
| Masumi Fuchise | 20 km walk | — | — | — | — | — | — | 1:28:41 | 11 |
| Kayoko Fukushi | 10000 m | — | — | — | — | — | — | 31:10.35 | 10 |
| Chisato Fukushima | 100 m | Bye | Bye | 11.41 | 5 | Did not advance | Did not advance | Did not advance | Did not advance |
| Chisato Fukushima | 200 m | 24.14 | 7 | — | — | Did not advance | Did not advance | Did not advance | Did not advance |
| Mayumi Kawasaki | 20 km walk | — | — | — | — | — | — | 1:30:20 | 18 |
| Ayako Kimura | 100 m hurdles | 13.75 | 7 | — | — | Did not advance | Did not advance | Did not advance | Did not advance |
| Ryoko Kizaki | Marathon | — | — | — | — | — | — | 2:27:16 | 16 |
| Satomi Kubokura | 400 m hurdles | 55.85 | 5 q | — | — | 56.25 | 8 | Did not advance | Did not advance |
| Hitomi Niiya | 10,000 m | — | — | — | — | — | — | 30:59.19 | 9 |
| Kumi Otoshi | 20 km walk | — | — | — | — | — | — | 1:33:50 | 37 |
| Yoshimi Ozaki | Marathon | — | — | — | — | — | — | 2:27:43 | 19 |
| Risa Shigetomo | Marathon | — | — | — | — | — | — | 2:40:06 | 79 |
| Mika Yoshikawa | 5000 m | 15:16.77 | 13 | — | — | — | — | Did not advance | Did not advance |
| Mika Yoshikawa | 10000 m | — | — | — | — | — | — | 31:47.67 | 16 |
| Anna Doi Chisato Fukushima Kana Ichikawa Yumeka Sano Momoko Takahashi | 4 × 100 m relay | 44.25 | 8 | — | — | — | — | Did not advance | Did not advance |

### Field events

| Athlete | Event | Qualification | Qualification | Final | Final |
| Athlete | Event | Distance | Position | Distance | Position |
| Tomomi Abiko | Pole vault | 4.25 | =19 | Did not advance | Did not advance |
| Yuki Ebihara | Javelin throw | 59.25 | 16 | Did not advance | Did not advance |

## Badminton
### Men

| Athlete | Event | Group stage | Group stage | Group stage | Group stage | Elimination | Quarterfinal | Semifinal | Final / BM | Final / BM |
| Athlete | Event | Opposition Score | Opposition Score | Opposition Score | Rank | Opposition Score | Opposition Score | Opposition Score | Opposition Score | Rank |
| Sho Sasaki | Singles | Soeroredjo (SUR) W 21–12, 21–7 | — | — | 1 Q | Cordón (GUA) W 23–21, 21–10 | Lin D (CHN) L 12–21, 21–16, 16–21 | Did not advance | Did not advance | Did not advance |
| Kenichi Tago | Singles | Karunaratne (SRI) L 18–21, 16–21 | — | — | 2 | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance |
| Naoki Kawamae Shoji Sato | Doubles | Koo K K / Tan B H (MAS) L 12–21, 14–21 | Jung J-s / Lee Y-d (KOR) L 21–16, 21–15 | Bach / Gunawan (USA) W 21–15, 21–15 | 3 | — | Did not advance | Did not advance | Did not advance | Did not advance |

### Women

| Athlete | Event | Group stage | Group stage | Group stage | Group stage | Elimination | Quarterfinal | Semifinal | Final / BM | Final / BM |
| Athlete | Event | Opposition Score | Opposition Score | Opposition Score | Rank | Opposition Score | Opposition Score | Opposition Score | Opposition Score | Rank |
| Sayaka Sato | Singles | Egelstaff (GBR) W 18–21, 21–16, 21-12 | Tvrdy (SLO) W 22–20, 21–18 | — | 1 Q | Baun (DEN) W 15–14$^{ret}$ | Retired | Retired | Retired | Retired |
| Mizuki Fujii Reika Kakiiwa | Doubles | Gutta / Ponnappa (IND) W 21–16, 21–18 | Cheng W-h / Chien Y-c (TPE) L 19–21, 11–21 | Sari / Yao L (SIN) W 16–21, 21–10, 21–19 | 2 Q | — | Juhl / Pedersen (DEN) W 22–20, 21–10 | Bruce / Li (CAN) W 21–12, 19–21, 21–13 | Tian Q / Zhao Yl (CHN) L 10–21, 23–25 | |
| Miyuki Maeda Satoko Suetsuna | Doubles | Tian Q / Zhao Yl (CHN) L 16–21, 17–21 | Poon L Y / Tse Y S (HKG) W 21–15, 21–19 | Pedersen / Juhl (DEN) W 18–21, 21–14, 21–18 | 3 | — | Did not advance | Did not advance | Did not advance | Did not advance |

### Mixed

| Athlete | Event | Group stage | Group stage | Group stage | Group stage | Quarterfinal | Semifinal | Final / BM | Final / BM |
| Athlete | Event | Opposition Score | Opposition Score | Opposition Score | Rank | Opposition Score | Opposition Score | Opposition Score | Rank |
| Shintaro Ikeda Reiko Shiota | Doubles | Fischer Nielsen / Pedersen (DEN) L 11–21, 10–21 | Mateusiak / Zięba (POL) L 18–21, 20–22 | Ng / Gao (CAN) W 21–10, 11–21, 21–15 | 3 | Did not advance | Did not advance | Did not advance | Did not advance |

## Boxing

Japan has so far qualified boxers for the following events

### Men

| Athlete | Event | Round of 32 | Round of 16 | Quarterfinals | Semifinals | Final | Final |
| Athlete | Event | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Rank |
| Katsuaki Susa | Flyweight | Ramírez (CUB) L 14–13 | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance |
| Satoshi Shimizu | Bantamweight | Dogboe (GHA) W 10–9 | Abdulhamidov (AZE) W RSC | Ouadahi (ALG) W 17–15 | Campbell (GBR) L 11–20 | Did not advance | |
| Yasuhiro Suzuki | Welterweight | Khalsi (MAR) W 14–13 | Sapiyev (KAZ) L 25–11 | Did not advance | Did not advance | Did not advance | Did not advance |
| Ryota Murata | Middleweight | Bye | Rahou (ALG) W 21–12 | Kılıççı (TUR) W 17–13 | Atoev (UZB) W 13–12 | Falcão (BRA) W 14–13 | |

## Canoeing
### Slalom

Japan has qualified boats for the following events
| Athlete | Event | Preliminary | Preliminary | Preliminary | Preliminary | Preliminary | Preliminary | Semifinal | Semifinal | Final | Final |
| Athlete | Event | Run 1 | Rank | Run 2 | Rank | Total | Rank | Time | Rank | Time | Rank |
| Takuya Haneda | Men's C-1 | 101.13 | 12 | 92.72 | 2 | 92.72 | 3 Q | 104.16 | 6 Q | 110.62 | 7 |
| Kazuki Yazawa | Men's K-1 | 96.66 | 18 | 92.57 | 13 | 92.57 | 15 Q | 99.99 | 9 Q | 104.44 | 9 |
| Moe Kaifuchi | Women's K-1 | 171.63 | 19 | 121.29 | 17 | 121.29 | 19 | Did not advance – Report | Did not advance – Report | Did not advance – Report | Did not advance – Report |

### Sprint

Japan has qualified boats for the following events
| Athlete | Event | Heats | Heats | Semifinals | Semifinals | Final | Final |
| Athlete | Event | Time | Rank | Time | Rank | Time | Rank |
| Momotaro Matsushita | Men's K-1 200 m | 36.096 | 3 Q | 37.201 | 7 FB | 38.040 | 11 |
| Naoya Sakamoto | Men's C-1 200 m | 41.528 | 3 Q | 41.771 | 3 FA | 44.699 | 8 |
| Momotaro Matsushita Hiroki Watanabe | Men's K-2 200 m | 34.669 | 6 FB | Bye | Bye | 35.739 | 10 |
| Shinobu Kitamoto | Women's K-1 200 m | 42.007 | 1 Q | 41.816 | 3 FB | 45.387 | 13 |
| Shinobu Kitamoto Asumi Ōmura | Women's K-2 500 m | 1:47.323 | 6 | Did not advance | Did not advance | Did not advance | Did not advance |
Qualification Legend: FA = Qualify to final (medal); FB = Qualify to final B (non-medal)

## Cycling

Japan had qualified the following cyclists for the Games.

### Road

| Athlete | Event | Time | Rank |
| Yukiya Arashiro | Men's road race | 5:46:37 | 48 |
| Fumiyuki Beppu | Men's road race | 5:46:05 | 22 |
| Fumiyuki Beppu | Men's time trial | 55:40.64 | 24 |
| Mayuko Hagiwara | Women's road race | Did not finish | Did not finish |

### Track
#### Sprint

| Athlete | Event | Qualification | Qualification | Round 1 | Repechage 1 | Round 2 | Repechage 2 | Quarterfinals | Semifinals | Final | Final |
| Athlete | Event | Time Speed (km/h) | Rank | Opposition Time Speed (km/h) | Opposition Time Speed (km/h) | Opposition Time Speed (km/h) | Opposition Time Speed (km/h) | Opposition Time Speed (km/h) | Opposition Time Speed (km/h) | Opposition Time Speed (km/h) | Rank |
| Seiichiro Nakagawa | Men's sprint | 10.144 70.977 | 7 | Watkins (USA) L | Zieliński (POL) W 10.792 66.716 | Baugé (FRA) L | Canelón (VEN) Awang (MAS) L | Did not advance | Did not advance | 9th place final Kelemen (CZE) Esterhuizen (RSA) Canelón (VEN) W 10.950 | 9 |
| Kayono Maeda | Women's sprint | 11.600 62.068 | 17 | Meares (AUS) L | Sullivan (CAN) Lee H-j (KOR) L | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance |

#### Team sprint

| Athlete | Event | Qualification | Qualification | Semifinals | Semifinals | Final | Final |
| Athlete | Event | Time Speed (km/h) | Rank | Opposition Time Speed (km/h) | Rank | Opposition Time Speed (km/h) | Rank |
| Seiichiro Nakagawa Yudai Nitta Kazunari Watanabe | Men's team sprint | 44.324 60.915 | 8 Q | Great Britain (GBR) L 43.964 61.413 | 8 | Did not advance | Did not advance |

#### Keirin

| Athlete | Event | 1st round | Repechage | 2nd round | Final |
| Athlete | Event | Rank | Rank | Rank | Rank |
| Kazunari Watanabe | Men's keirin | 6 R | 1 Q | 6 | 11 |

### Mountain biking

| Athlete | Event | Time | Rank |
| Kohei Yamamoto | Men's cross-country | 1:35:26 | 27 |
| Rie Katayama | Women's cross-country | 1:38:26 | 20 |

## Diving

Japan has qualified in the following events.

### Women

| Athlete | Event | Preliminaries | Preliminaries | Semifinals | Semifinals | Final | Final |
| Athlete | Event | Points | Rank | Points | Rank | Points | Rank |
| Mai Nakagawa | 10 m platform | 327.65 | 8 Q | 260.05 | 18 | Did not advance | Did not advance |

## Equestrian

Currently, Japan has qualified eight athletes for the Games.

### Dressage

| Athlete | Horse | Event | Grand Prix | Grand Prix | Grand Prix Special | Grand Prix Special | Grand Prix Freestyle | Grand Prix Freestyle | Overall | Overall |
| Athlete | Horse | Event | Score | Rank | Score | Rank | Technical | Artistic | Score | Rank |
| Hiroshi Hoketsu | Whisper | Individual | 68.739 | 40 | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance |

### Eventing

| Athlete | Horse | Event | Dressage | Dressage | Cross-country | Cross-country | Cross-country | Jumping | Jumping | Jumping | Jumping | Jumping | Jumping | Total | Total |
| Athlete | Horse | Event | Dressage | Dressage | Cross-country | Cross-country | Cross-country | Qualifier | Qualifier | Qualifier | Final | Final | Final | | | Total | Total |
| Athlete | Horse | Event | Penalties | Rank | Penalties | Total | Rank | Penalties | Total | Rank | Penalties | Total | Rank | Penalties | Rank |
| Atsushi Negishi | Pretty Darling | Individual | 50.40 | 33 | 25.60 | 76.00 | 40 | 12.00 | 88.00 | 39 | Did not advance | Did not advance | Did not advance | 88.00 | 39 |
| Yoshiaki Oiwa | Noonday de Conde | Individual | 38.10 | 1 | Eliminated | Eliminated | Eliminated | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance |
| Kenki Sato | Chippieh | Individual | 42.20 | 15 | Eliminated | Eliminated | Eliminated | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance |
| Toshiyuki Tanaka | Marquis De Plescop | Individual | 55.00 | 52 | 60.00 | 115.00 | 55 | 4.00 | 119.00 | 48 | Did not advance | Did not advance | Did not advance | 119.00 | 48 |
| Takayuki Yumira | Latina | Individual | 58.50 | =58 | Eliminated | Eliminated | Eliminated | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance |
| Atsushi Negishi Yoshiaki Oiwa Kenki Sato Toshiyuki Tanaka Takayuki Yumira | See above | Team | 130.70 | 6 | 1060.30 | 1191.00 | 13 | 16.00 | 1207.00 | 12 | — | — | — | 1207.00 | 12 |

### Show jumping

| Athlete | Horse | Event | Qualification | Qualification | Qualification | Qualification | Qualification | Qualification | Qualification | Qualification | Final | Final | Final | Final | Final | Total | Total |
| Athlete | Horse | Event | Round 1 | Round 1 | Round 2 | Round 2 | Round 2 | Round 3 | Round 3 | Round 3 | Round A | Round A | Round B | Round B | Round B | | | Total | Total |
| Athlete | Horse | Event | Penalties | Rank | Penalties | Total | Rank | Penalties | Total | Rank | Penalties | Rank | Penalties | Total | Rank | Penalties | Rank |
| Taizo Sugitani | Avenzio | Individual | 0 | =1 Q | 4 | 4 | =17 Q | 8 | 12 | =26 Q | 14 | 33 | Did not advance | Did not advance | Did not advance | 14 | 33 |
| Reiko Takeda | Ari | Individual | 22 | 71 | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance | 22 | 71 |

## Fencing

Japan has qualified 8 fencers.

### Men

| Athlete | Event | Round of 64 | Round of 32 | Round of 16 | Quarterfinal | Semifinal | Final / BM | Final / BM |
| Athlete | Event | Opposition Score | Opposition Score | Opposition Score | Opposition Score | Opposition Score | Opposition Score | Rank |
| Kenta Chida | Individual foil | Bye | Sintes (FRA) L 11–15 | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance |
| Ryo Miyake | Individual foil | Bye | Baldini (ITA) L 6–15 | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance |
| Yuki Ota | Individual foil | Bye | Kleibrink (GER) W 15–5 | Cassarà (ITA) L 14–15 | Did not advance | Did not advance | Did not advance | Did not advance |
| Suguru Awaji Kenta Chida Ryo Miyake Yuki Ota | Team foil | — | — | — | China (CHN) W 45–30 | Germany (GER) W 41–40 | Italy (ITA) L 39–45 | |

### Women

| Athlete | Event | Round of 64 | Round of 32 | Round of 16 | Quarterfinal | Semifinal | Final / BM | Final / BM |
| Athlete | Event | Opposition Score | Opposition Score | Opposition Score | Opposition Score | Opposition Score | Opposition Score | Rank |
| Nozomi Nakano | Individual épée | Bye | Fiamingo (ITA) L 11–15 | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance |
| Kanae Ikehata | Individual foil | Bye | Gruchała (POL) W 9–8 | Thibus (FRA) W 15–11 | Nam H-H (KOR) L 6–15 | Did not advance | Did not advance | Did not advance |
| Shiho Nishioka | Individual foil | Heung (HKG) W 13–10 | Vezzali (ITA) L 8–14 | Did not advance | Did not advance | Did not advance | Did not advance | Did not advance |
| Chieko Sugawara | Individual foil | Bye | Jeon H-S (KOR) W 15–13 | Maîtrejean (FRA) W 15–9 | Di Francisca (ITA) L 9–15 | Did not advance | Did not advance | Did not advance |
| Kanae Ikehata Kyomi Hirata Shiho Nishioka Chieko Sugawara | Team foil | — | — | — | Russia (RUS) L 17–45 | Classification semi-final United States (USA) L 22–44 | 7th place final Great Britain (GBR) W 30–21 | 7 |
| Seira Nakayama | Individual sabre | — | Perrus (FRA) W 15–12 | Zagunis (USA) L 9–15 | Did not advance | Did not advance | Did not advance | Did not advance |

## Field hockey

Japan has qualified 1 team.
* Women's event – 1 team of 16 players.

### Women's tournament

The following is the Japan roster in the women's field hockey tournament of the 2012 Summer Olympics.
Head Coach: Zenjiro Yasuda
* Sakiyo Asano (GK)
* Nagisa Hayashi
* Akemi Kato
* Sachimi Iwao
* Miyuki Nakagawa
* Ai Murakami
* Shiho Otsuka
* Yukari Yamamoto (C)
* Aki Mitsuhashi
* Rika Komazawa
* Kaori Fujio
* Akane Shibata
* Chie Akutsu
* Keiko Manabe
* Masako Sato
* Izuki Tanaka
Reserves:
* Mika Imura
* Ryoko Oie (GK)

#### Group play

| Pos | Teamvte | Pld | W | D | L | GF | GA | GD | Pts | Qualification |
| 1 | Netherlands | 5 | 5 | 0 | 0 | 12 | 5 | +7 | 15 | Semi-finals |
| 2 | Great Britain (H) | 5 | 3 | 0 | 2 | 14 | 7 | +7 | 9 | Semi-finals |
| 3 | China | 5 | 2 | 1 | 2 | 6 | 3 | +3 | 7 | |
| 4 | South Korea | 5 | 2 | 0 | 3 | 9 | 13 | −4 | 6 | |
| 5 | Japan | 5 | 1 | 1 | 3 | 4 | 9 | −5 | 4 | |
| 6 | Belgium | 5 | 0 | 2 | 3 | 2 | 10 | −8 | 2 | |
* 29 July 2012 19:00
| Great Britain | 4–0 | Japan |
| Danson 7', 28' Thomas 23' Walton 26' | Report | |
* Umpires: Kelly Hudson (NZL) Soledad Iparraguirre (ARG)
* 31 July 2012 08:30
| Netherlands | 3–2 | Japan |
| Lammers 4', 43' Hoog 30' | Report | Komazawa 46' Mitsuhashi 53' |
* Umpires: Kang Hyun-young (KOR) Irene Presenqui (ARG)
* 2 August 2012 08:30
| South Korea | 1–0 | Japan |
| Cheon Seul-ki 42' | Report | |
* Umpires: Miao Lin (CHN) Frances Block (GBR)
* 4 August 2012 13:45
| Japan | 1–1 | Belgium |
| Yamamoto 58' | Report | Boon 34' |
* Umpires: Stella Bartlema (NED) Wendy Stewart (CAN)
* 6 August 2012 13:45
| Japan | 1–0 | China |
| Komazawa 54' | Report | |
* Umpires: Elena Eskina (RUS) Kelly Hudson (NZL)

#### 9th/10th place

* 8 August 2012 08:30
| Japan | 2–1 (a.e.t.) | South Africa |
| Murakami 63', 80' | Report | Deetlefs 27' |
* Umpires: Stella Bartlema (NED) Amy Hassick (USA)

## Football

Japan is qualified for the men's and women's event
* Men's team event – 1 team of 18 players
* Women's team event – 1 team of 18 players

### Men's tournament
#### Squad

The following is the Japan roster in the men's football tournament of the 2012 Summer Olympics.
Coach: Takashi Sekizuka
| No. | Pos. | Player | Date of birth (age) | 2012 club |
| 1 | 1GK | Shuichi Gonda | (1989-03-03)3 March 1989 (aged 23) | FC Tokyo |
| 2 | 2DF | Yuhei Tokunaga* | (1983-09-25)25 September 1983 (aged 28) | FC Tokyo |
| 3 | 3MF | Takahiro Ogihara | (1991-10-05)5 October 1991 (aged 20) | Cerezo Osaka |
| 4 | 2DF | Hiroki Sakai | (1990-04-12)12 April 1990 (aged 22) | Hannover 96 |
| 5 | 2DF | Maya Yoshida* (c) | (1988-08-24)24 August 1988 (aged 23) | VVV-Venlo |
| 6 | 2DF | Taisuke Muramatsu | (1989-12-16)16 December 1989 (aged 22) | Shimizu S-Pulse |
| 7 | 4FW | Yuki Otsu | (1990-03-24)24 March 1990 (aged 22) | Borussia Mönchengladbach |
| 8 | 2DF | Kazuya Yamamura | (1989-12-02)2 December 1989 (aged 22) | Kashima Antlers |
| 9 | 4FW | Kenyu Sugimoto | (1992-11-18)18 November 1992 (aged 19) | Tokyo Verdy |
| 10 | 3MF | Keigo Higashi | (1990-07-20)20 July 1990 (aged 22) | Omiya Ardija |
| 11 | 4FW | Kensuke Nagai | (1989-03-05)5 March 1989 (aged 23) | Nagoya Grampus |
| 12 | 2DF | Gotoku Sakai | (1991-03-14)14 March 1991 (aged 21) | Stuttgart |
| 13 | 2DF | Daisuke Suzuki | (1990-01-29)29 January 1990 (aged 22) | Albirex Niigata |
| 14 | 3MF | Takashi Usami | (1992-05-06)6 May 1992 (aged 20) | Hoffenheim |
| 15 | 4FW | Manabu Saito | (1990-04-04)4 April 1990 (aged 22) | Yokohama F. Marinos |
| 16 | 3MF | Hotaru Yamaguchi | (1990-10-06)6 October 1990 (aged 21) | Cerezo Osaka |
| 17 | 3MF | Hiroshi Kiyotake | (1989-11-12)12 November 1989 (aged 22) | Nürnberg |
| 18 | 1GK | Shunsuke Ando | (1990-08-10)10 August 1990 (aged 21) | Kawasaki Frontale |
* Over-aged player.

#### Group play

| Pos | Teamvte | Pld | W | D | L | GF | GA | GD | Pts | Qualification |
| 1 | Japan | 3 | 2 | 1 | 0 | 2 | 0 | +2 | 7 | Advance to knockout stage |
| 2 | Honduras | 3 | 1 | 2 | 0 | 3 | 2 | +1 | 5 | Advance to knockout stage |
| 3 | Morocco | 3 | 0 | 2 | 1 | 2 | 3 | −1 | 2 | |
| 4 | Spain | 3 | 0 | 1 | 2 | 0 | 2 | −2 | 1 | |

#### Final rank

    4th place.

### Women's tournament
#### Squad

Head coach: Norio Sasaki
Japan named a squad of 18 players and 4 alternates for the tournament.
| No. | Pos. | Player | Date of birth (age) | Caps | Goals | Club |
| 1 | 1GK | Miho Fukumoto | (1983-10-02)2 October 1983 (aged 28) | 60 | 0 | Okayama Yunogo Belle |
| 2 | 2DF | Yukari Kinga | (1984-05-02)2 May 1984 (aged 28) | 79 | 5 | INAC Leonessa |
| 3 | 2DF | Azusa Iwashimizu | (1986-10-14)14 October 1986 (aged 25) | 77 | 8 | NTV Beleza |
| 4 | 2DF | Saki Kumagai | (1990-10-17)17 October 1990 (aged 21) | 41 | 0 | 1. FFC Frankfurt |
| 5 | 2DF | Aya Sameshima | (1987-06-16)16 June 1987 (aged 25) | 45 | 2 | Vegalta Sendai |
| 6 | 3MF | Mizuho Sakaguchi | (1987-10-15)15 October 1987 (aged 24) | 53 | 16 | NTV Beleza |
| 7 | 4FW | Kozue Ando | (1982-07-09)9 July 1982 (aged 30) | 103 | 17 | FCR 2001 Duisburg |
| 8 | 3MF | Aya Miyama (captain) | (1985-01-28)28 January 1985 (aged 27) | 112 | 27 | Okayama Yunogo Belle |
| 9 | 3MF | Nahomi Kawasumi | (1985-09-23)23 September 1985 (aged 26) | 31 | 8 | INAC Leonessa |
| 10 | 3MF | Homare Sawa | (1978-09-06)6 September 1978 (aged 33) | 179 | 80 | INAC Leonessa |
| 11 | 4FW | Shinobu Ohno | (1984-01-23)23 January 1984 (aged 28) | 105 | 37 | INAC Leonessa |
| 12 | 2DF | Kyoko Yano | (1984-06-03)3 June 1984 (aged 28) | 72 | 1 | Urawa Red Diamonds |
| 13 | 4FW | Karina Maruyama | (1983-03-26)26 March 1983 (aged 29) | 70 | 14 | Speranza F.C. Osaka-Takatsuki |
| 14 | 3MF | Asuna Tanaka | (1988-04-23)23 April 1988 (aged 24) | 13 | 3 | INAC Leonessa |
| 15 | 4FW | Megumi Takase | (1990-11-10)10 November 1990 (aged 21) | 26 | 5 | INAC Leonessa |
| 16 | 4FW | Mana Iwabuchi | (1993-03-18)18 March 1993 (aged 19) | 11 | 2 | NTV Beleza |
| 17 | 4FW | Yūki Ōgimi | (1987-07-15)15 July 1987 (aged 25) | 83 | 36 | 1. FFC Turbine Potsdam |
| 18 | 1GK | Ayumi Kaihori | (1986-09-04)4 September 1986 (aged 25) | 31 | 0 | INAC Leonessa |

#### Group play

| Pos | Teamvte | Pld | W | D | L | GF | GA | GD | Pts | Qualification |
| 1 | Sweden | 3 | 1 | 2 | 0 | 6 | 3 | +3 | 5 | Qualified for the quarter-finals |
| 2 | Japan | 3 | 1 | 2 | 0 | 2 | 1 | +1 | 5 | Qualified for the quarter-finals |
| 3 | Canada | 3 | 1 | 1 | 1 | 6 | 4 | +2 | 4 | Qualified for the quarter-finals |
| 4 | South Africa | 3 | 0 | 1 | 2 | 1 | 7 | −6 | 1 | |

#### Gold medal game
## Gymnastics
### Artistic
#### Team

| Athlete | Event | Qualification | Qualification | Qualification | Qualification | Qualification | Qualification | Qualification | Qualification | Final | Final | Final | Final | Final | Final | Final | Final |
| Athlete | Event | Apparatus | Apparatus | Apparatus | Apparatus | Apparatus | Apparatus | Total | Rank | Apparatus | Apparatus | Apparatus | Apparatus | Apparatus | Apparatus | Total | Rank |
| Athlete | Event | F | PH | R | V | PB | HB | Total | Rank | F | PH | R | V | PB | HB | Total | Rank |
| Ryohei Kato | Team | 15.433 | 14.333 | — | 15.900 | — | — | — | — | 15.300 | 14.766 | — | 16.041 | — | — | — | — |
| Kazuhito Tanaka | Team | 13.666 | 12.200 | 15.100 | 15.750 | 15.725 Q | 14.400 | 86.841 | 22 * | 13.733 | 13.433 | — | — | 15.366 | 15.166 | — | — |
| Yusuke Tanaka | Team | — | — | 15.033 | — | 15.866 Q | 14.200 | — | — | — | — | 15.200 | — | 15.500 | 16.000 | — | — |
| Kōhei Uchimura | Team | 15.766 Q | 12.466 | 14.966 | 16.033 | 15.533 | 15.000 | 89.764 | 9 Q | 15.700 | 14.166 | 15.133 | 15.900 | 15.416 | 15.733 | — | — |
| Koji Yamamuro | Team | 14.433 | 14.400 | 14.900 | 15.333 | 14.200 | 14.366 | 87.632 | 18 Q | — | — | 15.366 | 14.033 | — | — | — | — |
| Total | Team | 45.632 | 41.199 | 45.099 | 47.683 | 47.124 | 43.766 | 270.503 | 5 Q | 44.733 | 42.365 | 45.699 | 45.971 | 46.282 | 46.899 | 271.952 | |
* On 30 July, Koji Yamamuro was injured on vault during the men's team final. It was announced that he would not compete in the individual all-around final as a result, and that his teammate, Kazuhito Tanaka would be able to compete instead.

#### Individual finals

| Athlete | Event | Apparatus | Apparatus | Apparatus | Apparatus | Apparatus | Apparatus | Total | Rank |
| Athlete | Event | F | PH | R | V | PB | HB | Total | Rank |
| Kazuhito Tanaka | All-around | 14.166 | 13.433 | 15.200 | 15.533 | 15.500 | 15.575 | 89.407 | 6 |
| Kazuhito Tanaka | Parallel bars | — | — | — | — | 15.500 | — | 15.500 | 4 |
| Yusuke Tanaka | Parallel bars | — | — | — | — | 15.100 | — | 15.100 | 8 |
| Kōhei Uchimura | All-around | 15.100 | 15.066 | 15.333 | 16.266 | 15.325 | 15.600 | 92.690 | |
| Kōhei Uchimura | Floor | 15.800 | — | — | — | — | — | 15.800 | |
| Koji Yamamuro | All-around | Withdrew due to injury | Withdrew due to injury | Withdrew due to injury | Withdrew due to injury | Withdrew due to injury | Withdrew due to injury | Withdrew due to injury | Withdrew due to injury |

#### Team

| Athlete | Event | Qualification | Qualification | Qualification | Qualification | Qualification | Qualification | Final | Final | Final | Final | Final | Final |
| Athlete | Event | Apparatus | Apparatus | Apparatus | Apparatus | Total | Rank | Apparatus | Apparatus | Apparatus | Apparatus | Total | Rank |
| Athlete | Event | F | V | UB | BB | Total | Rank | F | V | UB | BB | Total | Rank |
| Yu Minobe | Team | 12.966 | — | 13.066 | 14.133 | — | — | 13.100 | — | — | — | — | — |
| Yuko Shintake | Team | 13.633 | 13.633 | — | 14.166 | — | — | 13.266 | — | — | 13.433 | — | — |
| Rie Tanaka | Team | 13.300 | 13.000 | 14.633 | 13.400 | 54.333 | 27 Q | — | 14.416 | 14.333 | 12.833 | — | — |
| Asuka Teramoto | Team | 14.233 | 14.600 | 14.566 | 14.466 | 57.865 | 8 Q | 14.233 | 14.700 | 14.200 | 13.900 | — | — |
| Koko Tsurumi | Team | — | 13.800 | 15.033Q | — | — | — | — | 13.766 | 14.466 | — | — | — |
| Total | Team | 41.166 | 42.033 | 44.232 | 42.765 | 170.196 | 6 Q | 40.599 | 42.882 | 42.999 | 40.166 | 166.646 | 8 |

#### Individual finals

| Athlete | Event | Apparatus | Apparatus | Apparatus | Apparatus | Total | Rank |
| Athlete | Event | F | V | UB | BB | Total | Rank |
| Rie Tanaka | All-around | 14.166 | 14.500 | 13.700 | 13.266 | 55.632 | 16 |
| Asuka Teramoto | All-around | 14.766 | 14.300 | 14.300 | 13.966 | 57.332 | 11 |
| Koko Tsurumi | Uneven bars | — | — | 14.966 | — | 14.966 | 7 |

### Rhythmic

| Athlete | Event | Qualification | Qualification | Qualification | Qualification | Final | Final | Final | Final |
| Athlete | Event | 5 balls | 3 ribbons 2 hoops | Total | Rank | 5 balls | 3 ribbons 2 hoops | Total | Rank |
| Natsuki Fukase Airi Hatakeyama Rie Matsubara Rina Miura Nina Saeed-Yokota Kotono Tanaka | Team | 26.725 | 26.300 | 53.025 | 8 Q | 27.000 | 27.100 | 54.100 | 7 |

### Trampoline

| Athlete | Event | Qualification | Qualification | Final | Final |
| Athlete | Event | Score | Rank | Score | Rank |
| Masaki Ito | Men's | 109.810 | 4 Q | 60.895 | 4 |
| Yasuhiro Ueyama | Men's | 109.809 | 5 Q | 60.240 | 5 |
| Ayano Kishi | Women's | 97.985 | 14 | did not advance | did not advance |

## Judo
### Men

| Athlete | Event | Round of 64 | Round of 32 | Round of 16 | Quarterfinals | Semifinals | Repechage | Final / BM | Final / BM |
| Athlete | Event | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Rank |
| Hiroaki Hiraoka | −60 kg | Bye | McKenzie (GBR) W 0111–0000 | Arshanski (ISR) W 0012–0000 | Milous (FRA) W 0012–0010 | Verde (ITA) W 0110–0001 | Bye | Galstyan (RUS) L 0000–1000 | |
| Masashi Ebinuma | −66 kg | Bye | Mehmedovic (CAN) W 0111–0000 | Lim (KAZ) W 0010–0001 | Cho J-H (KOR) W 0001–0001 | Shavdatuashvili (GEO) L 0000–0100 | Bye | Zagrodnik (POL) W 0110–0101 | |
| Riki Nakaya | −73 kg | Bye | Maxwell (BAR) W 0100–0001 | Palelashvili (ISR) W 0101–0000 | Boqiev (TJK) W 0011–0002 | Elmont (NED) W 0000–0001 | Bye | Isaev (RUS) L 0001–0011 | |
| Takahiro Nakai | −81 kg | Bye | Munyonga (ZAM) W 1000–0000 | Toma (MDA) W 0101–0003 | Bischof (GER) L 0000–1010 | Did not advance | Guilheiro (BRA) W 0011–0002 | Nifontov (RUS) L 0000–0201 | 5 |
| Masashi Nishiyama | −90 kg | — | Mamedov (KGZ) W 0110–0001 | Bolat (KAZ) W 0010–0000 | Song D-N (KOR) L 0101–0011 | Did not advance | Choriev (UZB) W 0012–0012 YUS | Denisov (RUS) W 0000–0000 YUS | |
| Takamasa Anai | −100 kg | — | Austin (GBR) W 0101–0003 | Krpálek (CZE) L 0000–1001 | did not advance | did not advance | did not advance | did not advance | did not advance |
| Daiki Kamikawa | +100 kg | — | Castillo (GUA) W 0100–0000 | Makarau (BLR) L 0001–0011 | did not advance | did not advance | did not advance | did not advance | did not advance |

### Women

| Athlete | Event | Round of 32 | Round of 16 | Quarterfinals | Semifinals | Repechage | Final / BM | Final / BM |
| Athlete | Event | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Rank |
| Tomoko Fukumi | −48 kg | Blanco (ESP) W 0100–0001 | Edwards (GBR) W 0020–0000 | Pareto (ARG) W 0010–0002 | Dumitru (ROM) L 0011–0102 | Bye | Csernoviczki (HUN) L 0001–1001 | 5 |
| Misato Nakamura | −52 kg | Bye | An K-a (PRK) L 0002–0102 | did not advance | did not advance | did not advance | did not advance | did not advance |
| Kaori Matsumoto | −57 kg | Đukić (SLO) W 0011–0002 | Gasimova (AZE) W 0010–0000 | Quintavalle (ITA) W 0010–0001 | Pavia (FRA) W 0010–0000 | Bye | Căprioriu (ROM) W 0100–0000 | |
| Yoshie Ueno | −63 kg | Chaudhary (IND) W 1000–0000 | Mišković (CRO) W 0010–0000 | Joung D-w (KOR) L 0010–0000 | Did not advance | Willeboordse (NED) W 0010–0000 | Tsedevsuren (MGL) W 0010–0002 | |
| Haruka Tachimoto | −70 kg | Bye | Cortés (CUB) W 0000–0001 | Chen F (CHN) L 0020–0020 YUS | Did not advance | Bosch (NED) L 0002–0011 | Did not advance | 7 |
| Akari Ogata | −78 kg | Jeong G-M (KOR) W 0001–0002 | Verkerk (NED) L 0002–0011 | did not advance | did not advance | did not advance | did not advance | did not advance |
| Mika Sugimoto | +78 kg | Bye | Blanco (VEN) W 0100–0000 | Altheman (BRA) W 0100–0000 | Bryant (GBR) W 0011–0002 | Bye | Ortiz (CUB) L 0001–0000 | |

## Modern pentathlon

Based on their results at the 2011 Asian/Oceania Championships three Japanese pentathletes have qualified for London; Shinichi Tomii has earned places in the men's event; Shino Yamanaka and Narumi Kurosu have earned places in the women's event.
| Athlete | Event | Fencing (épée one touch) | Fencing (épée one touch) | Fencing (épée one touch) | Swimming (200 m freestyle) | Swimming (200 m freestyle) | Swimming (200 m freestyle) | Riding (show jumping) | Riding (show jumping) | Riding (show jumping) | Combined: shooting/running (10 m air pistol)/(3000 m) | Combined: shooting/running (10 m air pistol)/(3000 m) | Combined: shooting/running (10 m air pistol)/(3000 m) | Total points | Final rank |
| Athlete | Event | Results | Rank | MP points | Time | Rank | MP points | Penalties | Rank | MP points | Time | Rank | MP Points | Total points | Final rank |
| Shinichi Tomii | Men's | 18–17 | =11 | 832 | 2:01.19 | 6 | 1348 | 112 | 25 | 1088 | 11:19.03 | 29 | 2284 | 5552 | 22 |
| Narumi Kurosu | Women's | 8–27 | 35 | 592 | 2:22.39 | 28 | 1092 | 496 | 33 | 704 | 13:52.94 | 35 | 1672 | 4060 | 34 |
| Shino Yamanaka | Women's | 7–28 | 36 | 568 | 2:30.36 | 35 | 996 | 64 | 15 | 1136 | 11:58.56 | 8 | 2128 | 4828 | 30 |

## Rowing

Japan has qualified the following boats.

### Men

| Athlete | Event | Heats | Heats | Repechage | Repechage | Semifinals | Semifinals | Final | Final |
| Athlete | Event | Time | Rank | Time | Rank | Time | Rank | Time | Rank |
| Daisaku Takeda Kazushige Ura | Lightweight double sculls | 6:54.01 | 5 R | 6:39.81 | 2 SA/B | 6:48.61 | 6 FB | 6:48.27 | 12 |

### Women

| Athlete | Event | Heats | Heats | Repechage | Repechage | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Final | Final |
| Athlete | Event | Time | Rank | Time | Rank | Time | Rank | Time | Rank | Time | Rank |
| Haruna Sakakibara | Single sculls | 7:52.98 | 5 QF | Bye | Bye | 8:12.26 | 5 SC/D | 8:05.65 | 5 FD | 8:42.90 | 23 |
| Atsumi Fukumoto Akiko Iwamoto | Lightweight double sculls | 7:30.29 | 3 R | 7:23.79 | 2 SA/B | — | — | 7:34.23 | 6 FB | 7:32.12 | 12 |
Qualification Legend: FA=Final A (medal); FB=Final B (non-medal); FC=Final C (non-medal); FD=Final D (non-medal); FE=Final E (non-medal); FF=Final F (non-medal); SA/B=Semifinals A/B; SC/D=Semifinals C/D; SE/F=Semifinals E/F; QF=Quarterfinals; R=Repechage

## Sailing

Japan has qualified 1 boat for each of the following events

### Men

| Athlete | Event | Race | Race | Race | Race | Race | Race | Race | Race | Race | Race | Race | Net points | Final rank |
| Athlete | Event | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | M* | Net points | Final rank |
| Makoto Tomizawa | RS:X | 25 | 25 | 25 | 29 | 24 | 26 | 34 | 30 | 21 | 4 | EL | 209 | 28 |
| Ryunosuke Harada Yugo Yoshida | 470 | 19 | 12 | 25 | 12 | 7 | 11 | 21 | 17 | 17 | 15 | EL | 131 | 18 |

### Women

| Athlete | Event | Race | Race | Race | Race | Race | Race | Race | Race | Race | Race | Race | Net points | Final rank |
| Athlete | Event | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | M* | Net points | Final rank |
| Yuki Sunaga | RS:X | 19 | 23 | 22 | 22 | 22 | 24 | 22 | 20 | 18 | 12 | EL | 180 | 21 |
| Manami Doi | Laser Radial | 29 | 32 | 31 | 27 | 26 | 36 | 30 | 22 | 27 | 29 | EL | 253 | 31 |
| Ai Kondo Wakako Tabata | 470 | 9 | 4 | 17 | 20 | 11 | 9 | 13 | DSQ | 13 | 8 | EL | 103 | 14 |

### Open

| Athlete | Event | Race | Race | Race | Race | Race | Race | Race | Race | Race | Race | Race | Race | Race | Race | Race | Race | Net points | Final rank |
| Athlete | Event | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | M* | Net points | Final rank |
| Yukio Makino Kenji Takahashi | 49er | 16 | 13 | 17 | 14 | 18 | 11 | 18 | 16 | 18 | 18 | 14 | 15 | 6 | 2 | 10 | EL | 188 | 18 |
M = Medal race; EL = Eliminated – did not advance into the medal race;

## Shooting

Japan has gained four quota places in the shooting events;

### Men

| Athlete | Event | Qualification | Qualification | Final | Final |
| Athlete | Event | Points | Rank | Points | Rank |
| Tomoyuki Matsuda | 50 m pistol | 559 | 11 | did not advance | did not advance |
| Tomoyuki Matsuda | 10 m air pistol | 581 | 13 | did not advance | did not advance |
| Midori Yajima | 50 m rifle 3 positions | 1148 | 39 | did not advance | did not advance |
| Midori Yajima | 50 m rifle prone | 590 | 33 | did not advance | did not advance |
| Midori Yajima | 10 m air rifle | 589 | 38 | did not advance | did not advance |

### Women

| Athlete | Event | Qualification | Qualification | Final | Final |
| Athlete | Event | Points | Rank | Points | Rank |
| Yukari Konishi | 25 m pistol | 574 | 31 | did not advance | did not advance |
| Yukari Konishi | 10 m air pistol | 377 | 31 | did not advance | did not advance |
| Yukie Nakayama | Trap | 65 | 15 | did not advance | did not advance |

## Swimming

Japan sent a total of 29 swimmers at the London games, after having achieved qualifying standards in their respective events (up to a maximum of 2 swimmers in each event at the Olympic Qualifying Time (OQT), and 1 at the Olympic Selection Time (OST)): Excluding the relay events, eight swimmers competed in more than a single event, including the defending champion Kosuke Kitajima from the breaststroke events.
By results, Japan left London with 11 swimming medals (3 silver and 8 bronze), the largest amount received at a single event. Backstroke swimmer Ryosuke Irie, and breaststroke swimmer Satomi Suzuki managed to win three medals in all of their respective events, whether individual or relay. Kosuke Hagino, the youngest male swimmer in the team, surprisingly won the bronze medal in the men's 400 m individual medley, surpassing all-time defending champion Michael Phelps, who finished behind him in the finals. Butterfly swimmer Takeshi Matsuda managed to repeat his bronze medal from Beijing in the men's 200 m butterfly, in addition to his silver from the men's medley relay event. Kitajima, who bid to win double breaststroke swimming events for third Games in succession, missed out of medal standings in the final rounds.

### Men

| Athlete | Event | Heat | Heat | Semifinal | Semifinal | Final | Final |
| Athlete | Event | Time | Rank | Time | Rank | Time | Rank |
| Takuro Fujii | 100 m butterfly | 52.49 | 20 | did not advance | did not advance | did not advance | did not advance |
| Kosuke Hagino | 200 m individual medley | 1:58.22 | 3 Q | 1:57.95 | 5 Q | 1:57.35 | 5 |
| Kosuke Hagino | 400 m individual medley | 4:10.01 | 1 Q | — | — | 4:08.94 NR | |
| Yasunari Hirai | 10 km open water | — | — | — | — | 1:51:20.1 | 15 |
| Yuya Horihata | 400 m individual medley | 4:13.09 | 7 Q | — | — | 4:13.30 | 6 |
| Ryosuke Irie | 100 m backstroke | 53.56 | 5 Q | 53.29 | 4 Q | 52.97 | |
| Ryosuke Irie | 200 m backstroke | 1:56.81 | 4 Q | 1:55.68 | 4 Q | 1:53.78 | |
| Kazuya Kaneda | 200 m butterfly | 1:55.70 | 7 Q | 1:55.56 | 10 | did not advance | did not advance |
| Kosuke Kitajima | 100 m breaststroke | 59.63 | 2 Q | 59.69 | 6 Q | 59.79 | 5 |
| Kosuke Kitajima | 200 m breaststroke | 2:09.43 | 5 Q | 2:09.03 | 5 Q | 2:08.35 | 4 |
| Takeshi Matsuda | 100 m butterfly | 52.36 | =16 LSO | did not advance | did not advance | did not advance | did not advance |
| Takeshi Matsuda | 200 m butterfly | 1:55.81 | 8 Q | 1:54.25 | 1 Q | 1:53.21 | |
| Ken Takakuwa | 200 m individual medley | 1:58.82 | 9 Q | 1:58.31 | 6 Q | 1:58.53 | 6 |
| Ryo Tateishi | 100 m breaststroke | 59.86 | 8 Q | 59.93 | 10 | did not advance | did not advance |
| Ryo Tateishi | 200 m breaststroke | 2:09.37 | 4 Q | 2:09.13 | 7 Q | 2:08.29 | |
| Kazuki Watanabe | 200 m backstroke | 1:58.17 | 13 Q | 1:56.81 | 6 Q | 1:57.03 | 6 |
| Kosuke Hagino Chiaki Ishibashi Yuki Kobori Takeshi Matsuda Sho Sotodate | 4 × 200 m freestyle relay | 7:11.74 | 9 | — | — | did not advance | did not advance |
| Takuro Fujii Ryosuke Irie Kosuke Kitajima Takeshi Matsuda | 4 × 100 m medley relay | 3:33.64 | 3 Q | — | — | 3:31.26 | |

### Women

| Athlete | Event | Heat | Heat | Semifinal | Semifinal | Final | Final |
| Athlete | Event | Time | Rank | Time | Rank | Time | Rank |
| Natsumi Hoshi | 100 m butterfly | 59.06 | 23 | did not advance | did not advance | did not advance | did not advance |
| Natsumi Hoshi | 200 m butterfly | 2:08.04 | 6 Q | 2:06.37 | 3 Q | 2:05.48 | |
| Hanae Ito | 200 m freestyle | 1:58.93 | 15 Q | 1:59.24 | 16 | did not advance | did not advance |
| Izumi Kato | 200 m individual medley | 2:13.85 | 14 Q | 2:14.47 | 14 | did not advance | did not advance |
| Yuka Kato | 100 m butterfly | 58.72 | 15 Q | 58.26 | 11 | did not advance | did not advance |
| Yumi Kida | 10 km open water | — | — | — | — | 1:58:59.1 | 13 |
| Yayoi Matsumoto | 50 m freestyle | 25.73 | 35 | did not advance | did not advance | did not advance | did not advance |
| Mina Matsushima | 100 m breaststroke | 1:07.69 | 14 Q | 1:08.26 | 16 | did not advance | did not advance |
| Miyu Otsuka | 200 m backstroke | 2:11.65 | 21 | did not advance | did not advance | did not advance | did not advance |
| Miyu Otsuka | 400 m individual medley | 4:39.13 | 12 | — | — | did not advance | did not advance |
| Satomi Suzuki | 100 m breaststroke | 1:07.08 | 6 Q | 1:07.10 | 7 Q | 1:06.46 | |
| Satomi Suzuki | 200 m breaststroke | 2:23.22 | 3 Q | 2:22.40 | 3 Q | 2:20.70 | |
| Miho Takahashi | 400 m individual medley | 4:45.10 | 20 | — | — | did not advance | did not advance |
| Aya Takano | 400 m freestyle | 4:12.33 | 26 | — | — | did not advance | did not advance |
| Aya Terakawa | 100 m backstroke | 59.82 | 4 Q | 59.34 | 3 Q | 58.83 | |
| Haruka Ueda | 100 m freestyle | 54.35 | 12 Q | 54.59 | 16 | did not advance | did not advance |
| Kanako Watanabe | 200 m breaststroke | 2:26.38 | 12 Q | 2:27.32 | 14 | did not advance | did not advance |
| Hanae Ito Yayoi Matsumoto Miki Uchida Haruka Ueda | 4 × 100 m freestyle relay | 3:38.06 | 5 Q | — | — | 3:37.96 | 7 |
| Hanae Ito Yayoi Matsumoto Aya Takano Haruka Ueda | 4 × 200 m freestyle relay | 7:54.56 | 8 Q | — | — | 7:56.73 | 8 |
| Yuka Kato Satomi Suzuki Aya Terakawa Haruka Ueda | 4 × 100 m medley relay | 3:57.87 | 2 Q | — | — | 3:55.73 | |
WSO – Win swim-off; LSO – Lost swim-off

## Synchronized swimming

Japan has qualified 9 quota places in synchronized swimming.
| Athlete | Event | Technical routine | Technical routine | Free routine (preliminary) | Free routine (preliminary) | Free routine (preliminary) | Free routine (final) | Free routine (final) | Free routine (final) |
| Athlete | Event | Points | Rank | Points | Total (technical + free) | Rank | Points | Total (technical + free) | Rank |
| Yukiko Inui Chisa Kobayashi | Duet | 93.200 | 5 | 93.200 | 186.400 | 5 Q | 93.540 | 186.740 | 5 |
| Yumi Adachi Aika Hakoyama Yukiko Inui Mayo Itoyama Chisa Kobayashi Risako Mitsui Mai Nakamura Mariko Sakai Kurumi Yoshida | Team | 93.800 | 5 | — | — | — | 93.830 | 187.630 | 5 |

## Table tennis

Japan has qualified 3 men and 3 women.

### Men

| Athlete | Event | Preliminary round | Round 1 | Round 2 | Round 3 | Round 4 | Quarterfinals | Semifinals | Final / BM | Final / BM |
| Athlete | Event | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Rank |
| Seiya Kishikawa | Singles | Bye | Bye | Bye | Gionis (GRE) W (4–3) | Oh S-e (KOR) W (4–1) | Wang H (CHN) L (0–4) | did not advance | did not advance | did not advance |
| Jun Mizutani | Singles | Bye | Bye | Bye | Lashin (EGY) W (4–1) | Maze (DEN) L (0–4) | did not advance | did not advance | did not advance | did not advance |
| Seiya Kishikawa Jun Mizutani Koki Niwa | Team | — | — | — | — | Canada (CAN) W (3–0) | Hong Kong (HKG) L (2–3) | did not advance | did not advance | did not advance |

### Women

| Athlete | Event | Preliminary round | Round 1 | Round 2 | Round 3 | Round 4 | Quarterfinals | Semifinals | Final / BM | Final / BM |
| Athlete | Event | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Rank |
| Ai Fukuhara | Singles | Bye | Bye | Bye | Tikhomirova (RUS) W (4–0) | Li J (NED) W (4–3) | Ding N (CHN) L (0–4) | did not advance | did not advance | did not advance |
| Kasumi Ishikawa | Singles | Bye | Bye | Bye | Li Qb (AUT) W (4–2) | Li Q (POL) W (4–1) | Wang Yg (SIN) W (4–1) | Li Xx (CHN) L (1–4) | Feng Tw (SIN) L (0–4) | 4 |
| Ai Fukuhara Sayaka Hirano Kasumi Ishikawa | Team | — | — | — | — | United States (USA) W (3–0) | Germany (GER) W (3–0) | Singapore (SIN) W (3–0) | China (CHN) L (0–3) | |

## Taekwondo

Japan has qualified the following quotas.
| Athlete | Event | Round of 16 | Quarterfinals | Semifinals | Repechage | Bronze medal | Final | Final |
| Athlete | Event | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Rank |
| Erika Kasahara | Women's −49 kg | Tona (PNG) W 12–0 PTG | Wu Jy (CHN) L 0–14 PTG | Did not advance | Zamora (GUA) L 2–6 | did not advance | did not advance | did not advance |
| Mayu Hamada | Women's −57 kg | Zaninović (CRO) W 14–11 | Jones (GBR) L 3–13 | Did not advance | Gladović (SRB) W 15–2 PTG | Harnois (FRA) L 8–12 | Did not advance | 5 |

## Tennis

| Athlete | Event | Round of 64 | Round of 32 | Round of 16 | Quarterfinals | Semifinals | Final / BM | Final / BM |
| Athlete | Event | Opposition Score | Opposition Score | Opposition Score | Opposition Score | Opposition Score | Opposition Score | Rank |
| Tatsuma Ito | Men's singles | Raonic (CAN) L 3–6, 4–6 | did not advance | did not advance | did not advance | did not advance | did not advance | did not advance |
| Kei Nishikori | Men's singles | Tomic (AUS) W 7–6, 7–6 | Davydenko (RUS) W 4–6, 6–4, 6–1 | Ferrer (ESP) W 6–0, 3–6, 6–4 | del Potro (ARG) L 4–6, 6–7$^{(4–7)}$ | did not advance | did not advance | did not advance |
| Go Soeda | Men's singles | Baghdatis (CYP) L 7–6$^{(8–6)}$ 6–7$^{(5–7)}$ 2–6 | did not advance | did not advance | did not advance | did not advance | did not advance | did not advance |
| Kei Nishikori Go Soeda | Men's doubles | — | Federer / Wawrinka (SUI) L 7–6$^{(7–5)}$, 4–6, 4–6 | did not advance | did not advance | did not advance | did not advance | did not advance |

## Triathlon

Japan has qualified 2 men and 3 women.
| Athlete | Event | Swim (1.5 km) | Trans 1 | Bike (40 km) | Trans 2 | Run (10 km) | Total Time | Rank |
| Yuichi Hosoda | Men's | 18:06 | 0:43 | 59:37 | 0:31 | 32:43 | 1:51:40 | 43 |
| Hirokatsu Tayama | Men's | 17:24 | 0:44 | 58:45 | 0:34 | 31:57 | 1:49:24 | 20 |
| Mariko Adachi | Women's | 18:25 | 0:44 | 1:06:29 | 0:35 | 35:51 | 2:02:04 | 14 |
| Juri Ide | Women's | 19:46 | 0:43 | 1:06:56 | 0:35 | 36:43 | 2:04:43 | 34 |
| Ai Ueda | Women's | 20:48 | 0:45 | 1:09:42 | 0:31 | 34:48 | 2:06:34 | 39 |

## Volleyball
### Beach

The men's team qualified after winning the AVC Continental Beach Volleyball Cup.
| Athlete | Event | Preliminary round | Standing | Round of 16 | Quarterfinals | Semifinals | Final / BM | Final / BM |
| Athlete | Event | Opposition Score | Standing | Opposition Score | Opposition Score | Opposition Score | Opposition Score | Rank |
| Kentaro Asahi Katsuhiro Shiratori | Men's | Pool B Dalhausser – Rogers (USA) L 0 – 2 (15–21, 16–21) Beneš – Kubala (CZE) L 1 – 2 (21–17, 12–21, 7–15) Gavira – Herrera (ESP) L 0 – 2 (19–21, 20–22) | 4 | did not advance | did not advance | did not advance | did not advance | 19 |

### Indoor

Summary
| Team | Event | Group Stage | Group Stage | Group Stage | Group Stage | Group Stage | Group Stage | Quarterfinal | Semifinal | Final / BM | Final / BM |
| Team | Event | Opposition Score | Opposition Score | Opposition Score | Opposition Score | Opposition Score | Rank | Opposition Score | Opposition Score | Opposition Score | Rank |
| Japan women's | Women's tournament | Algeria W 0–3 | Italy L 3–1 | Dominican Republic W 0–3 | Russia L 1–3 | Great Britain W 0–3 | 3 Q | China W 3–2 | Brazil L 3–0 | South Korea W 3–0 | |

#### Women's tournament

Japan has qualified a team to the women's indoor tournament through the World Qualification Tournament.
* Women's team event – 1 team of 12 players

##### Team roster

The following is the Japanese roster in the women's volleyball tournament of the 2012 Summer Olympics.
Head coach: Masayoshi Manabe
| № | Name | Date of birth | Height | Weight | Spike | Block | 2012 club |
| 2 | Hitomi Nakamichi | 18 September 1985 | 1.59 m (5 ft 3 in) | 53 kg (117 lb) | 270 cm (110 in) | 256 cm (101 in) | Toray Arrows |
| 3 | Yoshie Takeshita | 18 March 1978 | 1.59 m (5 ft 3 in) | 53 kg (117 lb) | 280 cm (110 in) | 270 cm (110 in) | JT Marvelous |
| 4 | Mai Yamaguchi | 3 July 1983 | 1.76 m (5 ft 9 in) | 62 kg (137 lb) | 302 cm (119 in) | 290 cm (110 in) | Okayama Seagulls |
| 5 | Erika Araki (C) | 3 August 1984 | 1.86 m (6 ft 1 in) | 80 kg (180 lb) | 308 cm (121 in) | 298 cm (117 in) | Toray Arrows |
| 7 | Kaori Inoue | 21 October 1982 | 1.82 m (6 ft 0 in) | 59 kg (130 lb) | 306 cm (120 in) | 300 cm (120 in) | Denso Airybees |
| 8 | Maiko Kano | 15 July 1988 | 1.85 m (6 ft 1 in) | 72 kg (159 lb) | 303 cm (119 in) | 285 cm (112 in) | Beşiktaş |
| 10 | Yuko Sano | 26 July 1979 | 1.59 m (5 ft 3 in) | 63 kg (139 lb) | 260 cm (100 in) | 250 cm (98 in) | Igtisadchi Baku |
| 11 | Ai Ōtomo | 24 March 1982 | 1.84 m (6 ft 0 in) | 68 kg (150 lb) | 312 cm (123 in) | 305 cm (120 in) | JT Marvelous |
| 12 | Risa Shinnabe | 11 July 1990 | 1.73 m (5 ft 8 in) | 66 kg (146 lb) | 295 cm (116 in) | 268 cm (106 in) | Hisamitsu Springs |
| 14 | Saori Sakoda | 18 December 1987 | 1.75 m (5 ft 9 in) | 64 kg (141 lb) | 305 cm (120 in) | 279 cm (110 in) | Toray Arrows |
| 16 | Yukiko Ebata | 7 November 1989 | 1.76 m (5 ft 9 in) | 70 kg (150 lb) | 305 cm (120 in) | 293 cm (115 in) | Hitachi Rivale |
| 18 | Saori Kimura | 19 August 1986 | 1.85 m (6 ft 1 in) | 65 kg (143 lb) | 304 cm (120 in) | 293 cm (115 in) | VakıfBank Türk Telekom |

##### Group play

| Pos | Teamvte | Pld | W | L | Pts | SW | SL | SR | SPW | SPL | SPR | Qualification |
| 1 | Russia | 5 | 5 | 0 | 14 | 15 | 4 | 3.750 | 459 | 352 | 1.304 | Quarter-finals |
| 2 | Italy | 5 | 4 | 1 | 13 | 14 | 5 | 2.800 | 442 | 368 | 1.201 | Quarter-finals |
| 3 | Japan | 5 | 3 | 2 | 9 | 11 | 6 | 1.833 | 401 | 335 | 1.197 | Quarter-finals |
| 4 | Dominican Republic | 5 | 2 | 3 | 6 | 8 | 9 | 0.889 | 374 | 362 | 1.033 | Quarter-finals |
| 5 | Great Britain | 5 | 1 | 4 | 2 | 3 | 14 | 0.214 | 295 | 396 | 0.745 | |
| 6 | Algeria | 5 | 0 | 5 | 1 | 2 | 15 | 0.133 | 252 | 410 | 0.615 | |

##### Bronze medal match
## Weightlifting

Japan has qualified 1 man and 4 women.
| Athlete | Event | Snatch | Snatch | Clean & Jerk | Clean & Jerk | Total | Rank |
| Athlete | Event | Result | Rank | Result | Rank | Total | Rank |
| Kazuomi Ota | Men's +105 kg | 185 | 13 | 215 | 13 | 400 | 13 |
| Hiromi Miyake | Women's −48 kg | 87 | 2 | 110 | 3 | 197 | |
| Honami Mizuochi | Women's −48 kg | 80 | =6 | 96 | 8 | 176 | 6 |
| Kanae Yagi | Women's −53 kg | 82 | 13 | 109 | =8 | 191 | 13 |
| Mami Shimamoto | Women's +75 kg | 110 | 10 | 143 | 8 | 253 | 9 |

## Wrestling

Japan has qualified in the following quota places.
Key:
* VT – Victory by Fall.
* PP – Decision by Points – the loser with technical points.
* PO – Decision by Points – the loser without technical points.

### Men's freestyle

| Athlete | Event | Qualification | Round of 16 | Quarterfinal | Semifinal | Repechage 1 | Repechage 2 | Final / BM | Final / BM |
| Athlete | Event | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Rank |
| Shinichi Yumoto | −55 kg | Bye | Kim J-C (KOR) W 3–1 $^{PP}$ | Jaburyan (ARM) W 3–0 $^{PO}$ | Khinchegashvili (GEO) L 1–3 $^{PP}$ | Bye | Bye | Velikov (BUL) W 3–1 $^{PP}$ | |
| Kenichi Yumoto | −60 kg | Bye | Bonne (CUB) W 3–1 $^{PP}$ | Asgarov (AZE) L 1–3 $^{PP}$ | Did not advance | Bye | Schleicher (GER) W 3–1 $^{PP}$ | Scott (USA) L 1–3 $^{PP}$ | 5 |
| Tatsuhiro Yonemitsu | −66 kg | Bye | López (CUB) W 3–1 $^{PP}$ | Garcia (CAN) W 3–1 $^{PP}$ | Hasanov (AZE) W 3–0 $^{PO}$ | Bye | Bye | Kumar (IND) W 3–0 $^{PO}$ | |
| Sosuke Takatani | −74 kg | Aliyev (AZE) L 0–3 $^{PO}$ | did not advance | did not advance | did not advance | did not advance | did not advance | did not advance | 16 |
| Takao Isokawa | −96 kg | Tuamoheloa (ASA) W 5–0 $^{VB}$ | Musaev (KGZ) L 1–3 $^{PP}$ | did not advance | did not advance | did not advance | did not advance | did not advance | 8 |

### Men's Greco-Roman

| Athlete | Event | Qualification | Round of 16 | Quarterfinal | Semifinal | Repechage 1 | Repechage 2 | Final / BM | Final / BM |
| Athlete | Event | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Rank |
| Kohei Hasegawa | −55 kg | Bye | Tazhyieu (BLR) W 3–0 $^{PO}$ | Nyblom (DEN) L 0–3 $^{PO}$ | did not advance | did not advance | did not advance | did not advance | 10 |
| Ryutaro Matsumoto | −60 kg | Bye | Bilici (TUR) W 3–0 $^{PO}$ | Belmadani (FRA) W 3–0 $^{PO}$ | Norouzi (IRI) L 1–3 $^{PP}$ | Bye | Bye | Kebispayev (KAZ) W 5–0 $^{VT}$ | |
| Tsutomu Fujimura | −66 kg | Bye | Lester (USA) L 0–3 $^{PO}$ | did not advance | did not advance | did not advance | did not advance | did not advance | 13 |
| Norikatsu Saikawa | −96 kg | Bye | Lidberg (SWE) L 0–3 $^{PO}$ | did not advance | did not advance | did not advance | did not advance | did not advance | 17 |

### Women's freestyle

| Athlete | Event | Qualification | Round of 16 | Quarterfinal | Semifinal | Repechage 1 | Repechage 2 | Final / BM | Final / BM |
| Athlete | Event | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Rank |
| Hitomi Obara | −48 kg | Bye | Mezien (TUN) W 5–0 $^{VT}$ | Sambou (SEN) W 3–0 $^{PO}$ | Huynh (CAN) W 3–0 $^{PO}$ | Bye | Bye | Stadnik (AZE) W 3–1 $^{PP}$ | |
| Saori Yoshida | −55 kg | Bye | Campbell (USA) W 3–0 $^{PO}$ | Ratkevich (AZE) W 3–0 $^{PO}$ | Zholobova (RUS) W 3-0 $^{PO}$ | Bye | Bye | Verbeek (CAN) W 3-0 $^{PO}$ | |
| Kaori Icho | −63 kg | Bye | Dugrenier (CAN) W 3–0 $^{PO}$ | Johansson (SWE) W 3–0 $^{PO}$ | Battsetseg (MGL) W 3–0 $^{PO}$ | Bye | Bye | Jing Rx (CHN) W 3–0 $^{PO}$ | |
| Kyoko Hamaguchi | −72 kg | Bye | Manyurova (KAZ) L 1–3 $^{PP}$ | did not advance | did not advance | did not advance | did not advance | did not advance | 11 |