# Japan at the 2013 World Aquatics Championships

Japan competed at the 2013 World Aquatics Championships in Barcelona, Spain between 19 July and 4 August 2013.

## Medalists

| Medal | Name | Sport | Event | Date |
| Gold | Daiya Seto | Swimming | Men's 400 m individual medley | 4 August |
| Silver | Kosuke Hagino | Swimming | Men's 400 m freestyle | 28 July |
| Silver | Kosuke Hagino | Swimming | Men's 200 m individual medley | 1 August |
| Bronze | Aya Terakawa | Swimming | Women's 100 m backstroke | 30 July |
| Bronze | Aya Terakawa | Swimming | Women's 50 m backstroke | 1 August |
| Bronze | Takuro Fujii Ryosuke Irie Kosuke Kitajima Shinri Shioura | Swimming | Men's 4×100 m medley relay | 4 August |

## Diving

Japan qualified four quota places for the following diving events:

### Men

| Athlete | Event | Preliminaries | Preliminaries | Semifinals | Semifinals | Final | Final |
| Athlete | Event | Points | Rank | Points | Rank | Points | Rank |
| Sho Sakai | 3 m springboard | 421.75 | 7 Q | 416.10 | 12 Q | 433.40 | 8 |

### Women

| Athlete | Event | Preliminaries | Preliminaries | Semifinals | Semifinals | Final | Final |
| Athlete | Event | Points | Rank | Points | Rank | Points | Rank |
| Sayaka Shibusawa | 3 m springboard | 262.80 | 18 Q | 284.25 | 14 | Did not advance | Did not advance |
| Mai Nakagawa | 10 m platform | 321.65 | 6 Q | 272.05 | 17 | Did not advance | Did not advance |
| Fuka Tatsumi | 10 m platform | 320.50 | 7 Q | 267.80 | 18 | Did not advance | Did not advance |
| Mai Nakagawa Sayaka Shibusawa | 3 m synchronized springboard | 262.50 | 11 Q | — | — | 250.50 | 11 |

## Open water swimming

Japan qualified three quota places for the following events in open water swimming:
| Athlete | Event | Time | Rank |
| Yasunari Hirai | Men's 10 km | 1:49:52.8 | 21 |
| Yuto Kobayashi | Men's 5 km | 53:48.0 | 25 |
| Yuto Kobayashi | Men's 10 km | 1:50:17.4 | 26 |
| Yumi Kida | Women's 10 km | 1:58:25.8 | 13 |
| Yumi Kida | Women's 25 km | 5:16:25.7 | 8 |
| Yasunari Hirai Yuto Kobayashi Yumi Kida | Mixed team | 58:00.0 | 13 |

## Swimming

Japanese swimmers achieved qualifying standards in the following events (up to a maximum of 2 swimmers in each event at the A-standard entry time, and 1 at the B-standard): Among the official roster featured former Olympic champion Kosuke Kitajima and undisputed superstar Kosuke Hagino.

### Men

| Athlete | Event | Heat | Heat | Semifinal | Semifinal | Final | Final |
| Athlete | Event | Time | Rank | Time | Rank | Time | Rank |
| Takuro Fujii | 100 m butterfly | 52.50 | 15 Q | 52.27 | 13 | Did not advance | Did not advance |
| Kosuke Hagino | 200 m freestyle | 1:47.33 | 4 Q | 1:46.87 | 3 Q | 1:45.94 | 5 |
| Kosuke Hagino | 400 m freestyle | 3:46.92 | 4 Q | — | — | 3:44.82 NR | |
| Kosuke Hagino | 100 m backstroke | 53.94 | 7 Q | 53.68 | 6 Q | 53.93 | 6 |
| Kosuke Hagino | 200 m backstroke | 1:57.52 | 7 Q | 1:56.24 | 4 Q | 1:55.43 | 5 |
| Kosuke Hagino | 200 m individual medley | 1:57.73 | 2 Q | 1:57.38 | 2 Q | 1:56.29 | |
| Kosuke Hagino | 400 m individual medley | 4:13.80 | 4 Q | — | — | 4:10.77 | 5 |
| Ayatsugu Hirai | 800 m freestyle | 7:56.69 | 14 | — | — | Did not advance | Did not advance |
| Ayatsugu Hirai | 1500 m freestyle | 15:03.45 | 9 | — | — | Did not advance | Did not advance |
| Ryosuke Irie | 50 m backstroke | DNS | DNS | Did not advance | Did not advance | Did not advance | Did not advance |
| Ryosuke Irie | 100 m backstroke | 53.66 | 4 Q | 53.41 | 4 Q | 53.29 | 4 |
| Ryosuke Irie | 200 m backstroke | 1:57.53 | 8 Q | 1:56.14 | =3 Q | 1:55.07 | 4 |
| Kenta Ito | 50 m freestyle | 22.77 | 28 | Did not advance | Did not advance | Did not advance | Did not advance |
| Kenta Ito | 100 m freestyle | 49.91 | =31 | Did not advance | Did not advance | Did not advance | Did not advance |
| Kosuke Kitajima | 50 m breaststroke | 27.43 | 9 Q | 27.82 | 15 | Did not advance | Did not advance |
| Kosuke Kitajima | 100 m breaststroke | 59.88 | =3 Q | 59.92 | 8 Q | 59.98 | 6 |
| Yuki Kobori | 100 m butterfly | 53.11 | =25 | Did not advance | Did not advance | Did not advance | Did not advance |
| Yuki Kobori | 200 m butterfly | 1:56.64 | 8 Q | 1:56.15 | 9 | Did not advance | Did not advance |
| Takeshi Matsuda | 200 m butterfly | 1:57.14 | 11 Q | 1:56.42 | 11 | Did not advance | Did not advance |
| Yōsuke Miyamoto | 1500 m freestyle | 15:09.21 | =12 | — | — | Did not advance | Did not advance |
| Daiya Seto | 200 m individual medley | 1:59.25 | 12 Q | 1:58.03 | 6 Q | 1:58.45 | 7 |
| Daiya Seto | 400 m individual medley | 4:12.96 | 2 Q | — | — | 4:08.69 | |
| Shinri Shioura | 50 m freestyle | 22.02 | 10 Q | 22.04 | 15 | Did not advance | Did not advance |
| Shinri Shioura | 100 m freestyle | 48.52 | 4 Q | 48.51 | 10 | Did not advance | Did not advance |
| Ryo Tateishi | 200 m breaststroke | 2:10.41 | 6 Q | 2:10.01 | 8 Q | 2:10.28 | 8 |
| Akihiro Yamaguchi | 100 m breaststroke | 1:00.69 | 19 | Did not advance | Did not advance | Did not advance | Did not advance |
| Akihiro Yamaguchi | 200 m breaststroke | 2:10.17 | 5 Q | 2:10.00 | 7 Q | 2:09.57 | 7 |
| Takuro Fujii Kenta Ito Kenji Kobase Shinri Shioura | 4×100 m freestyle relay | 3:15.46 | 8 Q | — | — | 3:14.75 | 8 |
| Kosuke Hagino Yuki Kobori Takeshi Matsuda Daiya Seto* Sho Sotodate | 4×200 m freestyle relay | 7:09.98 | 3 Q | — | — | 7:04.95 | 5 |
| Takuro Fujii Ryosuke Irie Kosuke Kitajima Shinri Shioura | 4×100 m medley relay | 3:34.25 | 5 Q | — | — | 3:32.26 | |

### Women

| Athlete | Event | Heat | Heat | Semifinal | Semifinal | Final | Final |
| Athlete | Event | Time | Rank | Time | Rank | Time | Rank |
| Sayaka Akase | 100 m backstroke | 1:02.51 | 28 | Did not advance | Did not advance | Did not advance | Did not advance |
| Sayaka Akase | 200 m backstroke | 2:10.87 | 13 Q | 2:11.48 | 13 | Did not advance | Did not advance | Did not advance | Did not advance |
| Natsumi Hoshi | 100 m butterfly | 59.18 | =16 Q* | 59.42 | 16 | Did not advance | Did not advance |
| Natsumi Hoshi | 200 m butterfly | 2:07.59 | 3 Q | 2:07.18 | =4 Q | 2:06.09 | 4 |
| Chihiro Igarashi | 200 m freestyle | 1:59.00 | 17 | Did not advance | Did not advance | Did not advance | Did not advance |
| Chihiro Igarashi | 400 m freestyle | 4:12.44 | 15 | — | — | Did not advance | Did not advance |
| Rie Kaneto | 50 m breaststroke | 32.37 | 34 | Did not advance | Did not advance | Did not advance | Did not advance |
| Rie Kaneto | 200 m breaststroke | 2:23.91 | 4 Q | 2:23.28 | 5 Q | 2:22.96 | 4 |
| Yayoi Matsumoto | 50 m freestyle | 25.69 | 25 | Did not advance | Did not advance | Did not advance | Did not advance |
| Miyu Otsuka | 200 m backstroke | 2:11.69 | 14 Q | 2:11.68 | 14 | Did not advance | Did not advance |
| Miyu Otsuka | 400 m individual medley | 4:37.77 | 8 Q | — | — | 4:39.21 | 8 |
| Satomi Suzuki | 50 m breaststroke | DNS | DNS | Did not advance | Did not advance | Did not advance | Did not advance |
| Satomi Suzuki | 100 m breaststroke | 1:07.79 | 11 Q | 1:07.83 | 12 | Did not advance | Did not advance |
| Satomi Suzuki | 200 m breaststroke | 2:27.31 | 11 Q | 2:25.77 | 11 | Did not advance | Did not advance |
| Miho Takahashi | 400 m individual medley | 4:45.70 | 18 | — | — | Did not advance | Did not advance |
| Aya Terakawa | 50 m backstroke | 28.05 | 3 Q | 27.70 | 2 Q | 27.53 | |
| Aya Terakawa | 100 m backstroke | 1:00.09 | 7 Q | 59.80 | 4 Q | 59.23 | |
| Miho Teramura | 200 m individual medley | 2:12.91 | 12 Q | 2:14.02 | 14 | Did not advance | Did not advance |
| Haruka Ueda | 100 m freestyle | 55.78 | 28 | Did not advance | Did not advance | Did not advance | Did not advance |
| Kanako Watanabe | 100 m breaststroke | 1:09.28 | 26 | Did not advance | Did not advance | Did not advance | Did not advance |
| Kanako Watanabe | 200 m individual medley | 2:12.28 | 9 Q | 2:11.50 | 11 | Did not advance | Did not advance |
| Yayoi Matsumoto Miki Uchida Haruka Ueda Misaki Yamaguchi | 4×100 m freestyle relay | 3:39.24 | 8 Q | — | — | 3:39.45 | 7 |
| Chihiro Igarashi Yasuko Miyamoto Aya Takano Haruka Ueda | 4×200 m freestyle relay | 7:56.98 | 7 Q | — | — | 7:58.15 | 8 |
| Natsumi Hoshi Satomi Suzuki Aya Terakawa Haruka Ueda | 4×100 m medley relay | 4:00.18 | 5 Q | — | — | 3:58.06 | 5 |

## Synchronized swimming

Japan qualified 11 quota places for each of the following synchronized swimming events.
| Athlete | Event | Preliminaries | Preliminaries | Final | Final |
| Athlete | Event | Points | Rank | Points | Rank |
| Yukiko Inui | Solo free routine | 91.570 | 5 Q | 91.600 | 5 |
| Yukiko Inui | Solo technical routine | 91.800 | 5 Q | 91.900 | 5 |
| Yumi Adachi Yukiko Inui | Duet free routine | 91.470 | 5 Q | 91.620 | 5 |
| Yumi Adachi Yukiko Inui | Duet technical routine | 90.400 | 5 Q | 91.700 | 5 |
| Yumi Adachi Aika Hakoyama Mayo Itoyama Hikaru Kazumori Risako Mitsui Kanami Nagamaki Mai Nakamura Misa Sugiyama | Team free routine | 91.670 | 4 Q | 91.950 | 4 |
| Yumi Adachi Miho Arai Aika Hakoyama Yukiko Inui Mayo Itoyama Risako Mitsui Kanami Nagamaki Mai Nakamura | Team technical routine | 92.200 | 4 Q | 92.200 | 4 |
| Yumi Adachi Miho Arai Aika Hakoyama Yukiko Inui Mayo Itoyama Hikaru Kazumori Risako Mitsui Kanami Nagamaki Mai Nakamura Misa Sugiyama Kurumi Yoshida | Free routine combination | 91.590 | 4 Q | 92.020 | 4 |