# Japan at the 2023 World Athletics Championships

Japan competed at the 2023 World Athletics Championships in Budapest, Hungary, from 19 to 27 August 2023.

## Medallists

| Medal | Name | Event | Date |
| Gold | Haruka Kitaguchi | Women's javelin throw | 25 August |
| Bronze | Masatora Kawano | Men's 35 kilometres walk | 24 August |

## Results

Japan entered 76 athletes.

### Key

* 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
* PB = Personal best
* SB = Season best
* N/A = Round not applicable for the event

### Men
#### Track and road events

| Athlete | Event | Heat | Heat | Semifinal | Semifinal | Final | Final |
| Athlete | Event | Result | Rank | Result | Rank | Result | Rank |
| Ryuichiro Sakai | 100 metres | 10.22 | 5 | Did not advance | Did not advance | Did not advance | Did not advance |
| Abdul Hakim Sani Brown | 100 metres | 10.07 SB | 1 Q | 9.97 =PB | 2 Q | 10.04 | 6 |
| Hiroki Yanagita | 100 metres | 10.20 | 3 Q | 10.14 | 7 | Did not advance | Did not advance |
| Shōta Iizuka | 200 metres | 20.27 SB | 4 q | 20.54 | 7 | Did not advance | Did not advance |
| Koki Ueyama | 200 metres | 20.66 | 4 | Did not advance | Did not advance | Did not advance | Did not advance |
| Towa Uzawa | 200 metres | 20.34 | 1 Q | 20.33 | 5 | Did not advance | Did not advance |
| Yuki Joseph Nakajima | 400 metres | 45.15 | 3 Q | 45.04 | 3 | Did not advance | Did not advance |
| Fuga Sato | 400 metres | 44.97 PB | 2 Q | 44.88 PB | 4 | Did not advance | Did not advance |
| Kentaro Sato | 400 metres | 44.77 NR | 2 Q | 44.99 | 5 | Did not advance | Did not advance |
| Hyuga Endo | 5000 metres | 13:50.49 | 17 | — | Did not advance | Did not advance |
| Kazuya Shiojiri | 5000 metres | 13:51.00 | 18 | — |
| Ren Tazawa | 10,000 metres | — | 28:25.85 | 15 |
| Kazuya Nishiyama | Marathon | — | 2:17:41 | 42 |
| Kenya Sonota | Marathon | — | 2:16:40 | 35 |
| Ichitaka Yamashita | Marathon | — | 2:11:19 | 12 |
| Shunsuke Izumiya | 110 metres hurdles | 13.33 | 2 Q | 13.16 | 1 Q | 13.19 | 5 |
| Shunya Takayama | 110 metres hurdles | 13.35 | 2 Q | 13.34 | 5 | Did not advance | Did not advance |
| Taiga Yokochi | 110 metres hurdles | 14.39 | 8 qR | 14.93 | 9 | Did not advance | Did not advance |
| Takayuki Kishimoto | 400 metres hurdles | 50.90 | 8 | Did not advance | Did not advance | Did not advance | Did not advance |
| Yusaku Kodama | 400 metres hurdles | 50.18 | 8 | Did not advance | Did not advance | Did not advance | Did not advance |
| Kazuki Kurokawa | 400 metres hurdles | 48.71 SB | 3 Q | 48.58 PB | 4 | Did not advance | Did not advance |
| Ryoma Aoki | 3000 metres steeplechase | 8:20.54 SB | 5 Q | — | 8:24.77 | 14 |
| Ryuji Miura | 3000 metres steeplechase | 8:18.73 | 4 Q | — | 8:13.70 | 6 |
| Seiya Sunada | 3000 metres steeplechase | 8:38.59 | 11 | — | Did not advance | Did not advance |
| Koki Ikeda | 20 kilometres walk | — | 1:19:44 | 15 |
| Yuta Koga | 20 kilometres walk | — | 1:19:02 SB | 12 |
| Eiki Takahashi | 20 kilometres walk | — | 1:20:25 | 21 |
| Toshikazu Yamanishi | 20 kilometres walk | — | 1:21:39 | 24 |
| Masatora Kawano | 35 kilometres walk | — | 2:25:12 | |
| Satoshi Maruo | 35 kilometres walk | — | 2:25:50 | 6 |
| Tomohiro Noda | 35 kilometres walk | — | 2:29:52 | 13 |
| Yuki Koike Ryuichiro Sakai Abdul Hakim Sani Brown Hiroki Yanagita | 4 × 100 metres relay | 37.71 SB | 3 Q | — | 37.83 | 5 |
| Naohiro Jinushi Yuki Joseph Nakajima Fuga Sato Kentaro Sato | 4 × 400 metres relay | 3:00.39 SB | 5 | — | Did not advance | Did not advance |

#### Field events

| Athlete | Event | Qualification | Qualification | Final | Final |
| Athlete | Event | Distance | Position | Distance | Position |
| Ryoichi Akamatsu | High jump | 2.28 | 1 q | 2.25 | =8 |
| Naoto Hasegawa | High jump | 2.25 =SB | 18 | Did not advance | Did not advance | Did not advance | Did not advance |
| Tomohiro Shinno | High jump | 2.18 | 31 | Did not advance | Did not advance | Did not advance | Did not advance |
| Tomoya Karasawa | Pole vault | NM | NM | Did not advance | Did not advance |
| Yuki Hashioka | Long jump | 7.94 | 17 | Did not advance | Did not advance |
| Shotaro Shiroyama | Long jump | 7.46 | 32 | Did not advance | Did not advance |
| Hiromichi Yoshida | Long jump | 7.60 | 28 | Did not advance | Did not advance |
| Hikaru Ikehata | Triple jump | 16.40 | 19 | Did not advance | Did not advance |
| Genki Dean | Javelin throw | 79.21 | 14 | Did not advance | Did not advance |
| Kenji Ogura | Javelin throw | 76.65 | 22 | Did not advance | Did not advance |
| Yuta Sakiyama | Javelin throw | NM | 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 |
| Yuma Maruyama | Result | 10.90 | 7.00 | 13.40 | 1.96 | 50.75 | 14.18 | 41.56 | 4.60 | 60.14 | 4:32.01 | 7844 PB | 15 |
| Yuma Maruyama | Points | 883 | 814 | 692 | 767 | 780 | 951 | 696 | 790 | 740 | 730 | 7844 PB | 15 |

### Women
#### Track and road events

| Athlete | Event | Heat | Heat | Semifinal | Semifinal | Final | Final |
| Athlete | Event | Result | Rank | Result | Rank | Result | Rank |
| Arisa Kimishima | 100 metres | 11.73 | 7 | Did not advance | Did not advance | Did not advance | Did not advance |
| Remi Tsuruta | 200 metres | 23.49 | 6 | Did not advance | Did not advance | Did not advance | Did not advance |
| Yume Goto | 1500 metres | 4:10.22 | 12 | Did not advance | Did not advance | Did not advance | Did not advance |
| Nozomi Tanaka | 1500 metres | 4:04.36 SB | 6 Q | 4:06.71 | 12 | Did not advance | Did not advance | Did not advance | Did not advance |
| Ririka Hironaka | 5000 metres | 15:11.16 SB | 12 | — | Did not advance | Did not advance |
| Nozomi Tanaka | 5000 metres | 14:37.98 NR | 6 Q | — | 14:58.99 | 8 |
| Yuma Yamamoto | 5000 metres | 16:05.57 | 20 | — | Did not advance | Did not advance |
| Rino Goshima | 10,000 metres | — | 33:20.38 | 20 |
| Ririka Hironaka | 10,000 metres | — | 31:35.12 SB | 7 |
| Rika Kaseda | Marathon | — | 2:31:53 | 19 |
| Mizuki Matsuda | Marathon | — | 2:29:15 | 13 |
| Sayaka Sato | Marathon | — | 2:31:57 | 20 |
| Masumi Aoki | 100 metres hurdles | 13.26 | 8 | Did not advance | Did not advance | Did not advance | Did not advance |
| Yumi Tanaka | 100 metres hurdles | 13.12 | 7 | Did not advance | Did not advance | Did not advance | Did not advance |
| Asuka Terada | 100 metres hurdles | 13.15 | 6 | Did not advance | Did not advance | Did not advance | Did not advance |
| Eri Utsunomiya | 400 metres hurdles | 57.98 | 8 | Did not advance | Did not advance | Did not advance | Did not advance |
| Ami Yamamoto | 400 metres hurdles | 57.76 | 8 | Did not advance | Did not advance | Did not advance | Did not advance |
| Nanako Fujii | 20 kilometres walk | — | 1:30:10 | 14 |
| Yukiko Umeno | 20 kilometres walk | — | 1:36:52 | 35 |
| Ayane Yanai | 20 kilometres walk | — | 1:34:59 | 30 |
| Masumi Fuchise | 35 kilometres walk | — | 2:52:57 PB | 14 |
| Serena Sonoda | 35 kilometres walk | — | 2:46:32 | 7 |

#### Field events

| Athlete | Event | Qualification | Qualification | Final | Final |
| Athlete | Event | Distance | Position | Distance | Position |
| Sumire Hata | Long jump | 6.41 | 23 | Did not advance | Did not advance |
| Mariko Morimoto | Triple jump | 13.64 | =26 | Did not advance | Did not advance |
| Maoko Takashima | Triple jump | 13.34 | 34 | Did not advance | Did not advance |
| Maki Saito | Discus throw | 53.20 | 36 | Did not advance | Did not advance |
| Haruka Kitaguchi | Javelin throw | 63.27 | 3 Q | 66.73 | |
| Marina Saito | Javelin throw | 58.95 | 15 | Did not advance | Did not advance |
| Momone Ueda | Javelin throw | 56.19 | 21 | Did not advance | Did not advance |