| Sex | Athlete | DOB | Discipline | Round | POS | Mark |
|---|---|---|---|---|---|---|
| M | Naoto TOBE | 31/03/1992 | High Jump | Qualification | 2 | 2.28 |
| M | Takashi ETO | 05/02/1991 | High Jump | Qualification | 10 | 2.21 |
| M | Ryuji MIURA | 21/02/2002 | 3000 Metres Steeplechase | Heats | 2 | 8:09.92 |
| M | Ryoma AOKI | 16/06/1997 | 3000 Metres Steeplechase | Heats | 9 | 8:24.82 |
| M | Kosei YAMAGUCHI | 19/08/1991 | 3000 Metres Steeplechase | Heats | 12 | 8:31.27 |
| M | Takatoshi ABE | 12/11/1991 | 400 Metres Hurdles | Heats | 6 | 49.98 |
| M | Hiromu YAMAUCHI | 24/08/1999 | 400 Metres Hurdles | Heats | 3 | 49.21 |
| M | Kazuki KUROKAWA | 17/06/2001 | 400 Metres Hurdles | Heats | 6 | 50.30 |
| W | Kaede HAGITANI | 10/10/2000 | 5000 Metres | Heats | 12 | 15:04.95 |
| W | Nozomi TANAKA | 04/09/1999 | 5000 Metres | Heats | 6 | 14:59.93 |
| W | Ririka HIRONAKA | 24/11/2000 | 5000 Metres | Heats | 9 | 14:55.87 |
| M | Tatsuhiko ITO | 23/03/1998 | 10,000 Metres | Final | 21 | 29:01.31 |
| M | Akira AIZAWA | 18/07/1997 | 10,000 Metres | Final | 16 | 28:18.37 |
| Sex | Athlete | DOB | Discipline | Round | POS | Mark |
|---|---|---|---|---|---|---|
| M | Masaki EJIMA | 06/03/1999 | Pole Vault | Qualification | 12 | 5.30 |
| M | Seito YAMAMOTO | 11/03/1992 | Pole Vault | Qualification | 14 | 5.30 |
| W | Ayako KIMURA | 11/06/1988 | 100 Metres Hurdles | Heats | 7 | 13.25 |
| W | Masumi AOKI | 16/04/1994 | 100 Metres Hurdles | Heats | 7 | 13.59 |
| W | Asuka TERADA | 14/01/1990 | 100 Metres Hurdles | Heats | 5 | 12.95 |
| M | Shoutarou SHIROYAMA | 06/03/1995 | Long Jump | Qualification | 12 | 7.70 |
| M | Yuki HASHIOKA | 23/01/1999 | Long Jump | Qualification | 1 | 8.17 |
| M | Hibiki TSUHA | 21/01/1998 | Long Jump | Qualification | 14 | 7.61 |
| M | Shuhei TADA | 24/06/1996 | 100 Metres | Heats | 6 | 10.22 |
| M | Yuki KOIKE | 13/05/1995 | 100 Metres | Heats | 4 | 10.22 |
| M | Ryota YAMAGATA | 10/06/1992 | 100 Metres | Heats | 4 | 10.15 |
| Sex | Athlete | DOB | Discipline | Round | POS | Mark |
|---|---|---|---|---|---|---|
| W | Yuno YAMANAKA | 25/12/2000 | 3000 Metres Steeplechase | Heats | 10 | 9:43.83 |
| M | Julian Jrummi WALSH | 18/09/1996 | 400 Metres | Heats | 6 | 46.57 |
| M | Naoto TOBE | 31/03/1992 | High Jump | Final | 13 | 2.24 |
| W | Asuka TERADA | 14/01/1990 | 100 Metres Hurdles | Semi-Final | 6 | 13.06 |
| M | Hiromu YAMAUCHI | 24/08/1999 | 400 Metres Hurdles | Semi-Final | 6 | 49.35 |
| Sex | Athlete | DOB | Discipline | Round | POS | Mark |
|---|---|---|---|---|---|---|
| W | Nozomi TANAKA | 04/09/1999 | 1500 Metres | Heats | 4 | 4:02.33 |
| W | Ran URABE | 16/06/1995 | 1500 Metres | Heats | 9 | 4:07.90 |
| M | Yuki HASHIOKA | 23/01/1999 | Long Jump | Final | 6 | 8.10 |
| M | Ryuji MIURA | 21/02/2002 | 3000 Metres Steeplechase | Final | 7 | 8:16.90 |
| W | Ririka HIRONAKA | 24/11/2000 | 5000 Metres | Final | 9 | 14:52.84 |
| Sex | Athlete | DOB | Discipline | Round | POS | Mark |
|---|---|---|---|---|---|---|
| W | Haruka KITAGUCHI | 16/03/1998 | Javelin Throw | Qualification | 4 | 62.06 |
| M | Shota IIZUKA | 25/06/1991 | 200 Metres | Heats | 6 | 21.02 |
| M | Abdul Hakim SANI BROWN | 06/03/1999 | 200 Metres | Heats | 6 | 21.41 |
| M | Jun YAMASHITA | 23/08/1997 | 200 Metres | Heats | 5 | 20.78 |
| M | Shunsuke IZUMIYA | 26/01/2000 | 110 Metres Hurdles | Heats | 2 | 13.28 |
| M | Shunya TAKAYAMA | 03/09/1994 | 110 Metres Hurdles | Heats | 6 | 13.98 |
| M | Taio KANAI | 28/09/1995 | 110 Metres Hurdles | Heats | 3 | 13.41 |
| M | Yuta BANDO | 21/11/1996 | 5000 Metres | Heats | 17 | 14:05.80 |
| M | Hiroki MATSUEDA | 20/05/1993 | 5000 Metres | Heats | 18 | 14:15.54 |
| Sex | Athlete | DOB | Discipline | Round | POS | Mark |
|---|---|---|---|---|---|---|
| M | Takuto KOMINAMI | 26/07/1995 | Javelin Throw | Qualification | 9 | 78.39 |
| M | Shunsuke IZUMIYA | 26/01/2000 | 110 Metres Hurdles | Semi-Final | 3 | 13.35 |
| M | Taio KANAI | 28/09/1995 | 110 Metres Hurdles | Semi-Final | 8 | 26.11 |
| W | Nozomi TANAKA | 04/09/1999 | 1500 Metres | Semi-Final | 5 | 3:59.19 |
| Sex | Athlete | DOB | Discipline | Round | POS | Mark |
|---|---|---|---|---|---|---|
| W | Japan | 4x100 Metres Relay | Heats | 7 | 43.44 | |
| M | Japan | 4x100 Metres Relay | Heats | 2 | 38.16 | |
| M | Koki IKEDA | 03/05/1998 | 20 Kilometres Race Walk | Final | 2 | 1:21:14 |
| M | Eiki TAKAHASHI | 19/11/1992 | 20 Kilometres Race Walk | Final | 32 | 1:27:29 |
| M | Toshikazu YAMANISHI | 15/02/1996 | 20 Kilometres Race Walk | Final | 3 | 1:21:28 |
| Sex | Athlete | DOB | Discipline | Round | POS | Mark |
|---|---|---|---|---|---|---|
| M | Masatora KAWANO | 23/10/1998 | 50 Kilometres Race Walk | Final | 6 | 3:51:56 |
| M | Satoshi MARUO | 28/11/1991 | 50 Kilometres Race Walk | Final | 32 | 4:06:44 |
| M | Hayato KATSUKI | 28/11/1990 | 50 Kilometres Race Walk | Final | 30 | 4:06:32 |
| W | Nanako FUJII | 07/05/1999 | 20 Kilometres Race Walk | Final | 13 | 1:31:55 |
| W | Kaori KAWAZOE | 30/09/1995 | 20 Kilometres Race Walk | Final | 40 | 1:39:31 |
| W | Kumiko OKADA | 17/10/1991 | 20 Kilometres Race Walk | Final | 15 | 1:31:57 |
| M | Japan | 4x400 Metres Relay | Heats | 5 | 3:00.76 | |
| W | Haruka KITAGUCHI | 16/03/1998 | Javelin Throw | Final | 12 | 55.42 |
| W | Nozomi TANAKA | 04/09/1999 | 1500 Metres | Final | 8 | 3:59.95 |
| M | Japan | 4x100 Metres Relay | Final | DNF |
| Sex | Athlete | DOB | Discipline | Round | POS | Mark |
|---|---|---|---|---|---|---|
| W | Honami MAEDA | 17/07/1996 | Marathon | Final | 33 | 2:35:28 |
| W | Ayuko SUZUKI | 08/10/1991 | Marathon | Final | 19 | 2:33:14 |
| W | Mao ICHIYAMA | 29/05/1997 | Marathon | Final | 8 | 2:30:13 |
| W | Yuka ANDO | 16/03/1994 | 10,000 Metres | Final | 22 | 32:40.77 |
| W | Hitomi NIIYA | 26/02/1988 | 10,000 Metres | Final | 21 | 32:23.87 |
| W | Ririka HIRONAKA | 24/11/2000 | 10,000 Metres | Final | 7 | 31:00.71 |
| Sex | Athlete | DOB | Discipline | Round | POS | Mark |
|---|---|---|---|---|---|---|
| M | Suguru OSAKO | 23/05/1991 | Marathon | Final | 6 | 2:10:41 |
| M | Yuma HATTORI | 13/11/1993 | Marathon | Final | 72 | 2:30:08 |
| M | Shogo NAKAMURA | 16/09/1992 | Marathon | Final | 61 | 2:22:23 |