| Sex | Athlete | DOB | Discipline | Round | POS | Mark |
|---|---|---|---|---|---|---|
| M | Masatora KAWANO | 23/10/1998 | 35 Kilometres Race Walk | Final | 18 | 2:37:15 |
| M | Satoshi MARUO | 28/11/1991 | 35 Kilometres Race Walk | Final | 26 | 2:40:29 |
| M | Hayato KATSUKI | 28/11/1990 | 35 Kilometres Race Walk | Final | 3 | 2:29:16 |
| W | Masumi FUCHISE | 02/09/1986 | 35 Kilometres Race Walk | Final | 21 | 3:03:29 |
| W | Yukiko UMENO | 08/01/2003 | 35 Kilometres Race Walk | Final | 15 | 2:56:28 |
| W | Maika YAGI | 21/01/1999 | 35 Kilometres Race Walk | Final | 20 | 3:01:27 |
| W | Nanaka KORI | 02/05/1997 | Discus Throw | Qualification | 18 | 54.59 |
| X | Japan | 4x400 Metres Relay | Heats | 5 | 3:12.08 | |
| M | Ryuji MIURA | 11/02/2002 | 3000 Metres Steeplechase | Heats | 3 | 8:30.43 |
| W | Sumire HATA | 04/05/1996 | Long Jump | Qualification | 10 | 6.45 |
| W | Nozomi TANAKA | 04/09/1999 | 1500 Metres | Heats | 10 | 4:07.34 |
| W | Tomoka KIMURA | 12/11/1994 | 1500 Metres | Heats | 14 | 4:15.70 |
| M | Yuhi MORI | 14/12/2003 | 100 Metres | Heats | 7 | 10.37 |
| M | Yoshihide KIRYU | 15/12/1995 | 100 Metres | Heats | 5 | 10.28 |
| M | Abdul Hakim SANI BROWN | 06/03/1999 | 100 Metres | Heats | 7 | 10.37 |
| W | Mikuni YADA | 29/10/1999 | 10,000 Metres | Final | 20 | 32:28.94 |
| W | Ririka HIRONAKA | 24/11/2000 | 10,000 Metres | Final | 6 | 31:09.62 |
| X | Japan | 4x400 Metres Relay | Final | 8 | 3:17.53 |
| Sex | Athlete | DOB | Discipline | Round | POS | Mark |
|---|---|---|---|---|---|---|
| W | Kana KOBAYASHI | 04/04/2001 | Marathon | Final | 7 | 2:28:50 |
| W | Sayaka SATO | 27/05/1994 | Marathon | Final | 13 | 2:31:15 |
| W | Yuka ANDO | 16/03/1994 | Marathon | Final | 28 | 2:35:37 |
| M | Kazuto IIZAWA | 02/02/2001 | 1500 Metres | Heats | 13 | 3:41.76 |
| W | Mako FUKUBE | 28/10/1995 | 100 Metres Hurdles | Heats | 4 | 12.92 |
| W | Hitomi NAKAJIMA | 13/07/1995 | 100 Metres Hurdles | Heats | 5 | 12.88 |
| W | Yumi TANAKA | 15/12/1998 | 100 Metres Hurdles | Heats | 6 | 13.05 |
| M | Fuga SATO | 01/06/1996 | 400 Metres | Heats | 5 | 45.10 |
| M | Yuki Joseph NAKAJIMA | 30/03/2002 | 400 Metres | Heats | 2 | 44.44 |
| M | Ryoichi AKAMATSU | 02/05/1995 | High Jump | Qualification | 1 | 2.25 |
| M | Yuto SEKO | 16/03/1998 | High Jump | Qualification | 3 | 2.25 |
| M | Tomohiro SHINNO | 17/08/1996 | High Jump | Qualification | 6 | 2.21 |
| W | Nanako MATSUMOTO | 03/09/1996 | 400 Metres | Heats | 7 | 52.41 |
| M | Jun KASAI | 24/10/2000 | 10,000 Metres | Final | 22 | 29:41.84 |
| M | Mebuki SUZUKI | 03/06/2001 | 10,000 Metres | Final | 20 | 29:33.60 |
| Sex | Athlete | DOB | Discipline | Round | POS | Mark |
|---|---|---|---|---|---|---|
| M | Yuya YOSHIDA | 23/04/1997 | Marathon | Final | 34 | 2:16:58 |
| M | Ryota KONDO | 05/10/1999 | Marathon | Final | 11 | 2:10:53 |
| M | Naoki KOYAMA | 12/05/1996 | Marathon | Final | 23 | 2:13:42 |
| M | Shota FUKUDA | 28/11/2000 | Hammer Throw | Qualification | 15 | 72.71 |
| W | Misaki MOROTA | 06/10/1998 | Pole Vault | Qualification | 14 | 4.25 |
| W | Miu SAITO | 22/06/2002 | 3000 Metres Steeplechase | Heats | 6 | 9:24.72 |
| M | Shunta INOUE | 04/07/2002 | 400 Metres Hurdles | Heats | 8 | 49.73 |
| M | Ken TOYODA | 15/10/2002 | 400 Metres Hurdles | Heats | 8 | 51.80 |
| M | Daiki OGAWA | 17/04/2003 | 400 Metres Hurdles | Heats | 6 | 50.08 |
| M | Riku ITO | 16/01/2001 | Long Jump | Qualification | 16 | 7.68 |
| M | Hibiki TSUHA | 21/01/1998 | Long Jump | Qualification | 17 | 7.42 |
| M | Yuki HASHIOKA | 23/01/1999 | Long Jump | Qualification | 7 | 7.95 |
| M | Shusei NOMOTO | 25/10/1995 | 110 Metres Hurdles | Heats | 4 | 13.29 |
| M | Rachid MURATAKE | 06/02/2002 | 110 Metres Hurdles | Heats | 2 | 13.22 |
| M | Shunsuke IZUMIYA | 26/01/2000 | 110 Metres Hurdles | Heats | 5 | 13.52 |
| W | Mako FUKUBE | 28/10/1995 | 100 Metres Hurdles | Semi-Final | 7 | 13.06 |
| W | Hitomi NAKAJIMA | 13/07/1995 | 100 Metres Hurdles | Semi-Final | 7 | 13.02 |
| M | Ryuji MIURA | 11/02/2002 | 3000 Metres Steeplechase | Final | 8 | 8:35.90 |
| Sex | Athlete | DOB | Discipline | Round | POS | Mark |
|---|---|---|---|---|---|---|
| M | Ko OCHIAI | 17/08/2006 | 800 Metres | Heats | 7 | 1:46.78 |
| W | Mariko MORIMOTO | 17/03/1995 | Triple Jump | Qualification | 17 | 13.10 |
| W | Maoko TAKASHIMA | 07/07/1999 | Triple Jump | Qualification | 13 | 13.66 |
| M | Yuto SEKO | 16/03/1998 | High Jump | Final | 10 | 2.20 |
| M | Ryoichi AKAMATSU | 02/05/1995 | High Jump | Final | 8 | 2.24 |
| M | Rachid MURATAKE | 06/02/2002 | 110 Metres Hurdles | Semi-Final | 2 | 13.17 |
| M | Shusei NOMOTO | 25/10/1995 | 110 Metres Hurdles | Semi-Final | 3 | 13.30 |
| M | Shunsuke IZUMIYA | 26/01/2000 | 110 Metres Hurdles | Semi-Final | DNF | |
| M | Yuki Joseph NAKAJIMA | 30/03/2002 | 400 Metres | Semi-Final | 2 | 44.53 |
| M | Rachid MURATAKE | 06/02/2002 | 110 Metres Hurdles | Final | 5 | 13.18 |
| Sex | Athlete | DOB | Discipline | Round | POS | Mark |
|---|---|---|---|---|---|---|
| M | Yuta SAKIYAMA | 05/04/1996 | Javelin Throw | Qualification | 15 | 77.61 |
| M | Gen NAGANUMA | 31/03/1998 | Javelin Throw | Qualification | 17 | 74.70 |
| M | Roderick Genki DEAN | 30/12/1991 | Javelin Throw | Qualification | 16 | 77.01 |
| W | Abigeirufuka IDO | 15/06/2001 | 200 Metres | Heats | 5 | 22.98 |
| M | Shota IIZUKA | 25/06/1991 | 200 Metres | Heats | 6 | 20.64 |
| M | Soshi MIZUKUBO | 01/03/1999 | 200 Metres | Heats | 7 | 20.51 |
| M | Towa UZAWA | 25/11/2002 | 200 Metres | Heats | 3 | 20.39 |
| Sex | Athlete | DOB | Discipline | Round | POS | Mark |
|---|---|---|---|---|---|---|
| W | Ririka HIRONAKA | 24/11/2000 | 5000 Metres | Heats | 13 | 15:10.68 |
| W | Yuma YAMAMOTO | 01/05/2000 | 5000 Metres | Heats | 18 | 15:36.29 |
| W | Nozomi TANAKA | 04/09/1999 | 5000 Metres | Heats | 5 | 14:47.14 |
| W | Nagisa TAKAHASHI | 15/01/2000 | High Jump | Qualification | 11 | 1.88 |
| W | Rin KUBO | 20/01/2008 | 800 Metres | Heats | 7 | 2:02.84 |
| M | Towa UZAWA | 25/11/2002 | 200 Metres | Semi-Final | 6 | 20.23 |
| W | Abigeirufuka IDO | 15/06/2001 | 200 Metres | Semi-Final | 8 | 23.15 |
| M | Yuki Joseph NAKAJIMA | 30/03/2002 | 400 Metres | Final | 6 | 44.62 |
| Sex | Athlete | DOB | Discipline | Round | POS | Mark |
|---|---|---|---|---|---|---|
| W | Haruka KITAGUCHI | 16/03/1998 | Javelin Throw | Qualification | 8 | 60.38 |
| W | Momone UEDA | 27/06/1999 | Javelin Throw | Qualification | 7 | 60.49 |
| W | Sae TAKEMOTO | 23/11/1999 | Javelin Throw | Qualification | 15 | 55.11 |
| M | Nagiya MORI | 03/07/1999 | 5000 Metres | Heats | 15 | 13:29.44 |
| Sex | Athlete | DOB | Discipline | Round | POS | Mark |
|---|---|---|---|---|---|---|
| W | Nanako FUJII | 07/05/1999 | 20 Kilometres Race Walk | Final | 3 | 1:26:18 |
| W | Kumiko OKADA | 17/10/1991 | 20 Kilometres Race Walk | Final | 18 | 1:30:12 |
| W | Ayane YANAI | 24/12/2003 | 20 Kilometres Race Walk | Final | 37 | 1:35:44 |
| M | Masateru YUGAMI | 14/04/1993 | Discus Throw | Qualification | 19 | 56.40 |
| M | Satoshi MARUO | 28/11/1991 | 20 Kilometres Race Walk | Final | 9 | 1:20:09 |
| M | Toshikazu YAMANISHI | 15/02/1996 | 20 Kilometres Race Walk | Final | 28 | 1:22:39 |
| M | Kento YOSHIKAWA | 09/08/2001 | 20 Kilometres Race Walk | Final | 7 | 1:19:46 |
| M | Japan | 4x400 Metres Relay | Heats | 6 | 2:59.74 | |
| M | Japan | 4x100 Metres Relay | Heats | 3 | 38.07 | |
| W | Nozomi TANAKA | 04/09/1999 | 5000 Metres | Final | 12 | 15:07.34 |
| Sex | Athlete | DOB | Discipline | Round | POS | Mark |
|---|---|---|---|---|---|---|
| M | Japan | 4x100 Metres Relay | Final | 6 | 38.35 |