| Sex | Athlete | DOB | Discipline | Round | POS | Mark |
|---|---|---|---|---|---|---|
| W | Chiseno IKEDA | 15/08/2005 | U20 Race | Final | 26 | 21:32 |
| W | Narumi OKUMOTO | 27/02/2006 | U20 Race | Final | 40 | 22:12 |
| W | Misaki SHITAMORI | 04/08/2005 | U20 Race | Final | 20 | 21:19 |
| W | Aoi HOSOKAWA | 12/12/2006 | U20 Race | Final | 33 | 21:46 |
| W | Miyu MURAKAMI | 19/08/2007 | U20 Race | Final | 19 | 21:12 |
| M | Tomoya INOUE | 27/06/2006 | U20 Race | Final | 16 | 23:58 |
| M | Kaito MATSUI | 29/01/2006 | U20 Race | Final | 19 | 24:21 |
| M | Sota ORITA | 18/09/2005 | U20 Race | Final | 20 | 24:25 |
| M | Nao NANATSUE | 17/03/2006 | U20 Race | Final | 41 | 25:14 |
| M | Tetsu SASAKI | 24/11/2006 | U20 Race | Final | 65 | 26:03 |
| M | Yamato HAMAGUCHI | 03/05/2006 | U20 Race | Final | 22 | 24:29 |
| X | Japan | Mixed Relay | Final | 7 | 23:18 | |
| W | Momoka KAWAGUCHI | 28/06/1998 | Senior Race | Final | 59 | 36:15 |
| W | Azusa MIHARA | 16/02/2003 | Senior Race | Final | 29 | 34:09 |
| W | Miku SAKAI | 05/10/2002 | Senior Race | Final | 22 | 33:24 |
| W | Erika TANOURA | 01/02/2000 | Senior Race | Final | 27 | 34:00 |
| M | Tomoya OGIKUBO | 11/12/1997 | Senior Race | Final | 75 | 31:28 |
| M | Tomonori YAMAGUCHI | 13/04/2003 | Senior Race | Final | 66 | 30:49 |
| M | Hiroto FUJIMAGARI | 26/05/1997 | Senior Race | Final | 48 | 30:15 |
| M | Ryuto IGAWA | 05/09/2000 | Senior Race | Final | 55 | 30:23 |