All available race results Takahiro Koyama
| Date | Race | Rank |
| Tour of Japan | ||
| 17/05 | Prologue | 95 |
| 19/05 | Stage 2 | 89 |
| 20/05 | Stage 3 | 88 |
| 21/05 | Stage 4 | 87 |
| 22/05 | Stage 5 | 72 |
| 23/05 | Stage 6 | 79 |
| 24/05 | Stage 7 | 40 |
| General Classification | 88 |
Rider information for 2015
| Rank | 4904 |
| Score | 0 |
| Name | Takahiro KOYAMA |
| Country | Japan |
| Team | Shimano Racing Team |
No results available in season 2016.
Rider information for 2016
| Rank | 5328 |
| Score | 0 |
| Name | Takahiro KOYAMA |
| Country | Japan |
| Team | Shimano Racing Team |
| Date | Race | Rank |
| Tour of Thailand | ||
| 01/04 | Stage 1 | 65 |
| 02/04 | Stage 2 | 27 |
| 03/04 | Stage 3 | 79 |
| 04/04 | Stage 4 | 36 |
| 05/04 | Stage 5 | 38 |
| 06/04 | Stage 6 | 56 |
| General Classification | 36 |
Rider information for 2017
| Rank | 4589 |
| Score | 0 |
| Name | Takahiro KOYAMA |
| Country | Japan |
| Team | Shimano Racing Team |
| Date | Race | Rank |
| Tour of Thailand | ||
| 01/04 | Stage 1 | 47 |
| 02/04 | Stage 2 | 60 |
| 03/04 | Stage 3 | 88 |
| 04/04 | Stage 4 | 88 |
| 05/04 | Stage 5 | 78 |
| 06/04 | Stage 6 | 64 |
| General Classification | 83 |
Rider information for 2018
| Rank | 4820 |
| Score | 0 |
| Name | Takahiro KOYAMA |
| Country | Japan |
| Team | Shimano Racing Team |
No results available in season 2019.
Rider information for 2019
| Rank | 5435 |
| Score | 0 |
| Name | Takahiro KOYAMA |
| Country | Japan |
| Team | Shimano Racing Team |
No results available in season 2020.
Rider information for 2020
| Rank | 3917 |
| Score | 0 |
| Name | Takahiro KOYAMA |
| Country | Japan |
| Team | Victoire Hiroshima |
No results available in season 2021.
Rider information for 2021
| Rank | 4293 |
| Score | 0 |
| Name | Takahiro KOYAMA |
| Country | Japan |
| Team | Elite without contract |