All available race results Tadaaki Nakai
| Date | Race | Rank |
| Tour of Japan | ||
| 29/05 | Prologue | 85 |
| 30/05 | Stage 2 | 77 |
| 31/05 | Stage 3 | 84 |
| 01/06 | Stage 4 | 87 |
| 02/06 | Stage 5 | 76 |
| 03/06 | Stage 6 | 73 |
| Tour of Sharjah | ||
| 26/10 | Stage 2 | 72 |
| 27/10 | Stage 3 | 72 |
| 28/10 | Stage 4 | 49 |
| General Classification | 60 |
Rider information for 2016
| Rank | 5075 |
| Score | 0 |
| Name | Tadaaki NAKAI |
| Country | Japan |
| Team | Team Ukyo |
| Date | Race | Rank |
| Tour of Japan | ||
| 19/05 | Prologue | 41 |
| 20/05 | Stage 2 | 79 |
| 21/05 | Stage 3 | 71 |
| 22/05 | Stage 4 | 85 |
| 23/05 | Stage 5 | 76 |
| 24/05 | Stage 6 | 66 |
| 25/05 | Stage 7 | 69 |
| 26/05 | Stage 8 | 72 |
| General Classification | 70 | |
| Tour de Kumano | ||
| 30/05 | Prologue | 12 |
| 31/05 | Stage 1 | 3 |
| 01/06 | Stage 2 | 63 |
| 02/06 | Stage 3 | 10 |
| General Classification | 24 |
Rider information for 2019
| Rank | 2296 |
| Score | 7 |
| Name | Tadaaki NAKAI |
| Country | Japan |
| Team | Shimano Racing Team |
No results available in season 2020.
Rider information for 2020
| Rank | 3826 |
| Score | 0 |
| Name | Tadaaki NAKAI |
| Country | Japan |
| Team | Shimano Racing Team |
| Date | Race | Rank |
| 10/10 | Oita Urban Classic Road Race | 37 |
| 24/10 | National Championship Japan | 40 |
Rider information for 2021
| Rank | 4701 |
| Score | 0 |
| Name | Tadaaki NAKAI |
| Country | Japan |
| Team | Shimano Racing Team |
| Date | Race | Rank |
| Tour of Japan | ||
| 19/05 | Stage 1 | 44 |
| 20/05 | Stage 2 | 44 |
| 21/05 | Stage 3 | 30 |
| 22/05 | Stage 4 | 68 |
| General Classification | 40 | |
| Tour de Kumano | ||
| 27/05 | Stage 1 | 42 |
| 28/05 | Stage 2 | 75 |
| 29/05 | Stage 3 | 3 |
| General Classification | 40 | |
| 26/06 | National Championship Japan | 4 |
| Tour de Taiwan | ||
| 02/10 | Stage 1 | 9 |
| 03/10 | Stage 2 | 17 |
| 04/10 | Stage 3 | 7 |
| 05/10 | Stage 4 | 21 |
| 06/10 | Stage 5 | 20 |
| General Classification | 10 | |
| 16/10 | Japan Cup | 36 |
Rider information for 2022
| Rank | 2580 |
| Score | 5 |
| Name | Tadaaki NAKAI |
| Country | Japan |
| Team | Shimano Racing |
| Date | Race | Rank |
| Tour of Japan | ||
| 21/05 | Prologue | 69 |
| 22/05 | Stage 1 | 65 |
| 23/05 | Stage 2 | 72 |
| 24/05 | Stage 3 | 84 |
| 25/05 | Stage 4 | 73 |
| 26/05 | Stage 5 | 51 |
| 27/05 | Stage 6 | 32 |
| 28/05 | Stage 7 | 9 |
| General Classification | 68 | |
| Tour de Kumano | ||
| 03/06 | Stage 1 | 4 |
| 04/06 | Stage 2 | 13 |
| General Classification | 4 | |
| 25/06 | National Championship Japan | 11 |
| 01/10 | Oita Urban Classic Road Race | 9 |
| Tour de Kyushu | ||
| 07/10 | Stage 1 | 23 |
| 08/10 | Stage 2 | 35 |
| 09/10 | Stage 3 | 25 |
| General Classification | 23 | |
| 12/11 | Tour de Okinawa | 9 |
Rider information for 2023
| Rank | 3409 |
| Score | 4 |
| Name | Tadaaki NAKAI |
| Country | Japan |
| Team | Shimano Racing |
| Date | Race | Rank |
| Tour de Kumano | ||
| 10/05 | Stage 1 | 73 |
| 11/05 | Stage 2 | 54 |
| 12/05 | Stage 3 | 31 |
| General Classification | 44 | |
| Tour of Japan | ||
| 19/05 | Prologue | 15 |
| 20/05 | Stage 1 | 36 |
| 21/05 | Stage 2 | 27 |
| 22/05 | Stage 3 | 66 |
| 23/05 | Stage 4 | 71 |
| 24/05 | Stage 5 | 77 |
| 25/05 | Stage 6 | 67 |
| 26/05 | Stage 7 | 77 |
| General Classification | 57 | |
| Tour of Salalah | ||
| 08/09 | Stage 1 | 36 |
| 09/09 | Stage 2 | 49 |
| 10/09 | Stage 3 | 51 |
| 11/09 | Stage 4 | 42 |
| General Classification | 49 | |
| 29/09 | Oita Urban Classic Road Race | 43 |
| Tour de Kyushu | ||
| 12/10 | Stage 1 | 76 |
Rider information for 2024
| Rank | 5554 |
| Score | 0 |
| Name | Tadaaki NAKAI |
| Country | Japan |
| Team | Shimano Racing |
| Date | Race | Rank |
| 23/03 | Grand Prix Apollon Temple | 81 |
| Tour of Mersin | ||
| 10/04 | Stage 1 | 130 |
| 11/04 | Stage 2 | 29 |
| 12/04 | Stage 3 | 112 |
| 13/04 | Stage 4 | 138 |
| General Classification | 112 | |
| Tour of Japan | ||
| 18/05 | Prologue | 58 |
| 19/05 | Stage 1 | 89 |
| 20/05 | Stage 2 | 86 |
| 21/05 | Stage 3 | 11 |
| 22/05 | Stage 4 | 80 |
| 23/05 | Stage 5 | 84 |
| 24/05 | Stage 6 | 65 |
| 25/05 | Stage 7 | 5 |
| General Classification | 81 |
Rider information for 2025
| Rank | 3222 |
| Score | 3 |
| Name | Tadaaki NAKAI |
| Country | Japan |
| Team | Shimano Racing |