| Japan - NPB Reserve League | 2020/10/08 03:30 | Nipponham Fighters - Reserves v Seibu Lions - Reserves | D | 0-0 |
| Japan - NPB Reserve League | 2020/10/07 03:30 | Nipponham Fighters - Reserves v Seibu Lions - Reserves | W | 11-5 |
| Japan - NPB Reserve League | 2020/10/06 03:30 | Nipponham Fighters - Reserves v Seibu Lions - Reserves | W | 11-2 |
| Japan - NPB Reserve League | 2020/09/02 03:56 | Nipponham Fighters - Reserves v Seibu Lions - Reserves | W | 6-5 |
| Japan - NPB Reserve League | 2020/09/01 04:00 | Nipponham Fighters - Reserves v Seibu Lions - Reserves | W | 6-4 |
| Japan - NPB Reserve League | 2020/07/28 04:00 | Nipponham Fighters - Reserves v Seibu Lions - Reserves | L | 5-8 |
| Japan - NPB Reserve League | 2020/06/30 04:00 | Seibu Lions - Reserves v Nipponham Fighters - Reserves | L | 6-1 |
| Japan - NPB Reserve League | 2019/07/03 04:00 | Seibu Lions - Reserves v Nipponham Fighters - Reserves | L | 2-1 |
| Japan - NPB Reserve League | 2021/03/26 04:00 | Nipponham Fighters - Reserves v Yomiuri Giants - Reserves | W | 3-2 |
| Japan - NPB Reserve Exhibition | 2021/02/19 04:00 | Yokohama Bay Stars - Reserves v Nipponham Fighters - Reserves | L | 6-2 |
| Japan - NPB Reserve League | 2020/11/24 03:30 | SoftBank Hawks - Reserves v Nipponham Fighters - Reserves | W | 3-4 |
| Japan - NPB Reserve League | 2020/11/21 03:30 | Nipponham Fighters - Reserves v Chunichi Dragons - Reserves | W | 3-0 |
| Japan - NPB Reserve League | 2020/11/15 03:29 | Hanshin Tigers - Reserves v Nipponham Fighters - Reserves | W | 4-10 |
| Japan - NPB Reserve League | 2020/11/09 03:30 | Nipponham Fighters - Reserves v SoftBank Hawks - Reserves | W | 7-1 |
| Japan - NPB Reserve League | 2020/10/18 04:00 | Nipponham Fighters - Reserves v Yomiuri Giants - Reserves | W | 6-2 |
| Japan - NPB Reserve League | 2020/10/15 03:30 | Yakult Swallows - Reserves v Nipponham Fighters - Reserves | W | 0-1 |
| Japan - NPB Reserve League | 2021/04/22 04:00 | Seibu Lions - Reserves v Yomiuri Giants - Reserves | L | 0-14 |
| Japan - NPB Reserve League | 2021/03/26 03:54 | Yokohama Bay Stars - Reserves v Seibu Lions - Reserves | W | 6-8 |
| Japan - NPB Reserve League | 2021/03/24 04:00 | Yomiuri Giants - Reserves v Seibu Lions - Reserves | W | 1-2 |
| Japan - NPB Reserve League | 2021/03/23 04:00 | Yomiuri Giants - Reserves v Seibu Lions - Reserves | W | 0-1 |
| Japan - NPB Reserve League | 2020/11/29 02:00 | Seibu Lions - Reserves v Hiroshima Carp - Reserves | W | 2-0 |
| Japan - NPB Reserve League | 2020/11/28 03:30 | Seibu Lions - Reserves v Rakuten Eagles - Reserves | D | 5-5 |
| Japan - NPB Reserve League | 2020/11/27 03:30 | SoftBank Hawks - Reserves v Seibu Lions - Reserves | L | 3-2 |
| Japan - NPB Reserve League | 2020/11/22 03:30 | Chiba Lotte Marines - Reserves v Seibu Lions - Reserves | L | 9-4 |