| Japan - NPB Reserve League | 2023/06/20 04:00 | Nipponham Fighters - Reserves v Seibu Lions - Reserves | L | 2-3 |
| Japan - NPB Reserve League | 2023/06/01 04:00 | Seibu Lions - Reserves v Nipponham Fighters - Reserves | L | 9-1 |
| Japan - NPB Reserve League | 2023/05/31 04:00 | Seibu Lions - Reserves v Nipponham Fighters - Reserves | L | 3-1 |
| Japan - NPB Reserve League | 2023/05/30 04:00 | Seibu Lions - Reserves v Nipponham Fighters - Reserves | L | 9-3 |
| Japan - NPB Reserve League | 2023/05/02 04:00 | Nipponham Fighters - Reserves v Seibu Lions - Reserves | W | 11-3 |
| Japan - NPB Reserve League | 2023/04/07 04:00 | Seibu Lions - Reserves v Nipponham Fighters - Reserves | L | 4-3 |
| Japan - NPB Reserve League | 2022/08/26 04:00 | Nipponham Fighters - Reserves v Seibu Lions - Reserves | W | 6-4 |
| Japan - NPB Reserve League | 2022/08/23 04:30 | Nipponham Fighters - Reserves v Seibu Lions - Reserves | D | 5-5 |
| Japan - NPB Reserve League | 2023/06/20 04:00 | Nipponham Fighters - Reserves v Seibu Lions - Reserves | L | 2-3 |
| Japan - NPB Reserve League | 2023/06/04 04:00 | Yomiuri Giants - Reserves v Nipponham Fighters - Reserves | W | 3-6 |
| Japan - NPB Reserve League | 2023/06/01 04:00 | Seibu Lions - Reserves v Nipponham Fighters - Reserves | L | 9-1 |
| Japan - NPB Reserve League | 2023/05/31 04:00 | Seibu Lions - Reserves v Nipponham Fighters - Reserves | L | 3-1 |
| Japan - NPB Reserve League | 2023/05/30 04:00 | Seibu Lions - Reserves v Nipponham Fighters - Reserves | L | 9-3 |
| Japan - NPB Reserve League | 2023/05/25 04:00 | Rakuten Eagles - Reserves v Nipponham Fighters - Reserves | L | 10-2 |
| Japan - NPB Reserve League | 2023/05/24 04:00 | Rakuten Eagles - Reserves v Nipponham Fighters - Reserves | L | 3-2 |
| Japan - NPB Reserve League | 2023/05/12 04:00 | Chiba Lotte Marines - Reserves v Nipponham Fighters - Reserves | L | 5-0 |
| Japan - NPB Reserve League | 2023/06/20 04:00 | Nipponham Fighters - Reserves v Seibu Lions - Reserves | W | 2-3 |
| Japan - NPB Reserve League | 2023/06/10 04:00 | Rakuten Eagles - Reserves v Seibu Lions - Reserves | L | 10-3 |
| Japan - NPB Reserve League | 2023/06/08 04:00 | Seibu Lions - Reserves v Yomiuri Giants - Reserves | W | 4-2 |
| Japan - NPB Reserve League | 2023/06/07 04:00 | Seibu Lions - Reserves v Yomiuri Giants - Reserves | W | 6-4 |
| Japan - NPB Reserve League | 2023/06/06 04:00 | Seibu Lions - Reserves v Yomiuri Giants - Reserves | W | 5-1 |
| Japan - NPB Reserve League | 2023/06/01 04:00 | Seibu Lions - Reserves v Nipponham Fighters - Reserves | W | 9-1 |
| Japan - NPB Reserve League | 2023/05/31 04:00 | Seibu Lions - Reserves v Nipponham Fighters - Reserves | W | 3-1 |
| Japan - NPB Reserve League | 2023/05/30 04:00 | Seibu Lions - Reserves v Nipponham Fighters - Reserves | W | 9-3 |