| Japan NPB Reserve League | 2023/07/22 04:30 | Nipponham Fighters Reserves v Seibu Lions Reserves | L | 12-2 |
| Japan NPB Reserve League | 2023/07/21 09:00 | Nipponham Fighters Reserves v Seibu Lions Reserves | W | 0-1 |
| Japan NPB Reserve League | 2023/06/22 04:00 | Nipponham Fighters Reserves v Seibu Lions Reserves | L | 12-3 |
| Japan NPB Reserve League | 2023/06/21 04:00 | Nipponham Fighters Reserves v Seibu Lions Reserves | W | 2-17 |
| Japan NPB Reserve League | 2023/06/20 04:00 | Nipponham Fighters Reserves v Seibu Lions Reserves | W | 2-3 |
| Japan NPB Reserve League | 2023/06/01 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 |
| Japan NPB Reserve League | 2023/08/03 09:00 | Chiba Lotte Marines Reserves v Seibu Lions Reserves | W | 1-5 |
| Japan NPB Reserve League | 2023/07/30 04:00 | Rakuten Eagles Reserves v Seibu Lions Reserves | L | 11-9 |
| Japan NPB Reserve League | 2023/07/29 04:00 | Rakuten Eagles Reserves v Seibu Lions Reserves | W | 8-10 |
| Japan NPB Reserve League | 2023/07/25 04:00 | Seibu Lions Reserves v Yomiuri Giants Reserves | W | 5-3 |
| Japan NPB Reserve League | 2023/07/22 04:30 | Nipponham Fighters Reserves v Seibu Lions Reserves | L | 12-2 |
| Japan NPB Reserve League | 2023/07/21 09:00 | Nipponham Fighters Reserves v Seibu Lions Reserves | W | 0-1 |
| Japan NPB Reserve League | 2023/07/13 04:00 | Yokohama Bay Stars Reserves v Seibu Lions Reserves | D | 6-6 |
| Japan NPB Reserve League | 2023/07/12 09:00 | Yokohama Bay Stars Reserves v Seibu Lions Reserves | W | 1-2 |
| Japan NPB Reserve League | 2023/08/03 04:00 | Yakult Swallows Reserves v Nipponham Fighters Reserves | W | 6-7 |
| Japan NPB Reserve League | 2023/08/02 04:00 | Yakult Swallows Reserves v Nipponham Fighters Reserves | W | 6-13 |
| Japan NPB Reserve League | 2023/08/01 04:00 | Yakult Swallows Reserves v Nipponham Fighters Reserves | D | 4-4 |
| Japan NPB Reserve League | 2023/07/22 04:30 | Nipponham Fighters Reserves v Seibu Lions Reserves | W | 12-2 |
| Japan NPB Reserve League | 2023/07/21 09:00 | Nipponham Fighters Reserves v Seibu Lions Reserves | L | 0-1 |
| Japan NPB Reserve League | 2023/07/10 04:00 | Rakuten Eagles Reserves v Nipponham Fighters Reserves | W | 5-8 |
| Japan NPB Reserve League | 2023/06/29 04:00 | Chiba Lotte Marines Reserves v Nipponham Fighters Reserves | L | 8-4 |
| Japan NPB Reserve League | 2023/06/28 04:00 | Chiba Lotte Marines Reserves v Nipponham Fighters Reserves | W | 5-7 |