| Japan Phoenix League | 2023/10/30 02:00 | Seibu Lions Reserves v Hiroshima Carp Reserves | D | 0-0 |
| Japan Phoenix League | 2023/10/14 03:30 | Hanshin Tigers Reserves v Seibu Lions Reserves | W | 1-2 |
| Japan NPB Reserve League | 2023/09/29 07:00 | Seibu Lions Reserves v Yomiuri Giants Reserves | L | 1-6 |
| Japan NPB Reserve League | 2023/09/24 04:00 | Yokohama Bay Stars Reserves v Seibu Lions Reserves | W | 2-3 |
| Japan NPB Reserve League | 2023/09/23 04:30 | Yokohama Bay Stars Reserves v Seibu Lions Reserves | W | 0-2 |
| Japan NPB Reserve League | 2023/09/22 09:00 | Yokohama Bay Stars Reserves v Seibu Lions Reserves | L | 4-0 |
| Japan NPB Reserve League | 2023/09/17 04:00 | Chiba Lotte Marines Reserves v Seibu Lions Reserves | W | 4-10 |
| Japan NPB Reserve League | 2023/09/16 04:00 | Chiba Lotte Marines Reserves v Seibu Lions Reserves | W | 1-2 |