[5] Koshigaya Alphas 63-73 Sendai 89ers [4] 2021-04-21 10:00
Stadium: Koshigaya Municipal Gymnasium Round: 1
Head to Head
| Japan B League 2 | 2021/01/31 04:00 | Sendai 89ers v Koshigaya Alphas | W | 63-75 |
| Japan B League 2 | 2021/01/30 06:00 | Sendai 89ers v Koshigaya Alphas | W | 89-101 |
| Japan B League 2 | 2020/12/09 10:00 | Koshigaya Alphas v Sendai 89ers | W | 72-64 |
| Japan B League 2 | 2020/10/28 10:00 | Sendai 89ers v Koshigaya Alphas | W | 82-91 |
| Japan B League 2 | 2020/02/09 06:00 | Koshigaya Alphas v Sendai 89ers | L | 55-58 |
| Japan B League 2 | 2020/02/08 06:00 | Koshigaya Alphas v Sendai 89ers | L | 68-85 |
| Japan B League 2 | 2019/11/10 04:30 | Sendai 89ers v Koshigaya Alphas | L | 77-73 |
| Japan B League 2 | 2019/11/09 04:30 | Sendai 89ers v Koshigaya Alphas | L | 85-76 |
Home History
| Japan B League 2 | 2021/04/18 05:00 | Gunma Crane Thunders v Koshigaya Alphas | L | 86-78 |
| Japan B League 2 | 2021/04/17 08:00 | Gunma Crane Thunders v Koshigaya Alphas | L | 86-69 |
| Japan B League 2 | 2021/04/15 10:00 | Ibaraki Robots v Koshigaya Alphas | L | 101-89 |
| Japan B League 2 | 2021/04/10 05:00 | Koshigaya Alphas v Earth Friends Tokyo Z | L | 78-79 |
| Japan B League 2 | 2021/04/09 10:00 | Koshigaya Alphas v Earth Friends Tokyo Z | L | 72-77 |
| Japan B League 2 | 2021/03/21 05:00 | Gunma Crane Thunders v Koshigaya Alphas | L | 100-68 |
| Japan B League 2 | 2021/03/20 08:00 | Gunma Crane Thunders v Koshigaya Alphas | L | 96-81 |
| Japan B League 2 | 2021/03/14 05:00 | Yamagata Wyverns v Koshigaya Alphas | W | 71-75 |
Away History
| Japan B League 2 | 2021/04/18 05:00 | Ibaraki Robots v Sendai 89ers | L | 104-86 |
| Japan B League 2 | 2021/04/17 08:00 | Ibaraki Robots v Sendai 89ers | L | 102-93 |
| Japan B League 2 | 2021/04/14 09:30 | Sendai 89ers v Gunma Crane Thunders | W | 76-70 |
| Japan B League 2 | 2021/04/11 05:00 | Aomori Wat's v Sendai 89ers | W | 65-88 |
| Japan B League 2 | 2021/04/10 09:00 | Aomori Wat's v Sendai 89ers | W | 58-61 |
| Japan B League 2 | 2021/04/04 04:00 | Sendai 89ers v Yamagata Wyverns | W | 80-65 |
| Japan B League 2 | 2021/04/03 05:00 | Sendai 89ers v Yamagata Wyverns | W | 84-55 |
| Japan B League 2 | 2021/03/24 09:30 | Sendai 89ers v Fukushima Fire Bonds | L | 86-88 |