Stadium: Meiji Jingu Stadium Round: 1
| Japan NPB | 2018/05/27 09:00 | Yokohama Bay Stars v Yakult Swallows | L | 3-5 |
| Japan NPB | 2018/05/26 09:00 | Yokohama Bay Stars v Yakult Swallows | L | 1-5 |
| Japan NPB | 2018/05/25 09:00 | Yokohama Bay Stars v Yakult Swallows | W | 14-5 |
| Japan NPB | 2018/05/13 04:00 | Yakult Swallows v Yokohama Bay Stars | W | 3-10 |
| Japan NPB | 2018/05/12 05:00 | Yakult Swallows v Yokohama Bay Stars | L | 6-5 |
| Japan NPB | 2018/05/11 09:00 | Yakult Swallows v Yokohama Bay Stars | L | 7-3 |
| Japan NPB | 2018/04/22 09:00 | Yokohama Bay Stars v Yakult Swallows | L | 2-6 |
| Japan NPB | 2018/04/21 09:00 | Yokohama Bay Stars v Yakult Swallows | W | 6-5 |
| Japan NPB | 2018/06/28 09:00 | Hanshin Tigers v Yokohama Bay Stars | L | 3-2 |
| Japan NPB | 2018/06/27 09:00 | Hanshin Tigers v Yokohama Bay Stars | L | 16-6 |
| Japan NPB | 2018/06/26 09:00 | Hanshin Tigers v Yokohama Bay Stars | L | 4-0 |
| Japan NPB | 2018/06/24 05:00 | Yokohama Bay Stars v Chunichi Dragons | W | 6-1 |
| Japan NPB | 2018/06/23 05:00 | Yokohama Bay Stars v Chunichi Dragons | L | 3-5 |
| Japan NPB | 2018/06/22 09:00 | Yokohama Bay Stars v Chunichi Dragons | L | 3-4 |
| Japan NPB | 2018/06/19 09:00 | Rakuten Eagles v Yokohama Bay Stars | L | 7-1 |
| Japan NPB | 2018/06/18 09:00 | Seibu Lions v Yokohama Bay Stars | W | 2-4 |
| Japan NPB | 2018/06/28 09:00 | Chunichi Dragons v Yakult Swallows | W | 6-9 |
| Japan NPB | 2018/06/27 09:00 | Chunichi Dragons v Yakult Swallows | W | 2-7 |
| Japan NPB | 2018/06/26 09:00 | Chunichi Dragons v Yakult Swallows | W | 1-9 |
| Japan NPB | 2018/06/24 05:00 | Yakult Swallows v Yomiuri Giants | W | 3-2 |
| Japan NPB | 2018/06/23 05:00 | Yakult Swallows v Yomiuri Giants | L | 1-7 |
| Japan NPB | 2018/06/22 09:00 | Yakult Swallows v Yomiuri Giants | L | 5-8 |
| Japan NPB | 2018/06/19 09:00 | Softbank Hawks v Yakult Swallows | L | 5-4 |
| Japan NPB | 2018/06/17 05:00 | Yakult Swallows v Nippon Ham Fighters | W | 5-1 |