| Tatsuya Imai | |
| Position: | Pitcher |
| Team: | Saitama Seibu Lions |
| Number: | 48 |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | 9 May 1998 |
| Birth Place: | Kanuma, Tochigi, Japan |
| Debutleague: | NPB |
| Debutdate: | June 13 |
| Debutyear: | 2018 |
| Debutteam: | Saitama Seibu Lions |
| Statyear: | July 20, 2024 |
| Statleague: | NPB |
| Stat1label: | Win–loss |
| Stat1value: | 42–38 |
| Stat2label: | ERA |
| Stat2value: | 3.52 |
| Stat3label: | Strikeouts |
| Stat3value: | 663 |
| Teams: |
|
| Awards: |
|
is a Japanese professional baseball pitcher for the Saitama Seibu Lions of Nippon Professional Baseball (NPB).