| Koki Kitayama | |
| Position: | Pitcher |
| Team: | Hokkaido Nippon-Ham Fighters |
| Number: | 57 |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | 10 April 1999 |
| Birth Place: | Keihoku, Kyoto, Japan |
| Debutleague: | NPB |
| Debutdate: | March 25 |
| Debutyear: | 2022 |
| Debutteam: | Hokkaido Nippon-Ham Fighters |
| Statyear: | 2023 season |
| Stat1label: | Win–loss record |
| Stat1value: | 9-10 |
| Stat2label: | Earned Run Average |
| Stat2value: | 3.45 |
| Stat3label: | Strikeouts |
| Stat3value: | 116 |
| Stat4label: | Holds |
| Stat4value: | 16 |
| Stat5label: | Saves |
| Stat5value: | 9 |
| Teams: |
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is a professional Japanese baseball player. He is a pitcher for the Hokkaido Nippon-Ham Fighters of Nippon Professional Baseball (NPB).[1]