| Masumi Hamachi | |
| Position: | Pitcher |
| Team: | Hanshin Tigers |
| Number: | 36 |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | 25 May 1998 |
| Birth Place: | Nishi-ku, Fukuoka, Japan |
| Debutleague: | NPB |
| Debutdate: | April 4 |
| Debutyear: | 2019 |
| Debutteam: | Hanshin Tigers |
| Statyear: | 2022 season |
| Stat1label: | Win–loss record |
| Stat1value: | 3–4 |
| Stat2label: | Earned run average |
| Stat2value: | 3.06 |
| Stat4label: | Strikeouts |
| Stat4value: | 71 |
| Stat5label: | Saves |
| Stat5value: | 0 |
| Stat6label: | Holds |
| Stat6value: | 21 |
| Teams: |
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is a professional Japanese baseball player. He is a pitcher for the Hanshin Tigers of Nippon Professional Baseball (NPB).[1]