| Koshiro Sakamoto | |
| Position: | Pitcher |
| Team: | Chiba Lotte Marines |
| Number: | 36 |
| Bats: | Left |
| Throws: | Left |
| Birth Date: | 9 September 1994 |
| Birth Place: | Miyoshi, Hiroshima, Japan |
| Debutleague: | NPB |
| Debutdate: | April 24 |
| Debutyear: | 2019 |
| Debutteam: | Tokyo Yakult Swallows |
| Statyear: | 2023 season |
| Stat1label: | Win–loss record |
| Stat1value: | 2-3 |
| Stat2label: | Earned Run Average |
| Stat2value: | 4.68 |
| Stat3label: | Strikeouts |
| Stat3value: | 108 |
| Stat4label: | Saves |
| Stat4value: | 0 |
| Stat5label: | Holds |
| Stat5value: | 27 |
| Teams: |
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is a professional Japanese baseball pitcher for the Chiba Lotte Marines of Nippon Professional Baseball (NPB).[1] [2] He previously played in NPB for the Tokyo Yakult Swallows.
On April 24, 2019, Sakamoto made his NPB debut for the Tokyo Yakult Swallows. He played for the team through the 2022 season.
On July 28, 2022, Sakamoto was traded to the Chiba Lotte Marines in exchange for Daiki Yamamoto.