Koshiro Sakamoto

Koshiro Sakamoto (坂本 光士郎)

• Bats Left, Throws Left
• Height 5' 10", Weight 165 lb.

• School Nippon Bunri University
• High School Josuikan High School

• Born September 9, 1994 in Miyoshi, Hiroshima Japan

BR register page

Biographical Information

Koshiro Sakamoto has played in Nippon Pro Baseball.

Sakamoto was drafted by the Yakult Swallows in the 5th round of the 2018 NPB draft; the scout was Kenta Abe. He had a 5.82 ERA in 19 relief outings in 2019, then he mainly stayed in the NPB Farm Leagues so he only got one appearance for the big club in 2020. Sakamoto notched 7 holds with a 4.05 ERA in 36 games in 2021, and he had a 9.28 ERA in 7 games in 2022 before the Swallows traded him to the Chiba Lotte Marines for Daiki Yamamoto. Sakamoto pitched 7 games with a 4.15 ERA in the rest of the season, and he broke out in 2022. He collected 16 holds with a 3.21 ERA in 51 appearances, but he slumped to a 5.37 EAR in 37 relief outings in 2024. Sakamoto struggled again in 2025, and he recorded a 6.35 ERA in 8 games.