Player Directory
Chiba Lotte Marines
Koshiro Sakamoto
Koshiro Sakamoto
36
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ERA
ERA6.35
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strike out rate
K/94.76
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BB Rate
BB/96.35
*Fiscal year 2025
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position
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birthday
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age
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height
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body weight
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Birthplace
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Pitching and batting
left-handed pitcher / left-handed hitter
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Blood type
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Draft Year
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Biography
Joshuikan High School - Nippon Bunri University - Nippon Steel Sumitomo Metal Hirohata - Tokyo Yakult ('19-mid-'22) -Chiba Lotte Marines (mid-'22 onwards)
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Titles won
Videos
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04:10
!["Zudon to Missed It [Left-pitcher Edition]" {Best Scene Selection}](https://img.youtube.com/vi/IY1ilk27oHc/sddefault.jpg)
"Zudon to Missed It [Left-pitcher Edition]" {Best Scene Selection}
2025年01月30日(木) 21:00
![[Firm] In the end, struck out swings with a fastball!! MARINE'S Koshiro Sakamoto 2: A GOOD RELIEF TO DEFEAT struck out AND KEEP runs OUT!! August 31, 2025 Chiba Lotte Marines vs Yomiuri Giants](https://img.youtube.com/vi/HoQ6vFsVV4E/sddefault.jpg)
![[Be careful not to drink too much] I finished four bottles... "A must-see for The Marines fans... Yamaguchi → Sakamoto → Terachi → Ogawa"](https://img.youtube.com/vi/NEcW4VYD6do/sddefault.jpg)
Participation results
pitcher performance: By year
| year | Team | ERA | Appearance | CG | SHO | No Walk | Wins | Lose | H | HP | SV | W-L % | IP | hitter | HR | SO | BB | Hit By Pitch | Wild pitch | Bork | BB/9 | K/9 | K/BB | WHIP | Avg | BABIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2019 |
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5.82 | 19 | 0 | 0 | 0 | 0 | 0 | 3 | 3 | 0 | .000 | 21.2 | 104 | 2 | 15 | 16 | 2 | 2 | 0 | 6.65 | 6.23 | 0.94 | 1.75 | .262 | .290 |
| 2020 |
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12.00 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | 3.0 | 19 | 1 | 3 | 4 | 1 | 0 | 0 | 12.00 | 9.00 | 0.75 | 3.00 | .357 | .400 |
| 2021 |
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4.05 | 36 | 0 | 0 | 0 | 1 | 2 | 7 | 8 | 0 | .333 | 33.1 | 148 | 4 | 25 | 17 | 3 | 2 | 0 | 4.59 | 6.75 | 1.47 | 1.38 | .238 | .253 |
| 2022 |
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9.28 | 7 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | .000 | 10.2 | 59 | 4 | 11 | 9 | 1 | 2 | 0 | 7.59 | 9.28 | 1.22 | 2.25 | .319 | .324 |
| 2022 |
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4.15 | 7 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | .000 | 8.2 | 34 | 3 | 6 | 1 | 0 | 0 | 0 | 1.04 | 6.23 | 6.00 | 1.15 | .273 | .250 |
| 2023 |
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3.21 | 51 | 0 | 0 | 0 | 1 | 0 | 16 | 17 | 0 | 1.000 | 47.2 | 209 | 5 | 48 | 22 | 2 | 2 | 0 | 4.15 | 9.06 | 2.18 | 1.43 | .256 | .311 |
| 2024 |
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5.73 | 37 | 0 | 0 | 0 | 1 | 2 | 11 | 12 | 0 | .333 | 33.0 | 146 | 3 | 34 | 12 | 5 | 2 | 0 | 3.27 | 9.27 | 2.83 | 1.39 | .274 | .337 |
| 2025 |
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6.35 | 8 | 0 | 0 | 0 | 1 | 2 | 2 | 3 | 0 | .333 | 5.2 | 28 | 0 | 3 | 4 | 2 | 0 | 0 | 6.35 | 4.76 | 0.75 | 1.76 | .273 | .316 |
| Overall record | 4.95 | 166 | 0 | 0 | 0 | 4 | 7 | 40 | 44 | 0 | .364 | 163.2 | 747 | 22 | 145 | 85 | 16 | 10 | 0 | 4.67 | 7.97 | 1.71 | 1.53 | .265 | .301 | |
2025/12/5 03:08 更新
hitter performance: By year
| year | Team | AVG | GP | PA | AB | H | 2B | 3B | HR | TB | RBI | R | SO | BB | HBP | SAC | SF | SB | CS | GIDP | SLG | OPS | ISO | ISOD | BB/K | BABIP | AB/HR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2019 |
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.000 | 19 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | .000 | - | - | - |
| 2020 |
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.000 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | .000 | - | - | - |
| 2021 |
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.000 | 36 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | .000 | - | - | - |
| 2022 |
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.000 | 7 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | .000 | .000 | - | - |
| 2022 |
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.000 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | .000 | - | - | - |
| 2023 |
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.000 | 51 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | .000 | - | - | - |
| 2024 |
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.000 | 37 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | .000 | - | - | - |
| 2025 |
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.000 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | .000 | - | - | - |
| Overall record | .000 | 166 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | .000 | .000 | - | - | |
2025/12/5 03:08 更新
article
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How did the team's official podcast come about? A sneak peek at the recording site with Koshiro Sakamoto, Rikuto Yokoyama, Kenta Chatani and Atsuki Tomosugi
Pacific League Insight Yuna Takahashi
2024.8.26(月) 13:00
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![The transfer players are supporting bullpen. Only Kazuya Ojima reached the required number of pitches, and the team struggled this year with the loss of starters. [Chiba Lotte Marines 2023: pitcher]](https://media.insight.pacificleague.com/BF1leEQt7q4oEQPuHYAKjdD2XXGDSrMcxi8GhTFX.jpeg)
The transfer players are supporting bullpen. Only Kazuya Ojima reached the required number of pitches, and the team struggled this year with the loss of starters. [Chiba Lotte Marines 2023: pitcher]
Pacific League Insight
2023.12.26(火) 18:00
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Takahiro Nishimura, Shingo Ishikawa, Koshiro Sakamoto, Keisuke Sawada...The reason why so many players have transferred to Chiba Lotte Marines and become successful
Pacific League Insight Yuta Iwashita
2023.11.24(金) 07:00
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