Player Directory


Tohoku Rakuten Golden Eagles
Tatsuki Koja
Tatsuki Koja
17
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ERA
ERA3.70
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strike out rate
K/96.39
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BB Rate
BB/92.27
*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
Shonan Gakuin High School - Toin Yokohama University - 2024 Rakuten D①
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Titles won
Participation results
Season results
| ERA | 3.70 | Appearance | 19 |
|---|---|---|---|
| CG | 1 | SHO | 1 |
| No Walk | 0 | Wins | 7 |
| Lose | 7 | H | 0 |
| Holds | 1 | Saves | 0 |
| W-L % | .500 | IP | 107.0 |
| hitter | 459 | HR | 8 |
| Strike Outs | 76 | BB | 27 |
| Hit By Pitch | 3 | Wild pitch | 1 |
| Bork | 0 | Runs Allowed | 48 |
| earned runs | 44 | BB/9 | 2.27 |
| K/9 | 6.39 | K/BB | 2.81 |
| WHIP | 1.36 | Avg | .282 |
| BABIP | .319 |
Results by condition
pitcher performance: By game
| date | result | IP | Number of pitch | hitter | H | HR | SO | BB | Hit By Pitch | Runs Allowed | earned runs | ERA |
|---|
| October | 3.0 | 45 | 12 | 3 | 1 | 0 | 1 | 0 | 1 | 1 | 3.00 |
|---|
| 10/4 | ![]() |
Win | 3 | 45 | 12 | 3 | 1 | 0 | 1 | 0 | 1 | 1 | 3.70 |
|---|
| September | 23.0 | 361 | 100 | 26 | 3 | 20 | 6 | 1 | 15 | 13 | 5.09 |
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| August | 25.2 | 412 | 110 | 29 | 0 | 21 | 4 | 1 | 10 | 8 | 2.81 |
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| July | 16.0 | 238 | 64 | 20 | 1 | 14 | 0 | 0 | 3 | 3 | 1.69 |
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| June | 5.2 | 105 | 28 | 9 | 0 | 1 | 3 | 0 | 3 | 3 | 4.76 |
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| May | 3.0 | 51 | 14 | 4 | 2 | 4 | 2 | 0 | 3 | 3 | 9.00 |
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| April | 25.2 | 422 | 112 | 25 | 1 | 13 | 10 | 1 | 13 | 13 | 4.56 |
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| March | 5.0 | 71 | 19 | 2 | 0 | 3 | 1 | 0 | 0 | 0 | 0.00 |
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hitter performance: By game
| date | AB | H | HR | R | RBI | SO | BB | HBP | SB | SAC | AVG | Batting results (video) |
|---|
| October | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | - |
|---|
| 10/4 | ![]() |
0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .--- |
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| September | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | - |
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| August | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | - |
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| July | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | - |
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| June | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | - |
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| May | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | - |
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| April | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | - |
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| March | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | - |
|---|
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 |
|
4.32 | 15 | 0 | 0 | 0 | 5 | 8 | 0 | 0 | 0 | .385 | 83.1 | 347 | 10 | 58 | 31 | 7 | 0 | 0 | 3.35 | 6.26 | 1.87 | 1.21 | .231 | .249 |
| 2025 |
|
3.70 | 19 | 1 | 1 | 0 | 7 | 7 | 0 | 1 | 0 | .500 | 107.0 | 459 | 8 | 76 | 27 | 3 | 1 | 0 | 2.27 | 6.39 | 2.81 | 1.36 | .282 | .319 |
| Overall record | 3.97 | 34 | 1 | 1 | 0 | 12 | 15 | 0 | 1 | 0 | .444 | 190.1 | 806 | 18 | 134 | 58 | 10 | 1 | 0 | 2.74 | 6.34 | 2.31 | 1.29 | .261 | .290 | |
2025/12/6 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 |
|
.000 | 15 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | .000 | .000 | - | - |
| 2025 |
|
.000 | 19 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | .000 | - | - | - |
| Overall record | .000 | 34 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | .000 | .000 | - | - | |
2025/12/6 03:08 更新
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