| Koji Mise | |
| Position: | Pitcher |
| Bats: | Left |
| Throws: | Left |
| Debutleague: | NPB |
| Debutdate: | May 28 |
| Debutyear: | 2004 |
| Debutteam: | Fukuoka Daiei Hawks |
| Finalleague: | NPB |
| Finaldate: | October 1 |
| Finalyear: | 2014 |
| Finalteam: | Chunichi Dragons |
| Statyear: | 2014 season |
| Stat1label: | Win–loss |
| Stat1value: | 11-13 |
| Stat2label: | Earned Run Average |
| Stat2value: | 4.05 |
| Stat3label: | Strikeouts |
| Stat3value: | 242 |
| Stat4label: | Saves |
| Stat4value: | 47 |
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is a Japanese baseball player who played as a left-handed relief pitcher in Nippon Professional Baseball. He played for the Fukoka Hawks from 2004 - 2010 and the Chunichi Dragons from 2010 - 2014. He was named the Pacific League's Rookie of the Year for 2004, with 55 appearances, throwing 67 and 2/3 innings, a 4-3-1 record and a 3.06 ERA with 28 saves. His nickname is "Mise manager".
Mise was born in Kagawa Prefecture in 1976. He played as an outfielder in high school, but eventually switched to being a pitcher. In college, he played on Okayama University of Science's team.