| Koichi Isobe | |
| Position: | Outfielder / Coach |
| Birth Date: | 12 March 1974 |
| Birth Place: | Higashihiroshima, Hiroshima |
| Bats: | Left |
| Throws: | Right |
| Debutleague: | NPB |
| Debutdate: | April 9 |
| Debutyear: | 1997 |
| Debutteam: | Kintetsu Buffaloes |
| Finalleague: | NPB |
| Finaldate: | April 18 |
| Finalyear: | 2005 |
| Finalteam: | Tohoku Rakuten Golden Eagles |
| Statyear: | 2009 |
| Statleague: | NPB |
| Stat1label: | Batting average |
| Stat1value: | .281 |
| Stat2label: | Home runs |
| Stat2value: | 97 |
| Stat3label: | Hits |
| Stat3value: | 1225 |
| Teams: | As player
As coach
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| Awards: |
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| Update: | 3 August 2019 |
is a former Nippon Professional Baseball outfielder.