| Keiyo Aomatsu | |
| Position: | First baseman |
| Birth Date: | 7 December 1986 |
| Birth Place: | Kyoto, Japan |
| Bats: | Right |
| Throws: | Right |
| Debutdate: | September 26 |
| Debutyear: | 2006 |
| Debutteam: | Chiba Lotte Marines |
| Statleague: | NPB |
| Stat1label: | Batting average |
| Stat1value: | .214 |
| Stat2label: | Home runs |
| Stat2value: | 1 |
| Stat3label: | RBI |
| Stat3value: | 5 |
| Teams: |
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is a former Japanese Nippon Professional Baseball player with the Chiba Lotte Marines of Japan's Pacific League.