| Hiroki Ohnishi | |
| Position: | Pitcher |
| Team: | Tokyo Yakult Swallows |
| Number: | 44 |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | 8 November 1997 |
| Birth Place: | Kashiba, Nara, Japan |
| Debutleague: | NPB |
| Debutdate: | June 21 |
| Debutyear: | 2020 |
| Debutteam: | Tokyo Yakult Swallows |
| Statyear: | 2023 season |
| Stat1label: | Win–loss record |
| Stat1value: | 8-5 |
| Stat2label: | Earned Run Average |
| Stat2value: | 3.80 |
| Stat3label: | Strikeouts |
| Stat3value: | 107 |
| Teams: |
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| Highlights: | |
is a Japanese professional baseball pitcher for the Tokyo Yakult Swallows of Nippon Professional Baseball (NPB).[1]