| Fumiya Ono | |
| Position: | Pitcher |
| Team: | Chiba Lotte Marines |
| Number: | 37 |
| Birth Date: | 23 October 1996 |
| Birth Place: | Kurume, Fukuoka, Japan |
| Bats: | Right |
| Throws: | Right |
| Debutleague: | NPB |
| Debutdate: | August 19 |
| Debutyear: | 2015 |
| Debutteam: | Tohoku Rakuten Golden Eagles |
| Statyear: | 2023 season |
| Statleague: | NPB |
| Stat1label: | Win–loss record |
| Stat1value: | 2–7 |
| Stat2label: | ERA |
| Stat2value: | 4.16 |
| Stat3label: | Strikeouts |
| Stat3value: | 158 |
| Stat4label: | Saves |
| Stat4value: | 0 |
| Stat5label: | Holds |
| Stat5value: | 34 |
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is a Japanese professional baseball pitcher for the Chiba Lotte Marines of the Nippon Professional Baseball (NPB). He previously played for the Tohoku Rakuten Golden Eagles.
On December 19, 2019, he was sent to Chiba Lotte Marines as compensation for Daichi Suzuki, who signed with Rakuten as a free agent after the 2019 NPB season[1] [2] He was named an NPB All-Star in .