Most racedays with other riders
Riders sorted by the number of times they started in the same race as Hiroto Onuma.
| # | Rider | Number of races |
|---|---|---|
| 1 | NIYAUCHI Wataru | 1 |
| 2 | AMEZAWA Takeaki | 1 |
| 3 | ASO Keisuke | 1 |
| 4 | KAWAZU Kento | 1 |
| 5 | WATANABE Takahiro | 1 |
| 6 | AKITA Takuma | 1 |
| 7 | SUZUKI Ryu | 1 |
| 8 | OOURA Hisashi | 1 |
| 9 | ASAI Kajima | 1 |
| 10 | SAKO Shunpei | 1 |
| 11 | HIROSE Haruki | 1 |
| 12 | TAKAGI Michinari | 1 |
| 13 | ARASHIRO Yudai | 1 |
| 14 | KONTA Takafumi | 1 |
| 15 | SAWACHI Ryoji | 1 |
| 16 | KODAMA Ryo | 1 |
| 17 | SHIMOJIMA Masaki | 1 |
| 18 | SUGIMURA Kanta | 1 |
| 19 | YASUDA Kyosuke | 1 |
| 20 | OMURA Kohei | 1 |
| 21 | MASHIKO Tomohiro | 1 |
| 22 | AIMOTO Yoshimasa | 1 |
| 23 | SHIODA Kohei | 1 |
| 24 | KUROEDA Saya | 1 |
| 25 | TOKUDA Tanzo | 1 |
| 26 | NAKAZATO Masaru | 1 |
| 27 | KUROEDA Shiki | 1 |
| 28 | ISHIBASHI Manabu | 1 |
| 29 | ISHIHARA Yuya | 1 |
| 30 | OKA Yasumasa | 1 |
| 31 | TOKUDA Suguru | 1 |
| 32 | YOKOYAMA Kota | 1 |
| 33 | HIROSE Itsuki | 1 |
| 34 | KOBAYASHI Taisei | 1 |
| 35 | HORI Takaaki | 1 |
| 36 | KAGA Yudai | 1 |
| 37 | SHIROTA Yamato | 1 |
| 38 | YAMASHITA Yuta | 1 |
| 39 | KOBAYASHI Marino | 1 |
| 40 | MATSUMOTO Yusuke | 1 |
| 41 | KISHI Takahito | 1 |
| 42 | YOSHIDA Yuto | 1 |
| 43 | NISHIO Hayato | 1 |
| 44 | URA Yuki | 1 |
| 45 | KATAGIRI Zenya | 1 |
| 46 | KIMURA Yuki | 1 |