Most racedays with other riders
Riders sorted by the number of times they started in the same race as Eiichi Hirai.
| # | Rider | Number of races |
|---|---|---|
| 1 | HATANAKA Yusuke | 27 |
| 2 | IRIBE Shotaro | 25 |
| 3 | HATSUYAMA Sho | 25 |
| 4 | NAKAJIMA Yasuharu | 23 |
| 5 | SUMIYOSHI Kota | 21 |
| 6 | LEBAS Thomas | 21 |
| 7 | YOSHIDA Hayato | 21 |
| 8 | YOSHIOKA Naoya | 21 |
| 9 | NAKANE Hideto | 20 |
| 10 | MASUDA Nariyuki | 20 |
| 11 | DOI Yukihiro | 20 |
| 12 | UCHIMA Kohei | 20 |
| 13 | MONIER Damien | 20 |
| 14 | NONAKA Ryoma | 19 |
| 15 | INOUE Kazuo | 19 |
| 16 | TORIBIO José Vicente | 19 |
| 17 | SUZUKI Yuzuru | 19 |
| 18 | ITAMI Kenji | 19 |
| 19 | KIMURA Keisuke | 19 |
| 20 | HIRATSUKA Yoshimitsu | 19 |
| 21 | ITO Masakazu | 17 |
| 22 | GUARDIOLA Salvador | 17 |
| 23 | KOMORI Ryohei | 17 |
| 24 | FUKUHARA Masaru | 16 |
| 25 | SHIMIZU Miyataka | 16 |
| 26 | SUZUKI Ryu | 16 |
| 27 | NISHIZONO Ryota | 16 |
| 28 | TOKUDA Tanzo | 15 |
| 29 | ABE Takayuki | 15 |
| 30 | YASUHARA Daiki | 15 |
| 31 | TSUBAKI Hiroshi | 15 |
| 32 | PRADES Benjamín | 15 |
| 33 | KANO Tomoya | 15 |
| 34 | OKUBO Jin | 15 |
| 35 | MINATO Ryo | 14 |
| 36 | KUBOKI Kazushige | 14 |
| 37 | CRAWFORD Jai | 14 |
| 38 | HAYAKAWA Tomohiro | 14 |
| 39 | SUZUKI Shinri | 14 |
| 40 | HORI Takaaki | 14 |
| 41 | YAMAMOTO Genki | 13 |
| 42 | SANO Junya | 13 |
| 43 | FERNÁNDEZ Airán | 13 |
| 44 | AKIMARU Yuya | 12 |
| 45 | AYABE Takeaki | 12 |
| 46 | TOKUDA Suguru | 12 |
| 47 | ABERASTURI Jon | 12 |
| 48 | OMOTE Toshiki | 12 |
| 49 | ARASHIRO Yudai | 12 |
| 50 | ISHIBASHI Manabu | 12 |