Most racedays with other riders
Riders sorted by the number of times they started in the same race as Seiichiro Aihara.
| # | Rider | Number of races |
|---|---|---|
| 1 | MIKAMO Seijiro | 1 |
| 2 | KAWASAKI Miori | 1 |
| 3 | HASHIMOTO Yuya | 1 |
| 4 | SHINOZAKI Sohei | 1 |
| 5 | SATO Takashi | 1 |
| 6 | KOIDE Itsuki | 1 |
| 7 | SHONO Yuto | 1 |
| 8 | USAMI Hayaki | 1 |
| 9 | KAWANO Shouki | 1 |
| 10 | NAKASHIMA Masato | 1 |
| 11 | TSUISHI Kohei | 1 |
| 12 | KATO Ryo | 1 |
| 13 | HASEGAWA Masaru | 1 |
| 14 | HIRAI Kosuke | 1 |
| 15 | KOYATA Takato | 1 |
| 16 | TAKAGI Rai | 1 |
| 17 | NAKAJIMA Ayumi | 1 |
| 18 | HIGA Yuki | 1 |
| 19 | NAGAKAWA Tatsuya | 1 |
| 20 | KAZAMA Ryuta | 1 |
| 21 | MANABE Ryota | 1 |
| 22 | TAKADA Kento | 1 |
| 23 | YAMADA Takumi | 1 |
| 24 | MATSUBARA Sosuke | 1 |
| 25 | SONODA Taichi | 1 |
| 26 | NAKAMURA Eito | 1 |
| 27 | YUASA Hirotaka | 1 |
| 28 | YAMAMOTO Tetsuo | 1 |
| 29 | TERADA Yoshiki | 1 |
| 30 | OKOCHI Masahiro | 1 |
| 31 | YACHI Kenta | 1 |
| 32 | OKAMOTO Katsuya | 1 |
| 33 | UWANO Hayato | 1 |
| 34 | DOMI Yuta | 1 |
| 35 | NAKAMURA Tatsuyoshi | 1 |
| 36 | KAWANO Aoki | 1 |
| 37 | UGA Ryuki | 1 |
| 38 | WATANABE Ryoma | 1 |
| 39 | KAKIZAKI Eugene | 1 |
| 40 | KOJIMA Naoki | 1 |
| 41 | IKARASHI Kota | 1 |
| 42 | NISHIMOTO Kenzaburo | 1 |
| 43 | KAYAMA Hiryu | 1 |
| 44 | AMANO Takeharu | 1 |
| 45 | SATO Hiroshi | 1 |
| 46 | SATO Hikaru | 1 |
| 47 | KOBAYASHI Ukyo | 1 |
| 48 | YOSHIKI Takumi | 1 |
| 49 | TODOME Yuhi | 1 |
| 50 | KIHARA Yoshihiro | 1 |