Most racedays with other riders
Riders sorted by the number of times they started in the same race as Jun Otsuka.
| # | Rider | Number of races |
|---|---|---|
| 1 | ABE Yoshiyuki | 3 |
| 2 | SUZUKI Shinri | 3 |
| 3 | KANO Tomoya | 3 |
| 4 | YONEYAMA Ikki | 3 |
| 5 | FUKUSHIMA Shinichi | 3 |
| 6 | YAMAMOTO Masamichi | 3 |
| 7 | MANABE Kazuyuki | 3 |
| 8 | YEUNG Ronald | 2 |
| 9 | INOUE Kazuo | 2 |
| 10 | HIGUMA Yusuke | 2 |
| 11 | WONG Kam-Po | 2 |
| 12 | HIROSE Satoshi | 2 |
| 13 | WAKUMOTO Masaki | 2 |
| 14 | MUKOUYAMA Kouji | 2 |
| 15 | HIOKI Daisuke | 2 |
| 16 | KAKINUMA Akira | 2 |
| 17 | TSUJI Yoshimitsu | 2 |
| 18 | HIRABAYASHI Masaki | 2 |
| 19 | HIRATSUKA Yoshimitsu | 2 |
| 20 | HATTORI Kenichi | 2 |
| 21 | OKAZAKI Kazuya | 2 |
| 22 | KO Siu Wai | 2 |
| 23 | SANO Junya | 2 |
| 24 | NITO Yasuhiro | 2 |
| 25 | OBATA Kaoru | 2 |
| 26 | BAZAYEV Assan | 2 |
| 27 | NAKAMURA Makoto | 2 |
| 28 | KAMATA Keisuke | 2 |
| 29 | HIROSE Yoshimasa | 2 |
| 30 | MEDYANNIKOV Andrey | 2 |
| 31 | SHIMIZU Yoshiyuki | 2 |
| 32 | NAGANUMA Takayuki | 2 |
| 33 | FENG Chun Kai | 2 |
| 34 | NAKAJIMA Yasuharu | 2 |
| 35 | SHINAGAWA Masahiro | 2 |
| 36 | IIJIMA Makoto | 2 |
| 37 | MAMYROV Bakhtiyar | 2 |
| 38 | IWASHIMA Keita | 2 |
| 39 | ISE Naotox | 2 |
| 40 | BATES Gene | 2 |
| 41 | AYABE Takeaki | 2 |
| 42 | GAROFALO Vincenzo | 2 |
| 43 | SOBAL Yauhen | 1 |
| 44 | BESPALOV Alexander | 1 |
| 45 | LEBEDEV Andri | 1 |
| 46 | BERNUCCI Lorenzo | 1 |
| 47 | SAI-UDOMSIN Phuchong | 1 |
| 48 | IBAÑEZ Carlos Andrés | 1 |
| 49 | QUADRANTI Antonio | 1 |
| 50 | KUPKA David | 1 |