Most racedays with other riders
Riders sorted by the number of times they started in the same race as Kota Sumiyoshi.
| # | Rider | Number of races |
|---|---|---|
| 1 | OKAMOTO Hayato | 47 |
| 2 | YAMAMOTO Genki | 47 |
| 3 | KUROEDA Shiki | 46 |
| 4 | IRIBE Shotaro | 43 |
| 5 | SUZUKI Yuzuru | 41 |
| 6 | YASUHARA Daiki | 41 |
| 7 | ARASHIRO Yudai | 39 |
| 8 | TORIBIO José Vicente | 38 |
| 9 | ABE Takayuki | 38 |
| 10 | HATANAKA Yusuke | 38 |
| 11 | YOSHIOKA Naoya | 38 |
| 12 | MASUDA Nariyuki | 37 |
| 13 | ISHIBASHI Manabu | 36 |
| 14 | ONODERA Rei | 35 |
| 15 | LEBAS Thomas | 34 |
| 16 | ASO Keisuke | 34 |
| 17 | KOMORI Ryohei | 34 |
| 18 | KUROEDA Saya | 34 |
| 19 | YAMAMOTO Masaki | 33 |
| 20 | WATANABE Shotaro | 32 |
| 21 | HORI Takaaki | 32 |
| 22 | KUSABA Keigo | 31 |
| 23 | OKA Atsushi | 31 |
| 24 | MAGOSAKI Daiki | 30 |
| 25 | HAYAKAWA Tomohiro | 29 |
| 26 | PRADES Benjamín | 29 |
| 27 | KIMURA Keisuke | 29 |
| 28 | TANI Junsei | 29 |
| 29 | KOISHI Yuma | 28 |
| 30 | NAKAI Tadaaki | 26 |
| 31 | SANO Junya | 26 |
| 32 | MINATO Ryo | 26 |
| 33 | NISHIO Hayato | 26 |
| 34 | KOBAYASHI Marino | 25 |
| 35 | SHIBATA Masayuki | 25 |
| 36 | YOKOYAMA Kota | 25 |
| 37 | YOSHIDA Hayato | 25 |
| 38 | SUZUKI Ryu | 25 |
| 39 | TOKUDA Suguru | 25 |
| 40 | ITO Masakazu | 24 |
| 41 | SAWADA Keitaro | 24 |
| 42 | NAKAJIMA Yasuharu | 24 |
| 43 | YOKOTSUKA Kohei | 24 |
| 44 | MUKAIGAWA Naoki | 24 |
| 45 | TAKEMURA Taku | 23 |
| 46 | OKUBO Jin | 23 |
| 47 | NAKANE Hideto | 22 |
| 48 | NISHIO Keito | 22 |
| 49 | HIRAI Eiichi | 21 |
| 50 | ISHIGAMI Masahiro | 21 |