Japan Formula 4
The JAF Japan Formula 4 (JAF 地方選手権 F4, JAF Chihou Senshuken) is a formula racing class in Japan. The class was founded in 1993 by the Japan Automobile Federation as a class above the FJ1600 and below the former All-Japan Formula Three Championship and the current Formula Regional Japanese Championship and Super Formula Lights.
| Category | Single seaters |
|---|---|
| Country |  Japan |
| Inaugural season | 1993 |
| Tyre suppliers | Yokohama (2008—2011) Dunlop (2012–present) |
| Drivers' champion | West: Keisuke Ohara East: Yuki Tsunoda |
| Official website | Formula 4 |
Car
The Japanese Formula 4 is an open chassis class, open for all chassis manufacturers. Since 2012 the engines have a maximum capacity of 2,000cc. Currently the cars are allowed to be fitted with a Honda K20A, Toyota 3ZR or Nissan SR20 engine. Since 2010 the cars use a monocoque chassis instead of a tube frame. In the first year of the monocoque chassis most cars were West Racing Cars.
Champion
| Season | East Champion | West Champion |
|---|---|---|
| 1993 |  ? |
? |
| 1994 | ? |
? |
| 1995 | ? |
? |
| 1996 | ? |
? |
| 1997 | Akihiro Asai |
? |
| 1998 | Takeyuki Kishi |
? |
| 1999 | ? |
Keita Sawa |
| 2000 | Issei Nishio |
Hideaki Nakao |
| 2001 | ? |
? |
| 2002 | Tetuya Fujisawa |
? |
| 2003 | Kei Itaka |
? |
| 2004 | Masanobu Katou |
Koudai Tsukakoshi |
| 2005 | Aki Okada |
? |
| 2006 | Muneyuki Kurifu |
? |
| 2007 | Kei Itaka |
? |
| 2008 | Yusuke Tsuchiya |
Shota Hanaoka |
| 2009 | Tsubasa Kondo |
Shota Hanaoka |
| 2010 | Makoto Kanai |
Naoki Nishimoto |
| 2011 | Yuhi Sekiguchi |
Ryo Hirakawa |
| 2012 | Ryousuke Takehira |
Kosuke Hattori |
| 2013 | Kenta Yamashita |
Nobuo Kubo |
| 2014 | Yuichi Mikasa |
Nirei Fukuzumi |
| 2015 | Tadasuke Makino |
Tadasuke Makino |
| 2016 | Toshiki Ōyu |
Toshiki Ōyu |
| 2017 | Yuki Tsunoda |
Keisuke Ohara |
| 2018 | Ryotada Kanai |
Nobuo Kubo |
| Champion | ||
| 2019 | Kohei Tokuma | |
| 2020 | Isao Nakajima | |
| 2021 | Yuya Motojima | |
External links
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