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 between the FJ1600 and the All-Japan Formula Three Championship.
| 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 | 
External links
    
    
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