International Mountain Bicycling Association (IMBA) - http://www.imba.com/
The IMBA is a non-profit and public-supported organization which helps to promot environmentall friendly cycling and cycling events.
Japanese Cycling Federation - http://www.jcf.or.jp/
National cycling organization in Japan. Includes information on the sport in the country and about events.
World Wide Cycling - http://www.worldwidecycling.com/
Helps to bring cycling to countries where it is not traditionally practiced as a sport and also promotes the activity itself.