This clip portraying the excitement of the Japanese gambling phenomenon, of Keirin racing, Samurai on bikes, is an extract from the BBC series "Bicycle" produced by York Films of England.
Despite being unacceptable in polite society, gambling is extemely popular and profits are huge. Either way the action is spectacular. Continued in "Keirin Two"
You can own the series described as "The best cycling documentary ever " by top US cycling magazine, "Bicycling", on DVD.