Keirin is a bike race. 

Keirin is a fast bike race. 
Riders ride bikes on a track. They stay behind a pacer. A pacer is a person on a motor. The pacer helps them go fast. 
The pacer leaves the track early. Then the riders sprint to win. They can go very fast! 
This sport started in Japan. It is now in the Olympics. Many people love to watch it.
Keirin is an exciting type of bike race. 
In a race, riders follow a pacer. A pacer is a person on a motor or a bike. The pacer helps the racers build speed. The riders must stay behind the pacer for three laps. 
In Japan, being a pro rider takes hard work. New riders go to a special school. They must train for 15 hours every day. 
Keirin is a fast and exciting form of cycle racing. 
A race follows a very specific set of steps. 

The history of Keirin begins in Japan around the year 1948. It was originally created for gambling purposes. Over time, it grew into a major international sport. The men's event joined the Olympics in Sydney, Australia, in 2000. The women's event was added later for the London Olympics in 2012.
Becoming a professional rider in Japan is a very hard job. 
Keirin connects to the wider world of professional cycling. 
Keirin is a specialized form of motor-paced cycle racing.
A typical race follows a strict mechanical sequence. 

Competitive racing involves different stages and complex structures. Races are conducted over several rounds, leading up to a final. Some cyclists who are eliminated in early rounds may get another chance through a process called repechages. In Japan, riders often form groups known as "lines" during the race. Within these lines, cyclists try to work together to maximize their chances of winning. The track itself is divided into specific areas, including two straightaways, four turns, and two center areas located between the corners. Referees monitor the race from towers and control rooms using closed-circuit cameras to ensure all rules are followed.
The history of Keirin is deeply rooted in Japan. It was developed around 1948 for gambling purposes and became an official betting sport in Japan that same year. In 1957, the Nihon Jitensha Shinkōkai (NJS), or Japan Bicycle Association, was founded to create uniform standards. The sport reached a major international milestone when it was admitted to the Olympics in 1996. The men's event made its debut at the 2000 Sydney Olympics. Later, the women's event was added for the 2012 London Olympics. 
The professional structure in Japan is highly regulated and demanding. Aspiring riders must apply to the Japan Keirin School, but only 10 percent of applicants are accepted. These students undergo a strict training regimen of 15 hours per day. Once they pass, they are assigned a rank, starting at A3. There are six total ranks: SS, S1, S2, A1, A2, and A3. 
Keirin features many significant figures and massive economic scale. In 2011, bets placed on Keirin exceeded ¥600 billion, which is approximately US$5 billion. During that same year, about 4.9 million people attended the races. Legendary athletes have defined the sport's history. Katsuaki Matsumoto holds the record for the most professional wins with 1,341 victories. 
Finally, Keirin is connected to the broader world of international cycling through the Union Cycliste Internationale (UCI). The UCI organizes the World Championships, which have featured men since 1980 and women since 2002. This connection allows the Japanese tradition to interact with global standards of athleticism. The sport combines local Japanese customs, such as the formal bowing, with a highly technical, international competitive framework. It remains a unique intersection of cultural tradition, rigorous professional training, and extreme physical speed.
🖼️ Images & Media (7)
More to explore
✨ What else?
Related topics you might enjoy
🔬 Go deeper
More advanced topics to explore
🪜 Step back
Simpler topics to build understanding
What is Nepedia?
A free, ad-free encyclopedia for children. Every article is written at five reading levels, so the same page works for a five-year-old and a fifteen-year-old — use the level switcher above to see this one change. No account needed to read.