Judo is a fusion of ancient combat art, modern sports training, and a philosophy of continuous improvement. It is a complex system that preserves martial traditions and techniques of Japan, but is also a popular sport that prepares the student for any physical confrontation off the mat. It is a safe and fun recreational activity that emphasizes building character. It is an art that allows free expression and displays the beauty of co-ordinated movement. It is a method of training the body and mind using principles that can also apply to how you lead your life. Both sport and martial art, Judo has unique depth and strength not readily found in other sports or martial arts.
If you are still not sure what Judo is take some time to watch these demonstration videos showing the first two sets of official Judo throws.

The first video shows the first eight throws in the first set:

The next video shows the second set of eight throws: