Judo (柔道 jūdō, Japanese pronunciation: [dʑɯꜜːdoː], lit. "gentle way") was originally created in 1882 by Jigoro Kano (嘉納治五郎) as a physical, mental, and moral pedagogy in Japan. It is generally categorized as a modern martial art, which later evolved into a combat and Olympic sport. Its most prominent feature is its competitive element, where the objective is to either throw or take down an opponent to the ground, immobilize or otherwise subdue an opponent with a pin, or force an opponent to submit with a joint lock or a choke. Strikes and thrusts by hands and feet as well as weapons defences are a part of judo, but only in pre-arranged forms (kata, 形) and are not allowed in judo competition or free practice (randori, 乱取り). A judo practitioner is called a judoka.
Basic course lasts about 3 months and you will learn the very basics of the sport.