The lower ranks are called kyu. There are six to twelve of them depending on the school. The higher ranks are called dan.
Judo gi
Judo is the name that Jigoro Kano gave the sport. Judo means gentle way.
A dogi is the formal name for the uniform worn by martial arts practitioners in Japan. Most abbreviate the name to gi.
Japan
Tatami
tatami
Judo Vicilanius
judoka
Karate is practiced in bare feet. The karate uniform is called a gi.
Karate means open hand, no weapons
Karate Kid's real name is Val Armorr.
Jaden Smith's name was Dre Parker in Karate Kid.