Jigoro Kano, the founder of Judo, proposed this moral code for judoka to follow.
Courtesy
Be polite to other people
Courage
Face difficulty without fear
Fairplay
Be a good sport, play by the rules
Honour
Fairness in beliefs and actions
Modesty
Be without vanity or boastfulness
Respect
Regard for others
Self-control
Control over yourself and actions
Friendship
Be a good friend, be helpful and kind
Hygiene
Wear a clean judogi. No shoes on the mat. Zoris (or shoes) worn off the mat.