Judo gi
By using a throw
Judo is the name that Jigoro Kano gave the sport. Judo means gentle way.
None,judo and karate are two different things, each one has its advantages anddisadvantages.In judo you have to throw people to the ground. In Karate you can punch and kick.
Judo is great in the clinch but worthless on the ground, BJJ is great on the ground, but worthless in the clinch. Neither style is better than the other on defense, it depends on how you fight. Judo is good to keep you off the ground, or at least off of your back. BJJ is good because if you get put on your back you can submit or reverse with ease.
Japan
tatami
Judo Vicilanius
judoka
It does not hurt when they hit the ground, they 'slap' it to break their fall.Also, when you are in a lock and you can't escape you 'tap' to surrender.
Kodokan
It got it's name from it's founder Jigoro Kano. Kano was a master of several styles of jujutsu. Judo means "gentle way."