Yes you can. But only sparring shoes (which are karate shoes).
Chatan Yarakuu Shanku - The Karate Tournament happened in 1992.
Chatan Yarakuu Shanku - The Karate Tournament was created on 1992-12-01.
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probably flickr.com
According to traditions, you should not walk on Karate mat with shoes on. It will not do anything, but still it will demonstrate your disrespect to the art of Karate. Hence you are not advised to do so.
No You shouldn't wear socks.
You don't have to wear shoes. They protect your feet, but you don't have to wear them.
You need to win in your division in a tournament. You then compete against other division champions in your age group. If you win, you are a grand champion in that tournament.
they did not wear shoes
A standard karate Gi (the white clothes that look like pyjamas)
Tennis shoes only. we can't wear other shoes.